基于维度调制的准二维蓝色钙钛矿发光二极管 增强出版

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[], "deceased": false }, { "name": [ { "lang": "zh", "surname": "蓝", "givenname": "茜", "namestyle": "eastern", "prefix": "" }, { "lang": "en", "surname": "LAN", "givenname": "Xi", "namestyle": "eastern", "prefix": "" } ], "stringName": [], "aff": [ { "rid": "aff1", "text": "" } ], "role": [], "deceased": false }, { "name": [ { "lang": "zh", "surname": "邵", "givenname": "志良", "namestyle": "eastern", "prefix": "" }, { "lang": "en", "surname": "Shao", "givenname": "Zhiliang", "namestyle": "eastern", "prefix": "" } ], "stringName": [], "aff": [ { "rid": "aff1", "text": "" } ], "role": [], "deceased": false }, { "name": [ { "lang": "zh", "surname": "叶", "givenname": "方浩", "namestyle": "eastern", "prefix": "" }, { "lang": "en", "surname": "Ye", "givenname": "Fanghao", "namestyle": "eastern", "prefix": "" } ], "stringName": [], "aff": [ { "rid": "aff1", "text": "" } ], "role": [ "corresp" ], "corresp": [ { "rid": "cor1", "lang": "en", "text": "E-mail： yefanghao@szu.edu.cn", "data": [ { "name": "text", "data": "E-mail： yefanghao@szu.edu.cn" } ] } ], "bio": [ { "lang": "zh", "text": [ "叶方浩(1991-)，男，湖北省武汉人，博士，2020年于武汉理工大学获得博士学位，主要从事于发光材料与器件方面的研究。 E-mail: yefanghao@szu.edu.cnE-mail: yefanghao@szu.edu.cn" ], "graphic": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733428&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733430&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733429&type=", "width": "19.36105347", "height": "23.25604248", "fontsize": "" } ], "data": [ [ { "name": "text", "data": "叶方浩" }, { "name": "text", "data": "(1991-)，男，湖北省武汉人，博士，2020年于武汉理工大学获得博士学位，主要从事于发光材料与器件方面的研究。 E-mail: yefanghao@szu.edu.cnE-mail: " }, { "name": "text", "data": "yefanghao@szu.edu.cn" } ] ] } ], "email": "yefanghao@szu.edu.cn", "deceased": false }, { "name": [ { "lang": "zh", "surname": "李", "givenname": "贵君", "namestyle": "eastern", "prefix": "" }, { "lang": "en", "surname": "Li", "givenname": "Guijun", "namestyle": "eastern", "prefix": "" } ], "stringName": [], "aff": [ { "rid": "aff1", "text": "" } ], "role": [ "corresp" ], "corresp": [ { "rid": "cor2", "lang": "en", "text": "gliad@connect.ust.hk", "data": [ { "name": "text", "data": "gliad@connect.ust.hk" } ] } ], "bio": [ { "lang": "zh", "text": [ "李贵君（1984-），男，博士， 2016年于香港科技大学获得博士学位，主要从事新型显示技术和高效光伏电池技术方向的研究。E-mail： gliad@connect.ust.hk" ], "graphic": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733431&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733433&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733432&type=", "width": "18.04500008", "height": "27.05800056", "fontsize": "" } ], "data": [ [ { "name": "text", "data": "李贵君" }, { "name": "text", "data": "（1984-），男，博士， 2016年于香港科技大学获得博士学位，主要从事新型显示技术和高效光伏电池技术方向的研究。E-mail： " }, { "name": "text", "data": "gliad@connect.ust.hk" } ] ] } ], "email": "gliad@connect.ust.hk", "deceased": false } ], "aff": [ { "id": "aff1", "intro": [ { "lang": "zh", "text": "深圳大学 物理与光电工程学院，广东 深圳　518060", "data": [ { "name": "text", "data": "深圳大学 物理与光电工程学院，广东 深圳　518060" } ] }, { "lang": "en", "text": "College of Physics and Optoelectronic Engineering， Shenzhen University， Shenzhen 518060， China", "data": [ { "name": "text", "data": "College of Physics and Optoelectronic Engineering， Shenzhen University， Shenzhen 518060， China" } ] } ] } ] }, "abstracts": [ { "lang": "zh", "data": [ { "name": "p", "data": [ { "name": "text", "data": "金属卤化物钙钛矿（MHP）作为一种新兴的半导体材料，目前已在光电应用中表现出优异的性能。其中，基于MHP的发光二极管（PeLED）发展迅猛，红光和绿光器件的效率已达到商用水平。然而，蓝光 PeLED 的效率还远落后于红、绿光器件，这在很大程度上阻碍了 PeLED 在全彩显示领域中的应用。本文通过调节混合卤素阴离子的比例以及准二维钙钛矿组分来实现基于维度调制的准二维蓝色 PeLED 制备。首先，作者采用在 CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "：PEABr 准二维钙钛矿中添加苯乙基氯化胺（PEACl）逐步替换苯乙基溴化胺（PEABr），实现了发光峰从502 nm到476 nm的可调制发射。然而，随着PEACl的增加，薄膜中的缺陷及n = 1 低维相逐渐增多，导致器件效率降低。作者将溴化胍（GABr）引入到CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "：PEACl 准二维钙钛矿中，n = 1 低维相得到了显著的抑制，这有利于激子能量的转移，最终蓝光范围内准二维 PeLED 性能得到了显著提升。作者的工作为实现高效蓝光 PeLED 提供了新的思路。" } ] } ] }, { "lang": "en", "data": [ { "name": "p", "data": [ { "name": "text", "data": "As a new semiconductor material， metal halide perovskite （MHP） has shown excellent performance in photoelectric applications. Among them， MHP based light emitting diodes （PeLEDs） have developed rapidly， and the efficiency of red and green light devices has reached the commercial level. However， the efficiency of blue PeLED still lags far behind the counterparts， which largely hinders the application of PeLED in the field of full color display. In this paper， the blue-color quasi two-dimensional PeLED based on dimensional modulation is prepared by adjusting the proportion of mixed halogen anions and the composition of quasi two-dimensional perovskite. Firstly， we used the addition of phenylethylamine chloride （PEACl） to CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "： PEABr quasi two-dimensional perovskite to gradually replace phenylethylamine bromide （PEABr）， and realized the modulated emission peak from 502 nm to 476 nm. However， with the increase of PEACl， the defects and n = 1 low-dimensional phase in thin films gradually increase， leading to a decrease of device efficiency. The authors introduced guanidine bromide （GABr） into CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "：PEACl blue quasi-two-dimensional perovskite， and the n = 1 low-dimensional phase was significantly inhibited， which was conducive to exciton energy transfer， and finally the performance of quasi-two-dimensional PeLED was significantly improved in the range of blue light. This work provides a new approach for realizing efficient blue PeLED." } ] } ] } ], "keyword": [ { "lang": "zh", "data": [ [ { "name": "text", "data": "钙钛矿发光二极管" } ], [ { "name": "text", "data": "维度调制" } ], [ { "name": "text", "data": "蓝光" } ], [ { "name": "text", "data": "PEACl掺杂" } ], [ { "name": "text", "data": "GABr掺杂" } ] ] }, { "lang": "en", "data": [ [ { "name": "text", "data": "Perovskite light-emitting diode" } ], [ { "name": "text", "data": "Phase modulation" } ], [ { "name": "text", "data": "Blue emission" } ], [ { "name": "text", "data": "PEACl doping" } ], [ { "name": "text", "data": "GABr doping" } ] ] } ], "highlights": [], "body": [ { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "1　引　　言" } ], "level": "1", "id": "s1" } }, { "name": "p", "data": [ { "name": "text", "data": "近年来，在AR（增强现实）/VR（虚拟现实）显示、柔性可折叠的异形屏、半透明显示以及大尺寸显示等旺盛需求的驱动下，新型发光二极管（LED）技术进入了蓬勃发展时期。这里包括有机LED（OLED）、量子点LED（QLED）、钙钛矿LED（PeLED）以及Micro-LED" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "1", "type": "bibr", "rid": "R1", "data": [ { "name": "text", "data": "1" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "3", "type": "bibr", "rid": "R3", "data": [ { "name": "text", "data": "3" } ] } } ], "rid": [ "R1", "R2", "R3" ], "text": "1-3", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。其中，基于金属卤化物钙钛矿（MHP）的PeLED器件受到了科研工作者极大的关注。最主要的原因是MHP具有极窄的发射光谱半峰宽，这意味着它能够在可见光波段显示出更丰富、饱和度更高的色彩" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "4", "type": "bibr", "rid": "R4", "data": [ { "name": "text", "data": "4" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。此外，MHP具有制备成本低、发光颜色易调节以及载流子迁移率高等优点，因此基于该材料的PeLED器件展现出了前所未有的优势" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "5", "type": "bibr", "rid": "R5", "data": [ { "name": "text", "data": "5" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "9", "type": "bibr", "rid": "R9", "data": [ { "name": "text", "data": "9" } ] } } ], "rid": [ "R5", "R6", "R7", "R8", "R9" ], "text": "5-9", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。目前，绿光和红光PeLED的外量子效率（EQE）均达到了24%以上" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "10", "type": "bibr", "rid": "R10", "data": [ { "name": "text", "data": "10" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "11", "type": "bibr", "rid": "R11", "data": [ { "name": "text", "data": "11" } ] } } ], "rid": [ "R10", "R11" ], "text": "10-11", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "，而蓝光器件为18%" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "12", "type": "bibr", "rid": "R12", "data": [ { "name": "text", "data": "12" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "，尤其是在显示应用中所必须的纯蓝光波段（460-470 nm），最高效率仅为10%" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "12", "type": "bibr", "rid": "R12", "data": [ { "name": "text", "data": "12" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。因此，蓝光PeLED亟待进一步的研究和改进来加快提升它的性能。" } ] }, { "name": "p", "data": [ { "name": "text", "data": "MHP材料的一个优点是在可见光范围内可以通过简单地改变卤素阴离子的组成来连续调节发射光谱" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "13", "type": "bibr", "rid": "R13", "data": [ { "name": "text", "data": "13" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。对于蓝光而言，将 Cl 混合到基于纯Br的钙钛矿中可以拓宽带隙，因而可通过调节Cl/Br 钙钛矿中 Cl 的含量来实现绿光到蓝光的调节" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "14", "type": "bibr", "rid": "R14", "data": [ { "name": "text", "data": "14" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。然而，在混合 Cl/Br 的PeLED中，尤其是Cl掺入量大的情况下，卤素很容易发生相分离，导致发射光谱不稳定" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "15", "type": "bibr", "rid": "R15", "data": [ { "name": "text", "data": "15" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。在外加偏压的情况下，“卤素偏析”现象不仅会导致器件的颜色纯度下降，还会引入更多的缺陷位点，这将对PeLED的效率和稳定性产生不利影响" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "16", "type": "bibr", "rid": "R16", "data": [ { "name": "text", "data": "16" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "20", "type": "bibr", "rid": "R20", "data": [ { "name": "text", "data": "20" } ] } } ], "rid": [ "R16", "R17", "R18", "R19", "R20" ], "text": "16-20", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。采用量子限域效应来拓宽带隙，被认为是不错的选择" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "21", "type": "bibr", "rid": "R21", "data": [ { "name": "text", "data": "21" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。其中，准二维MHP具有多量子阱结构，能让能量自发的从宽带隙量子阱快速的往窄带隙量子阱转移，显著提升激子结合能，从而极大的增强MHP室温下的发光性能，被认为是提升蓝光PeLED性能的有效方案" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "22", "type": "bibr", "rid": "R22", "data": [ { "name": "text", "data": "22" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。通过插入大的有机阳离子作为间隔层，可以在准二维钙钛矿中得到不同数量（n）的金属卤化物八面体层的相。n 值较小的相具有较大的带隙。因此，可以通过降低钙钛矿的 n 值来制备蓝光 PeLED。要形成小n值的相，通常需要添加大量的有机阳离子，这会造成两方面的问题。一个是有机阳离子本身的导电性是较差的，大量的有机阳离子会使得薄膜导电性变得很差，电荷难以注入" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "23", "type": "bibr", "rid": "R23", "data": [ { "name": "text", "data": "23" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。另一个是更容易形成n=1的相，而导致薄膜中存在严重的电子-声子耦合，这种非辐射复合过程，会极大的限制准二维器件效率的提升" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "24", "type": "bibr", "rid": "R24", "data": [ { "name": "text", "data": "24" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。在钙钛矿光伏领域，有机胍离子可以有效钝化钙钛矿表面和晶界缺陷，形成稳定钙钛矿的晶体结构，从而提高器件的光伏性能" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "25", "type": "bibr", "rid": "R25", "data": [ { "name": "text", "data": "25" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "26", "type": "bibr", "rid": "R26", "data": [ { "name": "text", "data": "26" } ] } } ], "rid": [ "R25", "R26" ], "text": "25-26", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。在钙钛矿量子点领域，有报道在量子点合成过程中引入溴化胍（GABr），实现光电性能提高和较好的环境稳定性" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "27", "type": "bibr", "rid": "R27", "data": [ { "name": "text", "data": "27" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "28", "type": "bibr", "rid": "R28", "data": [ { "name": "text", "data": "28" } ] } } ], "rid": [ "R27", "R28" ], "text": "27-28", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。" } ] }, { "name": "p", "data": [ { "name": "text", "data": "考虑到混合卤素比例和有机阳离子掺入量的问题，这里，作者首先在 CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ":PEABr 准二维钙钛矿中添加苯乙基氯化胺（PEACl）逐步替换苯乙基溴化胺（PEABr），在调节 Cl/Br 比例的同时实现准二维体系钙钛矿的调制，从而实现了发射波长从502 nm到476 nm的调控。然而薄膜中n = 1 低维相随着PEACl含量的增加而增多，导致器件效率降低。作者将GABr 引入到前驱液中，结果显示GABr的引入有效地抑制了n = 1 低维相的形成，减少了非辐射复合路径，实现了准二维蓝色 PeLED 性能的显著提升。最终作者实现了基于维度调制的准二维蓝色钙钛矿发光二极管制备。作者的工作为实现高效蓝光 PeLED 提供了新的思路。" } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "2　实 验" } ], "level": "1", "id": "s2" } }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "2.1　实验材料" } ], "level": "2", "id": "s2a" } }, { "name": "p", "data": [ { "name": "text", "data": "1,3,5-三(1-苯基-1H-苯并咪唑-2-基)苯（TPBi，99%）、二甲亚砜（DMSO，无水，99.9%）、乙醇胺（ETA，99.5%）和氟化锂（LiF，99.99%）购自上海 Aladdin 生化科技股份有限公司。溴化铯（CsBr，99.0%）、溴化铅（PbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "，99.0%）、苯乙基溴化胺（PEABr）、苯乙基氯化胺（PEACl）、溴化胍（GABr）和 PEDOT:PSS 4083 购自西安 p-OLED 光电科技有限公司。所有材料均未经其他处理直接使用。" } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "2.2　钙钛矿溶液制备" } ], "level": "2", "id": "s2b" } }, { "name": "p", "data": [ { "name": "text", "data": "准二维CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ":PEA（Br/Cl）钙钛矿前驱体溶液由0.2 M CsBr、0.2 M PbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": " 和 0.2 M PEACl:PEABr=0%、25%、50%、75%和 100%混合溶解于 DMSO 中配制而成。基于 GABr 添加的准二维 CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ":PEACl:GABr 钙钛矿前驱体溶液由 0.2 M CsBr、0.2 M PbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "、0.2 M PEACl 和不同添加比例的 GABr（0 mg/mL、4 mg/mL、8 mg/mL、12 mg/mL 和 16 mg/mL）混合溶解于 DMSO 中配制而成。此外，所有前驱体溶液在使用前置于加热板上 45 ℃加热 30 min。钙钛矿前驱体溶液的制备过程全程在 N" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": " 手套箱中完成。" } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "2.3　PeLED 器件制备" } ], "level": "2", "id": "s2c" } }, { "name": "p", "data": [ { "name": "text", "data": "分别使用去离子水（Deionized water）、异丙醇（IPA）和丙酮（Acetone）依次超声清洗 ITO 玻璃基底，清洗干净后放入烘烤箱中 90 ℃烘干。在旋涂空穴层材料之前，将 ITO 玻璃基底置于紫外臭氧清洗机清洗 30 min。空穴层由PEDOT:PSS 4083 溶液 （含 0.4 vol% ETA）以 4000 r/min 的速度旋涂并置于热板 150 ℃退火 20 min 制备而成， 随后将基底转移到 N" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": " 手套箱中。钙钛矿发光层由钙钛矿前驱体溶液在空穴层薄膜上以5000 r/min 的速度旋涂并置于热板 90 ℃退火 12 min 制备而成。最后，使用蒸镀仪依次蒸镀电子层 TPBi（48.5 nm）、电子注入层 LiF（1 nm）和阴极 Al（120 nm）。" } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "2.3　PeLED 器件表征" } ], "level": "2", "id": "s2d" } }, { "name": "p", "data": [ { "name": "text", "data": "通过 UV-VIS-NIR 分光光度计（Shimadzu，SolidSpec-3700）获得钙钛矿薄膜的紫外 -可见吸收光谱。钙钛矿薄膜的光致发光量子产率 （PLQY） 以及 PeLED 的电流-亮度-电压 （I-L-V）特性曲线均由电致发光 EL 测试系统（Enlitech，LQ-100）测量。" } ] } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "3　结果与讨论" } ], "level": "1", "id": "s3" } }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "3.1　基于混合卤素的准二维钙钛矿光电性能表征" } ], "level": "2", "id": "s3a" } }, { "name": "p", "data": [ { "name": "text", "data": "卤化物钙钛矿（CsPbX" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "）是一种广泛使用的全无机钙钛矿，其发光颜色可通过混合卤素调节。通过将卤化铯和卤化铅混合于前驱体溶液中，制备三维钙钛矿薄膜，同时保持其总摩尔含量，通过调节各卤素的摩尔比，从而控制其发光颜色。将PEABr 引入 CsPbX" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " 钙钛矿中是制备准二维钙钛矿薄膜的有效策略之一。到目前为止，准二维钙钛矿中不同 n 值的量子阱之间有效电荷转移使得基于 PEA 的准二维钙钛矿表现出一个单一的发射峰" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "29", "type": "bibr", "rid": "R29", "data": [ { "name": "text", "data": "29" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。然而，仅使用PEABr 添加的准二维钙钛矿不能很好的实现蓝光发射。因此，为了实现蓝光发射，作者通过添加 PEACl 逐步替换CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ":PEABr 钙钛矿体系中的 PEABr 进行实验探究。" } ] }, { "name": "p", "data": [ { "name": "text", "data": "为了探究钙钛矿薄膜的光学性质，作者基于 CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ":PEABr（0.2M:0.2M）钙钛矿体系，对不同 PEACl 替换比例（PEACl 与 PEABr 的摩尔比）的钙钛矿薄膜进行了紫外吸收光谱和光致发光测试。如" }, { "name": "xref", "data": { "text": "图 1", "type": "fig", "rid": "F1", "data": [ { "name": "text", "data": "图 1" } ] } }, { "name": "text", "data": "a 所示，随着 PEACl 比例的增加，发光光谱逐渐蓝移， PL 发射峰分别位于 503 nm（0%）、498 nm （25%）、492 nm （50%）、488 nm（75%）和 477 nm （100%），并且均具有较窄的发射光谱半峰宽（FWHM）（~24 nm），PL光谱由高n相和3D相决定。窄的发射半峰宽表明钙钛矿结构高度有序并具有低缺陷密度。相应的CIE坐标如" }, { "name": "xref", "data": { "text": "图1", "type": "fig", "rid": "F1", "data": [ { "name": "text", "data": "图1" } ] } }, { "name": "text", "data": "b 所示。" }, { "name": "xref", "data": { "text": "图1", "type": "fig", "rid": "F1", "data": [ { "name": "text", "data": "图1" } ] } }, { "name": "text", "data": "c 为紫外吸收光谱，在~393 nm、~419 nm 和~446 nm 处分别对应于 n 值为 1、2 和 3 的激子吸收峰。从图中可以看出薄膜中 n≥2 相的激子吸收随着 PEACl 比例的增加而逐渐减少， n = 1 的特征吸收峰则逐渐凸显，表明 n = 1 低维相的组分随着 PEACl 的引入而增加。然而，n = 1 相已被证明是由非辐射复合所主导的，这不利于激子的转移和利用。因此，为了提高效率，必须在准二维钙钛矿中抑制 n = 1 相的形成，这一点从 PLQY数据得以验证。如" }, { "name": "xref", "data": { "text": "图 1", "type": "fig", "rid": "F1", "data": [ { "name": "text", "data": "图 1" } ] } }, { "name": "text", "data": "d 所示，薄膜 PLQY 随着 PEACl 比例的增加而减小，这与n=1相比例增加和过多的Cl有关。" } ] }, { "name": "fig", "data": { "id": "F1", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "图 1" } ], "title": [ { "name": "text", "data": "不同 PEACl 替换比例条件下钙钛矿薄膜：（a） PL 光谱；（b）PL光谱对应的CIE坐标（c）紫外-吸收光谱；（d）PLQY 数据" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Fig.1" } ], "title": [ { "name": "text", "data": "Perovskite films at different PEACl replacement ratios. （a） PL spectra and （b） the corresponding CIE coordinate； （c） UV-absorption spectra； （d） PLQY data" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733434&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733436&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733435&type=", "width": "144.81500244", "height": "116.11699677", "fontsize": "" } ] } }, { "name": "p", "data": [ { "name": "xref", "data": { "text": "表 1", "type": "table", "rid": "T1", "data": [ { "name": "text", "data": "表 1" } ] } }, { "name": "text", "data": " 是不同 PEACl 替换比例条件下制备的 PeLED 的电致发光性能参数。PeLED器件结构如" }, { "name": "xref", "data": { "text": "图2", "type": "fig", "rid": "F2", "data": [ { "name": "text", "data": "图2" } ] } }, { "name": "text", "data": "a 所示（p-i-n 结构：" }, { "name": "italic", "data": [ { "name": "text", "data": "ITO/PEDOT:PSS/CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ":PEA(Br/Cl)/TPBi/LiF/Al" } ] }, { "name": "text", "data": "）。器件电致发光（EL）光谱如" }, { "name": "xref", "data": { "text": "图2", "type": "fig", "rid": "F2", "data": [ { "name": "text", "data": "图2" } ] } }, { "name": "text", "data": "b 所示，混合卤素实现准二维蓝光发射策略效果得以体现。器件 EL 光谱与钙钛矿薄膜 PL 光谱趋势一致，随着 PEACl 比例的增加 PeLED 有效实现了准二维绿光-蓝光 PeLED 的可调发射，EL 发射峰分别位于 502 nm（0%）、496 nm（25%）、492 nm（50%）、488 nm（75%）和 476 nm（100%），并且均拥有较窄的 FWHM，相应的CIE坐标如" }, { "name": "xref", "data": { "text": "图2", "type": "fig", "rid": "F2", "data": [ { "name": "text", "data": "图2" } ] } }, { "name": "text", "data": "c 所示。电流注入和亮度与 PEACl 比例的关系如" }, { "name": "xref", "data": { "text": "图2", "type": "fig", "rid": "F2", "data": [ { "name": "text", "data": "图2" } ] } }, { "name": "text", "data": "d 和 e 所示。PEACl 比例为 0%的器件电流注入最大，亮度最高（2884 cd/m" }, { "name": "sup", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "）。随着 PEACl 比例的增加，电流注入和亮度曲线呈现相同的下降趋势。" } ] }, { "name": "table", "data": { "id": "T1", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "表1" } ], "title": [ { "name": "text", "data": "CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "：PEA（Br/Cl） PeLED 器件电致发光参数" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Tab.1" } ], "title": [ { "name": "text", "data": "Electroluminescence parameters of CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "：PEA（Br/Cl） PeLED device" } ] } ], "note": [], "table": [ { "head": [ [ { "rowspan": "2", "align": "center", "style": "border-top:solid;border-bottom:solid;", "data": [ { "name": "text", "data": "PEACl" } ] }, { "align": "center", "style": "border-top:solid;border-bottom:solid;", "data": [ { "name": "text", "data": "V" }, { "name": "sub", "data": [ { "name": "text", "data": "on" } ] } ] }, { "align": "center", "style": "border-top:solid;border-bottom:solid;", "data": [ { "name": "text", "data": "Max.EQE" } ] }, { "align": "center", "style": "border-top:solid;border-bottom:solid;", "data": [ { "name": 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"text", "data": "ITO/PEDOT：PSS/CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "：PEA/TPBi/LiF/Al" } ] }, { "name": "text", "data": "）；（b） EL 光谱；（c） CIE 图；（d） 电流密度-电压 曲线；（e） 亮度-电压曲线" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Fig.2" } ], "title": [ { "name": "text", "data": "The EL performance of PeLED prepared under different PEACl substitution ratio.（a）device structure diagram（structure: " }, { "name": "italic", "data": [ { "name": "text", "data": "ITO/PEDOT: SS/CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ": PEA/TPBi/LiF/Al" } ] }, { "name": "text", "data": "）;（b）EL spectrum; （c）CIE diagram; （d）Current density-voltage curve; （e）Luminance - voltage curve" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733439&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733441&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733440&type=", "width": "115.07599640", "height": "70.41400146", "fontsize": "" } ] } }, { "name": "p", "data": [ { "name": "text", "data": "随着PEACl比例的增加，光谱逐渐发生蓝移，薄膜中的缺陷也随之增多。这在一定程度上阻碍了电荷传输和复合，导致器件电流注入和亮度降低，并且造成器件性能下降。这一点在器件发光效率数据（" }, { "name": "xref", "data": { "text": "图 3", "type": "fig", "rid": "F3", "data": [ { "name": "text", "data": "图 3" } ] } }, { "name": "text", "data": "）中得以体现。器件在 PEACl 比例为 0% 时效率最高（电流效率 CE" }, { "name": "sub", "data": [ { "name": "text", "data": "Max" } ] }, { "name": "text", "data": "=8.7 cd/A、功率效率 PE" }, { "name": "sub", "data": [ { "name": "text", "data": "Max" } ] }, { "name": "text", "data": "=6.9 lm/W、外量子效率 EQE" }, { "name": "sub", "data": [ { "name": "text", "data": "Max" } ] }, { "name": "text", "data": "=4.1%），随着 PEACl 比例的增加效率逐步下降，PEACl 比例为 100% 时效率最低（电流效率 CE" }, { "name": "sub", "data": [ { "name": "text", "data": "Max" } ] }, { "name": "text", "data": "=2.2 cd/A、功率效率 PE" }, { "name": "sub", "data": [ { "name": "text", "data": "Max" } ] }, { "name": "text", "data": "=1.7 lm/W、外量子效率 EQE" }, { "name": "sub", "data": [ { "name": "text", "data": "Max" } ] }, { "name": "text", "data": "=2.6%）。上述结果中作者发现，PEACl的引入会在一定程度上影响发光效率，但是在发光颜色方面能够实现绿色-蓝光的颜色调控。" } ] }, { "name": "fig", "data": { "id": "F3", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "图3" } ], "title": [ { "name": "text", "data": "不同 PEACl 替换比例条件下制备的 PeLED 的电致发光效率：（a） 电流效率（CE）-电流密度曲线；（b） 功率效率（PE）-电流密度曲线；（c） 外量子效率（EQE）-电流密度曲线" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Fig.3" } ], "title": [ { "name": "text", "data": "EL efficiency of PeLED prepared with different PEACl replacement ratios.（a）current efficiency（CE）-current density curve；（b）Power efficiency（PE）-current density curve；（c）External quantum efficiency（EQE）- current density curve" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733442&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733444&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733443&type=", "width": "141.44599915", "height": "45.75500107", "fontsize": "" } ] } } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "3.2　基于溴化胍添加的准二维钙钛矿光电性能表征" } ], "level": "2", "id": "s3b" } }, { "name": "p", "data": [ { "name": "text", "data": "在实验过程中作者发现，准二维钙钛矿中存在的强电子-声子耦合以及非辐射复合对准二维 PeLED 电致发光性能的影响。有机胍离子（GA" }, { "name": "sup", "data": [ { "name": "text", "data": "+" } ] }, { "name": "text", "data": "）含基团（-NH" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "）能与钙钛矿晶格上的卤化物阴离子（X）形成N-H…X氢键" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "27", "type": "bibr", "rid": "R27", "data": [ { "name": "text", "data": "27" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。在有效抑制非辐射复合的同时，GA" }, { "name": "sup", "data": [ { "name": "text", "data": "+" } ] }, { "name": "text", "data": "也可作为二维层状钙钛矿的“间隔层”，大尺寸有机阳离子的引入还可能带来缺陷钝化以及离子迁移的抑制效果，进一步提升器件性能" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "22", "type": "bibr", "rid": "R22", "data": [ { "name": "text", "data": "22" } ] } }, { "name": "text", "data": "," }, { "name": "xref", "data": { "text": "30", "type": "bibr", "rid": "R30", "data": [ { "name": "text", "data": "30" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。因此，为了在提高电致发光性能的同时实现准二维蓝光发射，作者将 GABr添加于上述 PEACl 100%添加条件下CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ":PEACl准二维蓝光钙钛矿中，尝试去调制钙钛矿相分布，使非辐射复合得到有效抑制，最终实现准二维蓝光 PeLED 性能的提升。" } ] }, { "name": "p", "data": [ { "name": "text", "data": "为了评估 GABr 添加对钙钛矿薄膜光学性能方面的影响，作者对钙钛矿薄膜进行了紫外可见吸收光谱和光致发光（PL）测试。" }, { "name": "xref", "data": { "text": "图4", "type": "fig", "rid": "F4", "data": [ { "name": "text", "data": "图4" } ] } }, { "name": "text", "data": "a 为添加不同比例的GABr后钙钛矿薄膜的吸收光谱，从结果可以看出GABr 添加后在~393 nm、~419 nm 和~446 nm 处具有分别对应于 n值为 1、2 和 3 的激子吸收峰，表明GABr 的添加没有破坏原来的准二维结构，依旧展现出典型的准二维钙钛矿的吸收特征。随着 GABr 的加入， n = 1 相激子吸收峰强度明显降低，而n = 3 相的激子吸收峰强度有所增强，说明准二维钙钛矿中 n = 1 相得到了有效的抑制。这不仅将带来非辐射复合的抑制效果，更有利于激子的转移，为器件效率的提高提供了可靠的基础" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "31", "type": "bibr", "rid": "R31", "data": [ { "name": "text", "data": "31" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。薄膜的PLQY变化如" }, { "name": "xref", "data": { "text": "图4", "type": "fig", "rid": "F4", "data": [ { "name": "text", "data": "图4" } ] } }, { "name": "text", "data": "b 所示，随着GABr 添加比例的增加，PLQY逐步增加，在 GABr 为 16 mg/mL 时 PLQY 达到最高。如" }, { "name": "xref", "data": { "text": "图4", "type": "fig", "rid": "F4", "data": [ { "name": "text", "data": "图4" } ] } }, { "name": "text", "data": "c 所示，PL发射峰分别位于 480 nm（0 mg/mL）、483 nm（4 mg/mL）、488 nm（8 mg/mL）、491 nm（12 mg/mL）和 493 nm（16 mg/mL），并且均拥有较窄的 FWHM（~24 nm），相应的 CIE 如" }, { "name": "xref", "data": { "text": "图4", "type": "fig", "rid": "F4", "data": [ { "name": "text", "data": "图4" } ] } }, { "name": "text", "data": "d 所示。可以看出由于 Br 比例的逐步增加与初始钙钛矿薄膜相比发射峰逐渐红移，但是依旧在蓝光范围之内。为此，作者分析引入GABr的作用如" }, { "name": "xref", "data": { "text": "图4", "type": "fig", "rid": "F4", "data": [ { "name": "text", "data": "图4" } ] } }, { "name": "text", "data": "e所示，当前驱液中只存在PEA阳离子时，由于大量的大体积的有机阳离子之间存在强的范德华相互作用，使得钙钛矿前驱体快速结晶而极易形成n=1的低维相。当引入GABr后，小体积的GA阳离子部分取代PEA阳离子，与PbX" }, { "name": "sub", "data": [ { "name": "text", "data": "6" } ] }, { "name": "text", "data": "八面体相互作用，减弱了PEA阳离子之间的相互作用，从而延缓了n=1相的形成" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "32", "type": "bibr", "rid": "R32", "data": [ { "name": "text", "data": "32" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": "。" } ] }, { "name": "fig", "data": { "id": "F4", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "图4" } ], "title": [ { "name": "text", "data": "不同 GABr 添加比例条件下钙钛矿薄膜：（a）紫外-可见吸收光谱；（b）PLQY 数据；（c）PL 光谱；（d）CIE 图；（e）GABr 添加作用的示意图" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Fig.4" } ], "title": [ { "name": "text", "data": "Perovskite films with different GABr ratios ：（a）UV-visible absorption spectrum；（b）PLQY data；（c）PL spectrum；（d）CIE diagram； （e） Schematic diagram of the role of GABr addition" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733445&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733447&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733446&type=", "width": "143.75700378", "height": "165.17100525", "fontsize": "" } ] } }, { "name": "p", "data": [ { "name": "xref", "data": { "text": "表2", "type": "table", "rid": "T2", "data": [ { "name": "text", "data": "表2" } ] } }, { "name": "text", "data": "是不同 GABr 添加比例条件下制备的 PeLED 的电致发光性能参数。如" }, { "name": "xref", "data": { "text": "图5", "type": "fig", "rid": "F5", "data": [ { "name": "text", "data": "图5" } ] } }, { "name": "text", "data": "a 所示，器件依旧采用 p-i-n 结构：" }, { "name": "italic", "data": [ { "name": "text", "data": "ITO/PEDOT:PSS/CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ":PEACl:GABr/TPBi/LiF/Al" } ] }, { "name": "text", "data": "。器件EL光谱如" }, { "name": "xref", "data": { "text": "图5", "type": "fig", "rid": "F5", "data": [ { "name": "text", "data": "图5" } ] } }, { "name": "text", "data": "b 所示，准二维蓝光 PeLED EL 光谱与钙钛矿薄膜 PL光谱趋势一致，EL 发射峰分别位于 476 nm（0 mg/mL）、480 nm（4 mg/mL）、488 nm（8 mg/mL）、492 nm（12 mg/mL）和 493 nm（16 mg/mL），并且均具有较窄的FWHM，实现了蓝光范围内准二维 PeLED 的可调发射，相应的 CIE 如" }, { "name": "xref", "data": { "text": "图5", "type": "fig", "rid": "F5", "data": [ { "name": "text", "data": "图5" } ] } }, { "name": "text", "data": "c 所示。GABr 的添加使得发光光谱红移以及薄膜中缺陷的减少，在一定程度上改善了电荷传输和复合，从而使器件电流注入和亮度随着 GABr 添加比例的增加而增加（" }, { "name": "xref", "data": { "text": "图5", "type": "fig", "rid": "F5", "data": [ { "name": "text", "data": "图5" } ] } }, { "name": "text", "data": "d 和 e）。" } ] }, { "name": "table", "data": { "id": "T2", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "表2" } ], "title": [ { "name": "text", "data": "CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "：PEACl：GABr PeLED 器件电致发光参数" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Tab.2" } ], "title": [ { "name": "text", "data": "Electroluminescence parameters of CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "：PEACl：GABr PeLED device" } ] } ], "note": [], "table": [ { "head": [ [ { "rowspan": "2", "align": "center", "style": "border-top:solid;border-bottom:solid;", "data": [ { "name": "text", "data": "GABr" } ] }, { "align": "center", "style": "border-top:solid;border-bottom:solid;", "data": [ { "name": "text", "data": "V" }, { "name": "sub", "data": [ { "name": "text", "data": "on" } ] } ] }, { "align": "center", "style": "border-top:solid;border-bottom:solid;", "data": [ { "name": "text", "data": "Max.EQE" } ] }, { "align": "center", "style": "border-top:solid;border-bottom:solid;", "data": [ { "name": "text", "data": "Max.CE" } ] }, { "align": "center", "style": "border-top:solid;border-bottom:solid;", "data": [ { "name": "text", "data": "Max.PE" } ] }, { "align": "center", "style": "border-top:solid;border-bottom:solid;", "data": [ { "name": "text", "data": "Max.L" } ] }, { "align": "center", "style": "border-top:solid;border-bottom:solid;", "data": [ { "name": "text", "data": "EL peak" } ] }, { "align": "center", "style": "border-top:solid;border-bottom:solid;", "data": [ { "name": "text", "data": "FWHM" } ] } ], [ { "align": "center", "style": "border-bottom:solid;", "data": [ { "name": "text", "data": "（V）" } ] }, { "align": "center", "style": "border-bottom:solid;", "data": [ { "name": "text", "data": "（%）" } ] }, { "align": "center", "style": "border-bottom:solid;", "data": [ { "name": "text", "data": "（cd/A）" } ] }, { "align": "center", "style": "border-bottom:solid;", "data": [ { "name": "text", "data": "（lm/W）" } ] }, { "align": "center", "style": "border-bottom:solid;", "data": [ { "name": "text", "data": "（cd/m" }, { "name": "sup", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "）" } ] }, { "align": "center", "style": "border-bottom:solid;", "data": [ { "name": "text", "data": "（nm）" } ] }, { "align": "center", "style": "border-bottom:solid;", "data": [ { "name": "text", "data": "（nm）" } ] } ] ], "body": [ [ { "align": "center", "data": [ { 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under the condition of the preparation of PeLED PeLED electroluminescent performance parameters：（a）device structure diagram（structure： " }, { "name": "italic", "data": [ { "name": "text", "data": "ITO/PEDOT： PSS/CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "： PEACl： GABr/TPBi/LiF/Al" } ] }, { "name": "text", "data": "）；（b）EL spectra；（c）CIE diagram；（d）Current density-voltage curve；（e）Luminance-voltage curve" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733450&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733452&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733451&type=", "width": "148.07800293", "height": "92.21600342", "fontsize": "" } ] } }, { "name": "p", "data": [ { "name": "text", "data": "器件效率如" }, { "name": "xref", "data": { "text": "图6", "type": "fig", "rid": "F6", "data": [ { "name": "text", "data": "图6" } ] } }, { "name": "text", "data": " 所示，随着GABr 添加比例的增加，器件效率随之增加，参考器件即无 GABr 添加时效率最低（电流效率 CE" }, { "name": "sub", "data": [ { "name": "text", "data": "Max" } ] }, { "name": "text", "data": "=2.2 cd/A、功率效率 PE" }, { "name": "sub", "data": [ { "name": "text", "data": "Max" } ] }, { "name": "text", "data": "=1.7 lm/W、外量子效率EQE" }, { "name": "sub", "data": [ { "name": "text", "data": "Max" } ] }, { "name": "text", "data": "=2.6%）。随着 GABr 比例的增加效率逐步上升，GABr 比例为 16 mg/mL 时效率最高，能够实现电流效率 CE" }, { "name": "sub", "data": [ { "name": "text", "data": "Max" } ] }, { "name": "text", "data": "=11.9 cd/A、功率效率PE" }, { "name": "sub", "data": [ { "name": "text", "data": "Max" } ] }, { "name": "text", "data": "=11.0 lm/W 和外量子效率 EQE" }, { "name": "sub", "data": [ { "name": "text", "data": "Max" } ] }, { "name": "text", "data": "=8.6%的高性能准二维天蓝光PeLED。对比纯PEA体系，发射峰位在493 nm附近时（50% PEACl），EQE仅有3%左右。作者进一步对50% PEACl和16 mg/mL GABr样品进行了薄膜形貌和晶体结构的表征。如" }, { "name": "xref", "data": { "text": "图7", "type": "fig", "rid": "F7", "data": [ { "name": "text", "data": "图7" } ] } }, { "name": "text", "data": "a和b所示，从扫描电子显微图(SEM)中可以看出两个样品之间的形貌差别不大。从x射线电子衍射图谱（XRD）（" }, { "name": "xref", "data": { "text": "图7", "type": "fig", "rid": "F7", "data": [ { "name": "text", "data": "图7" } ] } }, { "name": "text", "data": "c）中可以看出两个样品的结晶特性上相差不大，峰位基本一致。作者对两个样品组装的器件进行了运行稳定性的测试。结果如" }, { "name": "xref", "data": { "text": "图7", "type": "fig", "rid": "F7", "data": [ { "name": "text", "data": "图7" } ] } }, { "name": "text", "data": "d所示，50% PEACl样品在初始亮度为710 cd/m" }, { "name": "sup", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "时，器件亮度在10 s内就衰减了一半。而16 mg/mL GABr样品在初始亮度为830 cd/m" }, { "name": "sup", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "的情况下，器件亮度在28 s左右才衰减至一半。" } ] }, { "name": "fig", "data": { "id": "F6", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "图6" } ], "title": [ { "name": "text", "data": "不同 GABr 添加比例条件下制备的 PeLED 的电致发光效率参数：（a） 电流效率（CE）-电流密度曲线；（b） 功率效率（PE）-电流密度曲线；（c）外量子效率（EQE）-电流密度曲线" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Fig.6" } ], "title": [ { "name": "text", "data": "EL efficiency parameters of PeLED prepared with different GABr addition ratios.（a）current efficiency（CE）-current density curve；（b）Power efficiency（PE）-current density curve；（c）External quantum efficiency （EQE）- current density curve" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733453&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733455&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733454&type=", "width": "162.79998779", "height": "51.68757248", "fontsize": "" } ] } }, { "name": "fig", "data": { "id": "F7", "caption": [ { "lang": "zh", "label": [ { "name": "text", "data": "图7" } ], "title": [ { "name": "text", "data": "扫描电子显微图（a）50% PEACl样品；（b）16 mg/mL GABr样品；（c）x射线衍射图谱；（d）在恒定电流密度下（15 mA/cm" }, { "name": "sup", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "）器件的运行稳定性对比" } ] }, { "lang": "en", "label": [ { "name": "text", "data": "Fig.7" } ], "title": [ { "name": "text", "data": "Scanning electron micrographs of the perovskite film （a） 50% PEACl and （f） 16 mg/mL GABr sample； （c） X-ray diffraction spectra； （d） The comparison of the device operational stability under a constant current density of 15 mA/cm" }, { "name": "sup", "data": [ { "name": "text", "data": "2" } ] } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733456&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733458&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=40733457&type=", "width": "124.88300323", "height": "98.60099792", "fontsize": "" } ] } } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "4　结　　论" } ], "level": "1", "id": "s4" } }, { "name": "p", "data": [ { "name": "text", "data": "在本文中，作者基于维度调制实现了蓝钙钛矿发光二极管的制备。首先，作者基于 CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ":PEABr 准二维钙钛矿，添加PEACl 逐步替换 PEABr，在调节混合卤素 Cl/Br 比例的同时对准二维体系钙钛矿 n 值分布进行调制，从而实现准二维绿光-蓝光钙钛矿薄膜以及 PeLED 的发光颜色的调控。在此基础上作者将 GABr 引入到 CsPbBr" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ":PEACl准二维蓝光钙钛矿中，有效减少 PEA 体系 n = 1 低维相带来的负面影响，使非辐射复合得到有效抑制的同时实现准二维钙钛矿薄膜以及 PeLED 蓝光范围内的发射性能有效提升，为准二维蓝光钙钛矿提供了新的思路与解决方案。" } ] }, { "name": "p", "data": [ { "name": "text", "data": "本文（补充文件及）专家审稿意见和作者回复内容下载地址：" }, { "name": "extlink", "data": { "text": [ { "name": "text", "data": "http://cjl.lightpublishing.cn/thesisDetails#10.37188/CJL.20230004." } ], "href": 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