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1.泉州师范学院物理与信息工程学院 福建省先进微纳光子技术与器件重点实验室, 福建 泉州 362000
2.泉州师范学院 化工与材料学院, 福建 泉州 362000
[ "苏子生(1981-),男,福建闽清人,博士,教授,2009年于中国科学院长春光学精密机械与物理研究所获得博士学位,主要从事有机光电材料与器件的研究。Email: suzs@qztc. edu. cn" ]
[ "王丽丹(1981-),女,吉林省吉林市人,博士,副教授,2011年于中国科学院长春光学精密机械与物理研究所获得博士学位,主要从事纳米半导体材料与器件的研究。" ]
收稿日期:2022-03-26,
修回日期:2022-04-13,
纸质出版日期:2022-07-05
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苏子生,张璐,胡跃等.2D/3D混合Sn基钙钛矿/SnO2异质结光探测器[J].发光学报,2022,43(07):1121-1129.
SU Zi-sheng,ZHANG Lu,HU Yue,et al.Photodetectors Based on A 2D/3D Hybrid Tin Perovskite/SnO2 Heterojunction[J].Chinese Journal of Luminescence,2022,43(07):1121-1129.
苏子生,张璐,胡跃等.2D/3D混合Sn基钙钛矿/SnO2异质结光探测器[J].发光学报,2022,43(07):1121-1129. DOI: 10.37188/CJL.20220107.
SU Zi-sheng,ZHANG Lu,HU Yue,et al.Photodetectors Based on A 2D/3D Hybrid Tin Perovskite/SnO2 Heterojunction[J].Chinese Journal of Luminescence,2022,43(07):1121-1129. DOI: 10.37188/CJL.20220107.
制备了平面结构2D/3D混合钙钛矿(PEA)
0.15
FA
0.85
SnI
3
/SnO
2
异质结光探测器。研究发现,SnO
2
薄膜的引入可以调控(PEA)
0.15
FA
0.85
SnI
3
薄膜的晶体生长过程,有助于获得致密的连续薄膜。在520 nm单色光辐照下,器件的响应度高达3.19×10
5
A/W,相应的探测率为6.39×10
15
Jones。在808 nm单色光辐照下,器件的响应度和探测器率也可分别达到1.70×10
4
A/W和7.28×10
13
Jones。相关性能明显高于 (PEA)
0.15
FA
0.85
SnI
3
单层薄膜光探测器。器件性能的提高一方面是由于钙钛矿薄膜表面形貌的改善,提高了器件的吸收效率和载流子收集效率;另一方面是由于(PEA)
0.15
FA
0.85
SnI
3
和SnO
2
之间形成了p⁃n结结构,从而有效提高了钙钛矿薄膜中的光生电子⁃空穴对的分离效率,降低了电子和空穴的复合几率。同时,(PEA)
0.15
FA
0.85
SnI
3
/SnO
2
界面处特殊的能级结构也可诱导器件产生光电导增益。
Planar structure photodetector based on a 2D/3D hybrid perovskite (PEA)
0.15
FA
0.85
SnI
3
/SnO
2
heterojunction was constructed. It is found that the inserted SnO
2
layer can manipulate the crystal growth process of the (PEA)
0.15
FA
0.85
SnI
3
film, benefiting to form a dense and continued film. Under illumination of a 520 nm monochromatic light, the device shows a high response of 3.19×10
5
A/W, corresponding to a detectivity of 6.39×10
15
Jones. While under illumination of an 808 nm monochromatic light, the device also shows a response of 1.70×10
4
A/W and a detectivity of 7.28×10
13
Jones. These performances are dramatically higher than that device based on a simple (PEA)
0.15
FA
0.85
SnI
3
film.On the one hand, the improvements are attributed to the improved morphology of the perovskite film, which increases the absorption efficiency and charge carrier collection efficiency of the device;on the other hand, the formation of a p-n junction between (PEA)
0.15
FA
0.85
SnI
3
and SnO
2
effectively increases the dissociation efficiency of the photogenerated electron-hole pairs in the perovskite and decreases the recombination probability of the electrons and holes. Moreover, the special electronic structure at the (PEA)
0.15
FA
0.85
SnI
3
/SnO
2
interface may also trigger the device revealing a photoconduction gain.
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