基于LiF修饰层的喷墨打印钙钛矿发光二极管

郑春波; 郑鑫; 冯晨; 倪梓全; 鞠松蔓; 李福山

doi:10.37188/CJL.20210058

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基于LiF修饰层的喷墨打印钙钛矿发光二极管

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- 基于LiF修饰层的喷墨打印钙钛矿发光二极管
- Inkjet Printed Perovskite Light-emitting Diode Based on LiF Modification Layer
- 发光学报 2021年42卷第5期页码：565-574
- 作者机构：
  
  福州大学　物理与信息工程学院，平板显示技术国家地方联合工程实验室，福建　福州　 350108
- 作者简介：
  
  [ "郑春波(1996-)，男，浙江宁波人，硕士研究生,2018年于绍兴文理学院获得学士学位，主要从事喷墨打印钙钛矿发光二极管的研究。E-mail: m18268557593@163.com" ]
  [ "李福山(1978-)，男，福建莆田人，博士，研究员，博士研究生导师,2005年于北京大学获得博士学位，主要从事纳米光电材料与器件的研究。E-mail: fsli@fzu.edu.cn", "青年编委介绍:", "李福山,《发光学报》第一届青年编委，博士，研究员，博士研究生导师，英国工程技术学会会士(IET Fellow)，福州大学量子点研究院院长，量子点发光与显示福建省高校重点实验室主任。2005年于北京大学获得理学博士学位。主要研究领域:纳米光电材料与器件。主要学术业绩:在量子点发光与显示技术方面取得了一系列成果，获得了国家重点研发计划、国家自然科学基金联合重点支持项目等立项支持，总经费超过1 000万元，发表学术专著1部，以第一/通讯作者身份在Nature Communications, Advanced Functional Materials, ACS Nano, Nano Energy等权威刊物发表论文100余篇，总引用次数2 200余次。获得中国发明专利授权20件。获得英国物理学会出版集团颁发的Top Cited Author Award。2016年获得福建省青年五四奖章。2019年当选英国工程技术学会会士。2019年获得福建省自然科学三等奖(第一完成人)。2019年指导博士学位论文入选中国电子教育学会优秀博士论文。" ]
- 基金信息：
  
  国家自然科学基金(62075043)
- DOI：10.37188/CJL.20210058
  中图分类号： TN312.8
- 纸质出版日期：2021-05-01，
  
  收稿日期：2021-02-09，
  
  修回日期：2021-02-23，
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郑春波, 郑鑫, 冯晨, 等. 基于LiF修饰层的喷墨打印钙钛矿发光二极管[J]. 发光学报, 2021,42(5):565-574.

Chun-bo ZHENG, Xin ZHENG, Chen FENG, et al. Inkjet Printed Perovskite Light-emitting Diode Based on LiF Modification Layer[J]. Chinese Journal of Luminescence, 2021,42(5):565-574.
郑春波, 郑鑫, 冯晨, 等. 基于LiF修饰层的喷墨打印钙钛矿发光二极管[J]. 发光学报, 2021,42(5):565-574. DOI： 10.37188/CJL.20210058.

Chun-bo ZHENG, Xin ZHENG, Chen FENG, et al. Inkjet Printed Perovskite Light-emitting Diode Based on LiF Modification Layer[J]. Chinese Journal of Luminescence, 2021,42(5):565-574. DOI： 10.37188/CJL.20210058.

摘要

金属卤化物钙钛矿材料由于具有高光致发光量子产率、高色纯度、带隙可调等优良光学性能，作为发光材料广泛用于制备钙钛矿电致发光二极管(PeLEDs)。虽然已经取得了较好的研究进展，但是其大面积商业化的进程还比较缓慢，尚需进一步研究。为了实现钙钛矿薄膜发光二极管的大面积制备，本文使用喷墨打印技术，研究了不同基板结构对于钙钛矿前驱液的铺展与结晶成膜的影响及器件性能的比较，引入了具有空穴阻挡能力的无机小分子材料氟化锂(LiF)作为缓冲层沉积于空穴传输层TFB上，获得了像素化的均匀分布的钙钛矿薄膜，从而得到发光均匀的最高亮度为4 861 cd/m

且最大电流效率为5.41 cd/A的印刷钙钛矿发光二极管。研究表明

LiF修饰层对于空穴的注入具有阻挡作用，并且有效阻止了钙钛矿发光层与TFB接触后所导致的激子猝灭现象。

Abstract

Metal halide perovskite materials are widely used as luminescent materials to prepare perovskite light-emitting diodes(PeLEDs) due to their outstanding optical properties such as high photoluminescence quantum yield

high color purity

and adjustable band gap. Although good research progress has been made

its large-scale preparation for commercialization is still very slow

and further efforts are needed. In order to realize the large-area preparation of perovskite thin film light-emitting diodes

this paper uses inkjet printing technology to study the influence of different substrate structures on the spreading and crystallization of the perovskite precursor liquid and the comparison of device performance. Then a kind of inorganic small molecule material lithium fluoride(LiF) with hole blocking ability was introduced as a buffer layer and deposited on TFB to obtain a pixelated and evenly distributed perovskite film

so that the highest brightness with uniform light emission was obtained. And we get a printed perovskite light-emitting diode with 4 861cd/m

and a maximum current efficiency of 5.41 cd/A. The studies showed that the LiF buffer layer has a certain blocking effect on the injection of holes

and effectively prevents the exciton quenching caused by the contact between the perovskite luminescent layer and the TFB after plasma treatment.

关键词

喷墨打印钙钛矿发光二极管电致发光基板修饰

Keywords

inkjet printingperovskite light-emitting diodeselectroluminescencesubstrate modification

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