Enhancing Light Outcoupling Efficiency via Anisotropic Low Refractive Index Electron Transporting Materials for Efficient Perovskite Light‐Emitting Diodes

Author:

Sun Shuang‐Qiao1,Tai Jing‐Wen1,He Wei1,Yu You‐Jun1,Feng Zi‐Qi1,Sun Qi2,Tong Kai‐Ning3,Shi Kefei3,Liu Bo‐Chen1,Zhu Min1,Wei Guodan3,Fan Jian1,Xie Yue‐Min14,Liao Liang‐Sheng12,Fung Man‐Keung12ORCID

Affiliation:

1. Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou Jiangsu 215123 P. R. China

2. Macau Institute of Materials Science and Engineering (MIMSE) MUST‐SUDA Joint Research Center for Advanced Functional Materials Zhuhai MUST Science and Technology Research Institute Macau University of Science and Technology Taipa Macau 999078 P. R. China

3. Institute of Materials Science Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen Guangdong 518055 P. R. China

4. Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow University Suzhou Jiangsu 215123 P.R. China

Abstract

AbstractThanks to the extensive efforts toward optimizing perovskite crystallization properties, high‐quality perovskite films with near‐unity photoluminescence quantum yield are successfully achieved. However, the light outcoupling efficiency of perovskite light‐emitting diodes (PeLEDs) is impeded by insufficient light extraction, which poses a challenge to the further advancement of PeLEDs. Here, an anisotropic multifunctional electron transporting material, 9,10‐bis(4‐(2‐phenyl‐1H‐benzo[d]imidazole‐1‐yl)phenyl) anthracene (BPBiPA), with a low extraordinary refractive index (ne) and high electron mobility is developed for fabricating high‐efficiency PeLEDs. The anisotropic molecular orientations of BPBiPA can result in a low ne of 1.59 along the z‐axis direction. Optical simulations show that the low ne of BPBiPA can effectively mitigate the surface plasmon polariton loss and enhance the photon extraction efficiency in waveguide mode, thereby improving the light outcoupling efficiency of PeLEDs. In addition, the high electron mobility of BPBiPA can facilitate balanced carrier injection in PeLEDs. As a result, high‐efficiency green PeLEDs with a record external quantum efficiency of 32.1% and a current efficiency of 111.7 cd A−1 are obtained, which provides new inspirations for the design of electron transporting materials for high‐performance PeLEDs.

Funder

Collaborative Innovation Center of Suzhou Nano Science and Technology

Higher Education Discipline Innovation Project

Publisher

Wiley

Cited by 18 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3