Efficient Blade‐Coated p–i–n Perovskite Solar Cells and Modules Enabled by Effective Molecular N Doping

Author:

Wang Feifei1,Shi Xiaoyu1,Yu Han1,Wang Lingyuan1,Ren Zhijun1,Chen Shangshang1ORCID

Affiliation:

1. State Key Laboratory of Coordination Chemistry MOE Key Laboratory of High Performance Polymer Materials & Technology School of Chemistry and Chemical Engineering Nanjing University Nanjing Jiangsu 210023 China

Abstract

AbstractN doping is an essential strategy to prolong electron diffusion length and improve the photovoltaic performance of p–i–n structured perovskite solar devices, but current n‐dopants generally suffer from air instability, poor compatibility with perovskites, and the compensation from perovskite intrinsic defects, thus limiting their doping effectiveness. To address these issues, in this work, a new perovskite n‐doping strategy is developed by incorporating an air‐stable n‐dopant (1‐ethyl‐3‐methylimidazolium‐2‐carboxylate, EMIC) that has no detrimental effects on perovskite crystallinity and morphology. EMIC is soluble in most polar solvents and can be readily introduced into perovskite precursor solutions. Upon thermal annealing of perovskite films, the decarboxylation of EMIC releases imidazolylidene, a reactive species that highly tends to donate electrons and thus efficiently prolongs the electron diffusion length from 0.57 µm to over 1.21 µm. As a result, the blade‐coated perovskite solar cells and modules realize high power conversion efficiencies of 24.3% and 20.6% at 7.4 mm2 and 25.0 cm2 aperture areas, respectively.

Funder

Fundamental Research Funds for the Central Universities

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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