Affiliation:
1. Guangxi Key Laboratory of Optical and Electronic Material and Devices School of Materials Science and Engineering Guilin University of Technology 12 Jiangan Road Guilin Guangxi 541004 P. R. China
2. Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources Guilin University of Technology 12 Jiangan Road Guilin Guangxi 541004 P. R. China
3. State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 P. R. China
Abstract
AbstractPoor carrier transport capacity and numerous surface defects of charge transporting layers (CTLs), coupled with misalignment of energy levels between perovskites and CTLs, impact photoelectric conversion efficiency (PCE) of inverted perovskite solar cells (PSCs) profoundly. Herein, a collaborative passivation strategy is proposed based on 4‐(chloromethyl) benzonitrile (CBN) as a solution additive for fabrication of both [6,6]‐phenyl‐C61‐butyric acid methylester (PCBM) and poly(triarylamine) (PTAA) CTLs. This additive can improve wettability of PTAA and reduce the agglomeration of PCBM particles, which enhance the PCE and device stability of the PSCs. As a result, a PCE exceeding 20% with a remarkable short circuit current of 23.9 mA cm−2, and an improved fill factor of 81% is obtained for the CBN‐ modified inverted PSCs. Devices maintain 80% and 70% of the initial PCE after storage under 30% and 85% humidity ambient conditions for 1000 h without encapsulation, as well as negligible light state PCE loss. This strategy demonstrates feasibility of the additive engineering to improve interfacial contact between the CTLs and perovskites for fabrication of efficient and stable inverted PSCs.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Guangxi Province
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
5 articles.
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