Triple cathode buffer layers composed of PCBM, C60, and LiF for high-performance planar perovskite solar cells

ACS Applied Materials & Interfaces
Xiaodong LiuYongfang Li

Abstract

In this paper, triple cathode buffer layers (CBLs) composed of phenyl-C61-butyric acid methyl ester (PCBM), C60, and LiF layers were introduced into the planar p-i-n perovskite solar cells (p-i-n PSCs) with a device structure of ITO/PEDOT:PSS/CH3NH3PbI3-xClx/CBLs/Al. For comparison, a single CBL of PCBM and a double CBL of PCBM/LiF were also investigated in the p-i-n PSCs. On the basis of the PCBM buffer layer, the addition of a thin LiF layer facilitated the charge collection process and led to the dramatic improvement of the power conversion efficiency (PCE) of the PSCs up to 14.69% under an illumination of AM 1.5G, 100 mW/cm(2), which is to date one of the highest efficiencies of the p-i-n PSCs. By further insertion of a C60 layer between PCBM and LiF in the triple CBLs, a PCE of 14.24% was obtained, and more importantly, the PCBM/C60/LiF triple CBLs are very helpful for improving the stability of the devices and making the LiF layer less thickness-sensitive for achieving high performances of the p-i-n PSCs.

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Citations

Dec 4, 2015·ACS Applied Materials & Interfaces·Jiang-Jun LiLi-Jun Wan
Nov 26, 2015·Journal of the American Chemical Society·Yaowen LiYang Yang
Oct 25, 2016·Advanced Science·Xin TongZhiming M Wang
Sep 24, 2015·Physical Chemistry Chemical Physics : PCCP·Da-Xing YuanLiang-Sheng Liao
Apr 28, 2016·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Hao HuLukas Schmidt-Mende
Jun 18, 2016·ACS Applied Materials & Interfaces·Tiantian CaoYongfang Li
Aug 31, 2016·ACS Applied Materials & Interfaces·Hsi-Kuei LinKung-Hwa Wei
Jan 5, 2017·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Jiang LiuJun Mei
Jul 1, 2017·Physical Chemistry Chemical Physics : PCCP·Abdullah Al MamunGon Namkoong
Aug 14, 2019·Advanced Materials·Biao ShiXiaodan Zhang
Jun 12, 2019·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Ramireddy RajeswariLingamallu Giribabu
Feb 3, 2021·ACS Applied Materials & Interfaces·Yi Kai WangYongfang Li
Jul 22, 2020·ACS Applied Materials & Interfaces·Bairu LiShangfeng Yang

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