Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
Volume 47 , Issue 6
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  • Xin Li, Xingyue Zhao, Youchen Gu, Xuewen Yin, Hui Nan, Meiqian Tai, Hu ...
    2018 Volume 47 Issue 6 Pages 817-820
    Published: June 05, 2018
    Released: June 05, 2018
    JOURNALS RESTRICTED ACCESS

    The hole extraction layer (HEL) plays a critical role in determining the charge extraction in inverted perovskite solar cells (PSCs) besides affecting the perovskite crystallization. Herein, we demonstrate efficient inverted perovskite solar cells based on solution-processed kesterite Cu2ZnSnS4 (CZTS) as the HEL for the first time. We achieved CZTS HEL with desired phase purity and optimal film coverage by optimizing the spin-coating process. Moreover, photoluminescence (PL) studies indicate that the CZTS HEL developed in this work provides superior hole extraction in comparison with the widely reported NiOx. This ultimately results in a respectable power conversion efficiency of 13.75% for the proof-of-concept device, reaching a level that is comparable to that of the NiOx-based device.

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