MXene-Modulated Electrode/SnO<sub>2</sub> Interface Boosting Charge Transport in Perovskite Solar Cells

Yunfan Wang(Sichuan University), Pan Xiang(University of Electronic Science and Technology of China), Aobo Ren(University of Electronic Science and Technology of China), Huagui Lai(Sichuan University), Zhuoqiong Zhang(Hong Kong Baptist University), Zhipeng Xuan(Sichuan University), Zhenxi Wan(Sichuan University), Jingquan Zhang(Sichuan University), Xia Hao(Sichuan University), Lili Wu(Sichuan University), Masakazu Sugiyama(The University of Tokyo), Udo Schwingenschlögl(King Abdullah University of Science and Technology), Cai Liu(Southern University of Science and Technology), Zeguo Tang(Shenzhen Technology University), Jiang Wu(University of Electronic Science and Technology of China), Zhiming Wang(University of Electronic Science and Technology of China), Dewei Zhao(Sichuan University)
ACS Applied Materials & Interfaces
November 17, 2020
10.1021/acsami.0c17338
Cited by 106

Abstract

Interface engineering is imperative to boost the extraction capability in perovskite solar cells (PSCs). We propose a promising approach to enhance the electron mobility and charge transfer ability of tin oxide (SnO2) electron transport layer (ETL) by introducing a two-dimensional carbide (MXene) with strong interface interaction. The MXene-modified SnO2 ETL also offers a preferable growth platform for perovskite films with reduced trap density. Through a spatially resolved imaging technique, profoundly reduced non-radiative recombination and charge transport losses in PSCs based on MXene-modified SnO2 are also observed. As a result, the PSC achieves an enhanced efficiency of 20.65% with ultralow saturated current density and negligible hysteresis. We provide an in-depth mechanistic understanding of MXene interface engineering, offering an alternative approach to obtain efficient PSCs.

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