2D metal–organic framework for stable perovskite solar cells with minimized lead leakage

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Pages (from-to)934-940
Journal / PublicationNature Nanotechnology
Volume15
Issue number11
Online published21 Sep 2020
Publication statusPublished - Nov 2020

Abstract

Despite the notable progress in perovskite solar cells, maintaining long-term operational stability and minimizing potentially leaked lead (Pb2+) ions are two challenges that are yet to be resolved. Here we address these issues using a thiol-functionalized 2D conjugated metal–organic framework as an electron-extraction layer at the perovskite/cathode interface. The resultant devices exhibit high power conversion efficiency (22.02%) along with a substantially improved long-term operational stability. The perovskite solar cell modified with a metal–organic framework could retain more than 90% of its initial efficiency under accelerated testing conditions, that is continuous light irradiation at maximum power point tracking for 1,000 h at 85 °C. More importantly, the functionalized metal–organic framework could capture most of the Pb2+ leaked from the degraded perovskite solar cells by forming water-insoluble solids. Therefore, this method that simultaneously tackles the operational stability and lead contamination issues in perovskite solar cells could greatly improve the feasibility of large-scale deployment of perovskite photovoltaic technology.

Citation Format(s)

2D metal–organic framework for stable perovskite solar cells with minimized lead leakage. / Wu, Shengfan; Li, Zhen; Li, Mu-Qing; Diao, Yingxue; Lin, Francis; Liu, Tiantian; Zhang, Jie; Tieu, Peter; Gao, Wenpei; Qi, Feng; Pan, Xiaoqing; Xu, Zhengtao; Zhu, Zonglong; Jen, Alex K.-Y.

In: Nature Nanotechnology, Vol. 15, No. 11, 11.2020, p. 934-940.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review