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Title: Giant switchable photovoltaic effect in organometal trihalide perovskite devices

Organolead trihalide perovskite (OTP) materials are emerging as naturally abundant materials for low-cost, solution-processed and highly efficient solar cells. Here, we show that, in OTP-based photovoltaic devices with vertical and lateral cell configurations, the photocurrent direction can be switched repeatedly by applying a small electric field of <1 V μm–1. The switchable photocurrent, generally observed in devices based on ferroelectric materials, reached 20.1 mA cm–2 under one sun illumination in OTP devices with a vertical architecture, which is four orders of magnitude larger than that measured in other ferroelectric photovoltaic devices. This field-switchable photovoltaic effect can be explained by the formation of reversible p–i–n structures induced by ion drift in the perovskite layer. Furthermore, the demonstration of switchable OTP photovoltaics and electric-field-manipulated doping paves the way for innovative solar cell designs and for the exploitation of OTP materials in electrically and optically readable memristors and circuits.
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  1. Univ. of Nebraska, Lincoln, NE (United States)
Publication Date:
OSTI Identifier:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Nature Materials
Additional Journal Information:
Journal Volume: 14; Journal Issue: 2; Journal ID: ISSN 1476-1122
Nature Publishing Group
Research Org:
Univ. of Nebraska, Lincoln, NE (United States)
Sponsoring Org:
Country of Publication:
United States
solar cells