Light-activated photocurrent degradation and self-healing in perovskite solar cells

Wanyi Nie, Jean-Christophe Blancon, Amanda J. Neukirch, Kannatassen Appavoo, Hsinhan Tsai, Manish Chhowalla, Muhammad A. Alam, Matthew Y. Sfeir, Claudine Katan, Jacky Even, Sergei Tretiak, Jared J. Crochet, Gautam Gupta and Aditya D. Mohite ()
Additional contact information
Wanyi Nie: Los Alamos National Laboratory
Jean-Christophe Blancon: Los Alamos National Laboratory
Amanda J. Neukirch: Los Alamos National Laboratory
Kannatassen Appavoo: Center for Functional Nanomaterials, Brookhaven National Laboratory
Hsinhan Tsai: Los Alamos National Laboratory
Manish Chhowalla: Rutgers University
Muhammad A. Alam: School of Electrical and Computer Engineering, Purdue University
Matthew Y. Sfeir: Center for Functional Nanomaterials, Brookhaven National Laboratory
Claudine Katan: Institut des Sciences Chimiques de Rennes
Jacky Even: Fonctions Optiques pour les Technologies de l'Information
Sergei Tretiak: Los Alamos National Laboratory
Jared J. Crochet: Los Alamos National Laboratory
Gautam Gupta: Los Alamos National Laboratory
Aditya D. Mohite: Los Alamos National Laboratory

Nature Communications, 2016, vol. 7, issue 1, 1-9

Abstract: Abstract Solution-processed organometallic perovskite solar cells have emerged as one of the most promising thin-film photovoltaic technology. However, a key challenge is their lack of stability over prolonged solar irradiation. Few studies have investigated the effect of light soaking on hybrid perovskites and have attributed the degradation in the optoelectronic properties to photochemical or field-assisted ion migration. Here we show that the slow photocurrent degradation in thin-film photovoltaic devices is due to the formation of light-activated meta-stable deep-level trap states. However, the devices can self-heal completely by resting them in the dark for

Date: 2016
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DOI: 10.1038/ncomms11574

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