Light-activated photocurrent degradation and self-healing in perovskite solar cells [electronic resource]
Solution-processed organometallic perovskite solar cells have emerged as one of the most promising thin-film photovoltaic technology. But, 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...
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| Online Access: |
Online Access (via OSTI) |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy. Office of Basic Energy Sciences ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
2016.
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| Subjects: |
| Summary: | Solution-processed organometallic perovskite solar cells have emerged as one of the most promising thin-film photovoltaic technology. But, 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. 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 <1 min or the degradation can be completely prevented by operating the devices at 0 °C. Here, we investigate several physical mechanisms to explain the microscopic origin for the formation of these trap states, among which the creation of small polaronic states involving localized cooperative lattice strain and molecular orientations emerges as a credible microscopic mechanism requiring further detailed studies. Center For Functional Nanomaterials. |
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| Item Description: | Published through SciTech Connect. 05/16/2016. "bnl--112600-2016-ja" "KC0403020" Nature Communications 7 ISSN 2041-1723 AM. 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; Aditya D. Mohite. |
| Physical Description: | Article No. 11574 : digital, PDF file. |