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Thermochromic halide perovskite solar cells
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Number of Authors: 142018 (English)In: Nature Materials, ISSN 1476-1122, E-ISSN 1476-4660, Vol. 17, no 3, p. 261-267Article in journal (Refereed) Published
Abstract [en]

Smart photovoltaic windows represent a promising green technology featuring tunable transparency and electrical power generation under external stimuli to control the light transmission and manage the solar energy. Here, we demonstrate a thermochromic solar cell for smart photovoltaic window applications utilizing the structural phase transitions in inorganic halide perovskite caesium lead iodide/bromide. The solar cells undergo thermally-driven, moisture-mediated reversible transitions between a transparent non-perovskite phase (81.7% visible transparency) with low power output and a deeply coloured perovskite phase (35.4% visible transparency) with high power output. The inorganic perovskites exhibit tunable colours and transparencies, a peak device efficiency above 7%, and a phase transition temperature as low as 105 degrees C. We demonstrate excellent device stability over repeated phase transition cycles without colour fade or performance degradation. The photovoltaic windows showing both photoactivity and thermochromic features represent key stepping-stones for integration with buildings, automobiles, information displays, and potentially many other technologies.

Place, publisher, year, edition, pages
2018. Vol. 17, no 3, p. 261-267
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Chemical Sciences Materials Engineering Physical Sciences
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URN: urn:nbn:se:su:diva-154829DOI: 10.1038/s41563-017-0006-0ISI: 000426012000016PubMedID: 29358645OAI: oai:DiVA.org:su-154829DiVA, id: diva2:1196733
Available from: 2018-04-11 Created: 2018-04-11 Last updated: 2018-04-11Bibliographically approved

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Sun, JunliangHawks, Steven A.
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