Journal
APPLIED PHYSICS LETTERS
Volume 105, Issue 18, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4901510
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Funding
- National Science Foundation [NSF-ECCS 1202231]
- Air Force Office of Scientific Research [FA9550-12-1-0074]
- UCLA internal funds
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1202231] Funding Source: National Science Foundation
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Moisture is assumed to be detrimental to organometal trihalide perovskite, as excess water can damage the crystallinity of the perovskite structure. Here, we report a growth mode for via thermal annealing of the perovskite precursor film in a humid environment (e. g., ambient air) to greatly improve the film quality, grain size, carrier mobility, and lifetime. Our method produces devices with maximum power conversion efficiency of 17.1% and a fill factor of 80%, revealing a promising route to achieve high quality perovskite polycrystalline films with superior optoelectronic properties that can pave the way towards efficient photovoltaic conversion. (C) 2014 AIP Publishing LLC.
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