Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/61212
Title: Efficient and stable perovskite solar cells prepared in ambient air irrespective of the humidity
Authors: Tai, Q
You, P
Sang, H
Liu, Z
Hu, C
Chan, HLW 
Yan, F 
Issue Date: 2016
Publisher: Nature Publishing Group
Source: Nature communications, 2016, v. 7, 11105 How to cite?
Journal: Nature communications 
Abstract: Poor stability of organic-inorganic halide perovskite materials in humid condition has hindered the success of perovskite solar cells in real applications since controlled atmosphere is required for device fabrication and operation, and there is a lack of effective solutions to this problem until now. Here we report the use of lead (II) thiocyanate (Pb(SCN)2) precursor in preparing perovskite solar cells in ambient air. High-quality CH3NH3PbI3-x (SCN)x perovskite films can be readily prepared even when the relative humidity exceeds 70%. Under optimized processing conditions, we obtain devices with an average power conversion efficiency of 13.49% and the maximum efficiency over 15%. In comparison with typical CH3 NH3PbI3-based devices, these solar cells without encapsulation show greatly improved stability in humid air, which is attributed to the incorporation of thiocyanate ions in the crystal lattice. The findings pave a way for realizing efficient and stable perovskite solar cells in ambient atmosphere.
URI: http://hdl.handle.net/10397/61212
EISSN: 2041-1723
DOI: 10.1038/ncomms11105
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