Open AccessEffects of Hydroiodic Acid Concentration on the Properties of CsPbI3 Perovskite Solar Cells
Author(s) -
Faiazul Haque,
Matthew Wright,
Md Arafat Mahmud,
Haimang Yi,
Dian Wang,
Leiping Duan,
Cheng Xu,
Mushfika Baishakhi Upama,
Ashraf Uddin
Publication year - 2018
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.8b01589
Subject(s) - perovskite (structure) , triiodide , band gap , materials science , caesium , tandem , phase (matter) , solar cell , chemistry , chemical engineering , mineralogy , inorganic chemistry , crystallography , optoelectronics , dye sensitized solar cell , organic chemistry , electrode , electrolyte , composite material , engineering
Inorganic cesium lead triiodide (CsPbI 3 ) perovskite materials are becoming increasingly attractive for use in perovskite/silicon tandem solar cells, due to their almost ideal band gap energy ( E g ) of about 1.7 eV. To be useful as photovoltaic absorbers, the CsPbI 3 must form the cubic or black phase (α-CsPbI 3 ). To do so at relatively low temperatures, hydroiodic acid (HI) is required as a solution additive. This paper demonstrates CsPbI 3 perovskite solar cells with an efficiency of 6.44%, formed using a HI concentration of 36 μL/mL. This value is higher than the previous most commonly used HI additive concentration. Herein, by undertaking a systematic study of the HI concentration, we demonstrate that the structural, morphological, optical, and electrical properties of CsPbI 3 solar cells, processed with this HI additive concentration, are superior.
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