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Towards Extending Solar Cell Lifetimes: Addition of a Fluorous Cation to Triple Cation‐Based Perovskite Films
Author(s) -
Salado Manuel,
Fernández M. Asunción,
Holgado Juan P.,
Kazim Samrana,
Nazeeruddin Mohammad Khaja,
Dyson Paul J.,
Ahmad Shahzada
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201700797
Subject(s) - formamidinium , perovskite (structure) , caesium , perovskite solar cell , solar cell , energy conversion efficiency , fabrication , materials science , chemical engineering , chemistry , nanotechnology , inorganic chemistry , organic chemistry , optoelectronics , medicine , alternative medicine , pathology , engineering
Organohalide perovskites have emerged as highly promising replacements for thin‐film solar cells. However, their poor stability under ambient conditions remains problematic, hindering commercial exploitation. The addition of a fluorous‐functionalized imidazolium cation during the preparation of a highly stable cesium‐based mixed perovskite material Cs 0.05 (MA 0.15 FA 0.85 ) 0.95 Pb(I 0.85 Br 0.15 ) 3 (MA=methylammonium; FA=formamidinium) has been shown to influence its stability. The resulting materials, which vary according to the amount of the fluorous‐functionalized imidazolium cation present during fabrication, display a prolonged tolerance to atmospheric humidity (>100 days) along with power conversion efficiencies exceeding 16 %. This work provides a general route that can be implemented in a variety of perovskites and highlights a promising way to increase perovskite solar cell stability.