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Extending the Lifetime of Perovskite Solar Cells using a Perfluorinated Dopant
Author(s) -
Salado Manuel,
Ramos F. Javier,
Manzanares Valentin M.,
Gao Peng,
Nazeeruddin Mohammad Khaja,
Dyson Paul J.,
Ahmad Shahzada
Publication year - 2016
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.201601030
Subject(s) - perovskite (structure) , iodide , dopant , materials science , photovoltaic system , energy conversion efficiency , salt (chemistry) , chemical engineering , photochemistry , inorganic chemistry , chemistry , organic chemistry , optoelectronics , doping , ecology , engineering , biology
Abstract The principle limitation of perovskite solar cells is related to their instability and, hence, their limited lifetime. Herein, we employ an imidazolium iodide dopant, 1‐methyl‐3‐(1H,1H,2H,2H‐nonafluorohexyl)‐imidazolium iodide, containing a perfluorous appendage, which leads to prolonged (unencapsulated, under Ar atmosphere) device activities exceeding 100 days without compromising the power conversion efficiency and other photovoltaic parameters. The extended lifetime of the device can be attributed, at least in part, to the hydrophobic nature of the imidazolium iodide salt. The functionalization of the perovskite material was found to have negligible influence on the perovskite crystal structure.