Open AccessThe physics of photon induced degradation of perovskite solar cells
Author(s) -
Pranav Joshi,
Liang Zhang,
Istiaque Hossain,
Hisham A. Abbas,
Ranjith Kottokkaran,
S.P. Nehra,
M.S. Dhaka,
Max Noack,
Vikram L. Dalal
Publication year - 2016
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4967817
Subject(s) - trihalide , degradation (telecommunications) , perovskite (structure) , materials science , open circuit voltage , optoelectronics , capacitance , photovoltaic system , annealing (glass) , ion , short circuit , current density , voltage , chemical engineering , chemistry , inorganic chemistry , electrode , composite material , electronic engineering , physics , electrical engineering , organic chemistry , quantum mechanics , halide , engineering
Lead-trihalide perovskite solar cells are an important photovoltaic technology. We investigate the effect of light induced degradation on perovskite solar cells. During exposure, the open-circuit voltage (Voc) of the device increases, whereas the short-circuit current (Isc) shows a decrease. The degradation can be completely recovered using thermal annealing in dark. We develop a model based on light induced generation of ions and migration of these ions inside the material to explain the changes in Isc, Voc, capacitance and dark current upon light exposure and post-exposure recovery. There was no change in defect density in the material upon exposure
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