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Photovoltaic Performance of Perovskite Solar Cells with Different Grain Sizes
Author(s) -
Kim Hyung Do,
Ohkita Hideo,
Benten Hiroaki,
Ito Shinzaburo
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201504144
Subject(s) - materials science , photovoltaic system , perovskite (structure) , grain size , photovoltaics , engineering physics , optoelectronics , nanotechnology , chemical engineering , composite material , electrical engineering , engineering
Perovskite solar cells exhibit improved photovoltaic parameters with increasing perovskite grain size. The larger photocurrent is due to the enhanced absorption efficiency for thicker perovskite layers. The larger open‐circuit voltage ( V OC ) is ascribed to the reduced trap‐assisted recombination for the larger grains. As a result, the power conversion efficiency exceeds 19% at best. Further improvement in V OC would be possible if the trap density were reduced.