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Melamine Hydroiodide Functionalized MAPbI 3 Perovskite with Enhanced Photovoltaic Performance and Stability in Ambient Atmosphere
Author(s) -
Yang Fu,
Kamarudin Muhammad A.,
Hirotani Daisuke,
Zhang Putao,
Kapil Gaurav,
Ng Chi Huey,
Ma Tingli,
Hayase Shuzi
Publication year - 2019
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201800275
Subject(s) - perovskite (structure) , materials science , halide , photovoltaic system , iodide , energy conversion efficiency , chemical engineering , melamine , nanotechnology , inorganic chemistry , chemistry , optoelectronics , composite material , engineering , biology , ecology
Despite the remarkable performance of organometallic halide perovskite solar cells (PSCs), their ultimate stability is still a major issue that inhibits the commercialization of this eminent technology. Herein, melamine hydroiodide (MLAI) is added to function methyl ammonium (CH3NH3 + , MA + ) lead iodide perovskite for fabricating structured perovskite with enhanced photovoltaic performance and stability in the harsh ambient atmosphere (35 °C, 60–70% relative humidity). Nearly no new phase formed even incorporated 25 mol.% MLAI induces the strain in the perovskite crystal structure. The MLAI‐structured perovskite film shows a denser and smoother surface than the pristine MAPbI 3 perovskite. Planar PSCs based on 2 mol.% MLAI‐functionalized perovskite show 17.2% power conversion efficiency with nearly no hysteresis which is much higher than pristine MAPbI 3 PSCs. Most importantly, the solar cell devices based on 2 mol.% MLAI‐functionalized perovskite still retain over 90% of the initial performance after being kept in ambient atmosphere for more than 560 h without encapsulation.