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Enhanced Electrical Property of Compact TiO 2 Layer via Platinum Doping for High‐Performance Perovskite Solar Cells
Author(s) -
Jiang LuLu,
Wang ZhaoKui,
Li Meng,
Li ChunHe,
Fang PengFei,
Liao LiangSheng
Publication year - 2018
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.201800149
Subject(s) - materials science , perovskite (structure) , doping , hysteresis , energy conversion efficiency , optoelectronics , layer (electronics) , perovskite solar cell , titanium dioxide , electron mobility , open circuit voltage , platinum , planar , nanotechnology , chemical engineering , voltage , catalysis , composite material , electrical engineering , chemistry , computer science , physics , quantum mechanics , engineering , biochemistry , computer graphics (images)
The electron‐transporting layer (ETL) plays a critical role in improving the charge extraction and suppressing the carrier recombination in planar perovskite solar cells (PSCs). Compact titanium dioxide (TiO 2 ) film is a widely used as an ETL in conventional n‐i‐p PSCs. However, there is still much room for improvement in the electron mobility and reducing the oxygen vacancies of the compact TiO 2 film. Herein, Pt‐doped TiO 2 film with outstanding electron‐transporting property and complete coverage on the substrates is reported by the authors. Pt‐doping results in a tailed band level of TiO 2 , which could suppress the charge accumulation at the interface of TiO 2 ‐Pt/perovskite. Consequently, TiO 2 ‐Pt ETL based PSCs deliver a power conversion efficiency as high as 20.05% with an open‐circuit voltage of 1.15 V, a fill factor of 0.75, a short‐circuit current density of 23.83 mA cm −2 and remarkably alleviated hysteresis behavior.
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