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Stable and Low‐Cost Mesoscopic CH 3 NH 3 PbI 2 Br Perovskite Solar Cells by using a Thin Poly(3‐hexylthiophene) Layer as a Hole Transporter
Author(s) -
Zhang Meng,
Lyu Miaoqiang,
Yu Hua,
Yun JungHo,
Wang Qiong,
Wang Lianzhou
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201404427
Subject(s) - materials science , perovskite (structure) , mesoscopic physics , energy conversion efficiency , fabrication , photovoltaic system , layer (electronics) , bromine , thin film , optoelectronics , solid state , chemical engineering , nanotechnology , chemistry , electrical engineering , medicine , physics , alternative medicine , pathology , quantum mechanics , engineering , metallurgy
Mesoscopic perovskite solar cells using stable CH 3 NH 3 PbI 2 Br as a light absorber and low‐cost poly(3‐hexylthiophene) (P3HT) as hole‐transporting layer were fabricated, and a power conversion efficiency of 6.64 % was achieved. The partial substitution of iodine with bromine in the perovskite led to remarkably prolonged charge carrier lifetime. Meanwhile, the replacement of conventional thick spiro‐MeOTAD layer with a thin P3HT layer has significantly reduced the fabrication cost. The solar cells retained their photovoltaic performance well when they were exposed to air without any encapsulation, presenting a favorable stability. The combination of CH 3 NH 3 PbI 2 Br and P3HT may render a practical and cost‐effective solid‐state photovoltaic system. The superior stability of CH 3 NH 3 PbI 2 Br is also promising for other photoconversion applications.