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Efficient Perovskite Solar Cells with Titanium Cathode Interlayer (Solar RRL 11∕2018)
Author(s) -
Chen Tao,
Shi Tongfei,
Li Xinhua,
Zheng Jianqiang,
Fan Weisheng,
Ni Bin,
Wang Yuqi,
Dai Jianming,
Xiao Zhengguo
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.201870226
Subject(s) - perovskite (structure) , cathode , materials science , layer (electronics) , thermal diffusivity , titanium , diffusion , energy conversion efficiency , metal , chemical engineering , inorganic chemistry , optoelectronics , nanotechnology , chemistry , metallurgy , physics , quantum mechanics , engineering , thermodynamics
In article no. 1800167 , Xinhua Li, Jianming Dai, Zhengguo Xiao, and co‐workers use an ultra‐thin Ti as a cathode interlayer, without using any organic or inorganic electron transport layers, to improve the efficiency of perovskite solar cells. Ti forms a bonding layer with nitrogen atoms in metylammonium anions at the perovskite/Ti interface, which passivates surface defects and suppresses surface decomposition of the perovskite film. A power conversion efficiency of 18.1% is achieved. Furthermore, Ti has low diffusivity and prevents the diffusion of the cathode metal atoms into the perovskite layer, resulting in improved device stability.