Effect of Electron Transporting Layer on Bismuth-Based Lead-Free Perovskite (CH3NH3)3 Bi2I9 for Photovoltaic Applications
Effect of Electron Transporting Layer on Bismuth-Based Lead-Free Perovskite (CH3NH3)3 Bi2I9 for Photovoltaic Applications
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DOI：
10.1021/acsami.6b02843
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发表时间：
2016-06-15
影响因子：
9.5
通讯作者：
Miyasaka, Tsutomu
中科院分区：
文献类型：
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作者：
Singh, Trilok;Kulkarni, Ashish;Miyasaka, Tsutomu
甲基碘铋酸铵 ((CH3NH3)(3)Bi-2-I-9) (MBI) 钙钛矿是快速发展的杂化有机无机铅钙钛矿的有前途的替代品，因为与铅基钙钛矿相比，它具有更好的稳定性和低毒性。通过一步旋涂和随后的加热制备溶液处理的钙钛矿，产生杂化钙钛矿(CH3NH3)(3)Bi-2-I-9的多晶薄膜，其形貌受到基底性质的极大影响。光学测量显示500 nm 附近有强吸收带。在锐钛矿型TiO2介孔层上制作的器件在电流密度超过0.8 mA cm(-2)时表现出良好的性能，而在板钛矿型TiO2层和平面（无多孔层）上制作的器件效率较低。然而，所有 MBI 设备在环境条件下都能保持稳定 10 周以上。
Methylaminonium iodo bismuthate ((CH3NH3)(3)Bi-2-I-9) (MBI) perovskite is a promising alternative to rapidly progressing hybrid organic inorganic lead perovskites because of its better stability and low toxicity compared to lead-based perovskites. Solution-processed perovskite fabricated by single-step spin-coating and subsequent heating produced polycrystalline films of hybrid perovskite (CH3NH3)(3)Bi-2-I-9, whose morphology was influenced drastically by the nature of substrate's. The optical measurements showed a strong absorption band around 500 nm. The devices made on anatase TiO2 mesoporous layer showed good performance with current density over 0.8 mA cm(-2) while the devices on brookite TiO2 layer and planar (free of porous layer) was inefficient. However, all the MBI devices were stable to ambient conditions for more than 10 weeks.