电子传输层对用于光伏应用的无铅钙钛矿（CH3NH3）3 Bi2I9 的影响。

Effect of Electron Transporting Layer on Bismuth-Based Lead-Free Perovskite (CH3NH3)3 Bi2I9 for Photovoltaic Applications.

机构信息

Graduate School of Engineering, Toin University of Yokohama , 1614 Kuroganecho, Aoba, Yokohama 225-8503, Japan.

出版信息

ACS Appl Mater Interfaces. 2016 Jun 15;8(23):14542-7. doi: 10.1021/acsami.6b02843. Epub 2016 Jun 2.

Abstract

Methylammonium iodo bismuthate ((CH3NH3)3Bi2I9) (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)3Bi2I9), whose morphology was influenced drastically by the nature of substrates. 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.

摘要

甲脒碘化铊铋（(CH3NH3)3Bi2I9）（MBI）钙钛矿作为一种很有前途的替代物，正在迅速发展的混合有机-无机铅钙钛矿，因为它具有更好的稳定性和低毒性相比，基于铅的钙钛矿。通过单步旋涂和后续加热制备的溶液处理钙钛矿，制备了混合钙钛矿（CH3NH3）3Bi2I9）的多晶薄膜，其形态受到衬底性质的强烈影响。光学测量显示在 500nm 左右有很强的吸收带。在锐钛矿 TiO2 介孔层上制作的器件表现出良好的性能，电流密度超过 0.8mAcm(-2)，而在板钛矿 TiO2 层和平面（无多孔层）上的器件效率较低。然而，所有的 MBI 器件在环境条件下稳定超过 10 周。