Optical properties of CH3NH3PbX3 (X = halogen) and their mixed-halide crystals

被引:288
作者
Kitazawa, N [1 ]
Watanabe, Y [1 ]
Nakamura, Y [1 ]
机构
[1] Natl Def Acad, Dept Mat Sci & Engn, Kanagawa 2398686, Japan
关键词
D O I
10.1023/A:1016584519829
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Thin films of microcrystalline CH3NH3PbX3 (X = halogen) as well as their mixed-halide crystals were fabricated by the spin-coating technique, and their optical properties were investigated. X-ray diffraction investigation revealed that CH3NH3PbBr3 - x Cl-x (x = 0-3) were successfully formed on glass substrate self-assembly and oriented with the a-axis. Owing to due to their large exciton binding energy, these materials showed clear exciton absorption and free-exciton emission in the visible region at room temperature. Replacing Br with CI made it possible to control the band structure of these materials. As a result, the peak position of the exciton band shifted continuously towards blue region with increasing the CI content in the films. (C) 2002 Kluwer Academic Publishers.
引用
收藏
页码:3585 / 3587
页数:3
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