Thin films of microcrystalline (CH3NH3)(C6H5C2H4NH3)2Pb2Br7 and related compounds:: fabrication and optical properties

被引：15
|
作者：
Kashiwamura, S [1 ]
Kitazawa, N [1 ]
机构：
[1] Natl Def Acad, Dept Mat Sci & Engn, Kanagawa 2398686, Japan
来源：
SYNTHETIC METALS | 1998年 / 96卷 / 02期
关键词：
layered perovskite; excitons; absorption; luminescence; optical properties; thin films;
D O I：
10.1016/S0379-6779(98)00075-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Thin films of microcrystalline (CH3NH3)(C6H5C2H4NH3)(2)Pb2Br7 and related compounds were prepared by the spin-coating method from their DMF solutions. It was essential to use precursor solutions dissolved with excess amount of CH,NH,Br for preparing (CH3NH3)(C6H5C2H4NH3)(2)Pb2Br7 film. The substrate surface temperature and coating atmosphere also affected the thin film formation. (CH3NH3)(m - 1)(C6H5C2H4NH3)(2)PbmBr3m + 1 (m = 1, 2 and infinity) films showed clear exciton absorption and free exciton emission at room temperature due to their large exciton binding energy. The unknown film synthesized here showed no exciton band; however, this film exhibited clear blue-green emission from the band edge. (C) 1998 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：133 / 136
页数：4
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