Synthesis and luminescence properties of lead-halide based organic-inorganic layered perovskite compounds (CnH2n+1NH3)2 PbI4 (n=4, 5, 7, 8 and 9)

被引：50
作者：
Kitazawa, Nobuaki [1 ]
Aono, Masami [1 ]
Watanabe, Yoshihisa [1 ]
机构：
[1] Natl Def Acad, Dept Mat Sci & Engn, Yokosuka, Kanagawa 2398686, Japan
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2011年 / 72卷 / 12期
关键词：
Quantum well; Chemical synthesis; Luminescence; Optical properties; OPTICAL-PROPERTIES; EXCITONS; CONVERSION;
D O I：
10.1016/j.jpcs.2011.08.029
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
This paper describes the synthesis and characterization of organic inorganic layered perovskite compounds, (CnH2n+1NH3)(2)PbI4 (n=4, 5, 7, 8 and 9). The effect of the number of carbon atoms on luminescence properties has been examined. Thin films of microcrystalline (CnH2n+1NH3)(2)PbI4 fabricated by spin-coating are highly oriented, with the c-axis perpendicular to the substrate surface. Temperature-dependent optical absorption spectra reveal that (CnH2n+1NH3)(2)PbI4 films (n = 4, 7, 8 and 9) show the structural phase transitions. The excitonic structures of (CnH2n+1NH3)(2)PbI4 vary with the number of carbon atoms of the alkyl chain length. At low temperatures below 100 K, the lowest-energy free-exciton band of (CnH2n+1NH3)(2)PbI4 (n = 7, 8 and 9) split into three fine-structure levels. In contrast to (CnH2n+1NH3)(2)PbBr4 films, (CnH2n+1NH3)(2)PbI4 (n = 7, 8 and 9) shows no triplet exciton emission, but it shows the Stokes-shifted emission from bound excitons. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1467 / 1471
页数：5
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