DIELECTRIC STUDY OF CH3NH3PBX3 (X=CL, BR, I)

被引：353

作者：

ONODAYAMAMURO, N ^{[1
]}

MATSUO, T ^{[1
]}

SUGA, H ^{[1
]}

机构：

[1] OSAKA UNIV,FAC SCI,MICROCALORIMETRY RES CTR,TOYONAKA,OSAKA 560,JAPAN

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1992年 / 53卷 / 07期

关键词：

DIELECTRIC PERMITTIVITY; RELAXATION TIME; METHYLAMMONIUM TRIHALOGENOPLUMBATE(II); PHASE TRANSITION; ORIENTATIONAL DISORDER;

D O I：

10.1016/0022-3697(92)90121-S

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Complex dielectric permittivities of CH3NH3PbX3 (X = Cl, Br, I) were measured at frequencies between 20 Hz and 1 MHz and at temperatures between 20 and 300 K (15 and 350 K for the iodide). Discontinuities or a sharp bend of the real part of the dielectric permittivity occurred at the phase transitions, except at the tetragonal (I4/mcm)-cubic phase transition where the permittivity showed no apparent change. The dielectric behavior in the cubic and tetragonal (I4/mcm) phases are described well by a modified Kirkwood-Frohlich equation. Dielectric dispersions were found in the orthorhombic phase of CH3NH3PbBr3 and CH3NH3PbI3 at temperatures between 30 and 120 K.

引用

页码：935 / 939

页数：5

共 12 条

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