Structural study on cubic-tetragonal transition of CH3NH3PbI3

被引：453

作者：

Kawamura, Y ^{[1
]}

Mashiyama, H ^{[1
]}

Hasebe, K ^{[1
]}

机构：

[1] Yamaguchi Univ, Fac Sci, Dept Phys, Yamaguchi 7538512, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2002年 / 71卷 / 07期

关键词：

X-ray diffraction; structure analysis; order parameter; tetragonal phase; methylammonium; triiodideplumbate;

D O I：

10.1143/JPSJ.71.1694

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The cubic-tetragonal Phase transition of CH3NH3PbI3 was investigated by single crystal X-ray diffractometry. The crystal structure was refined at five temperatures in the teragonal phase. The PbI6 octahedron rorates around the c-axis alternatively to construct the SrTiO3-type tetragonal structure. A methylammonium ion is Partially orderd; 24 disordered states in the Cubic phase are reduced to 8. With decreasing temperature, the rotation angle of the octahedron increases monotonically. which indicates it is an order parameter of the cubic-tetragonal transition.

引用

页码：1694 / 1697

页数：4

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