Two-dimensional lead-free mixed-halide perovskites with tunable optical properties

被引：4
|
作者：
Cao, Jing [1 ]
Xiong, Xiaoyu [1 ]
Zhou, Ji [1 ]
机构：
[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY C | 2023年 / 11卷 / 07期
关键词：
SINGLE-CRYSTAL; SQUARE-PLANAR;
D O I：
10.1039/d2tc04983j
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Chemically tuned organic-inorganic layered (C4H9NH3)(2)CuClxBr4-x perovskites have been synthesized and characterized. The crystal structure was investigated by X-ray diffraction (XRD). The morphology was explored by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The chemical structure was studied by Raman spectroscopy and Fourier transform infrared (FTIR) spectroscopy. The thermal stability was determined by thermogravimetric analysis (TGA). The optical properties were investigated by UV-Vis absorption spectroscopy and spectroscopic ellipsometry. Thermochromism in (C4H9NH3)(2)CuClxBr4-x crystals was observed and the mechanism was determined by a combination of differential scanning calorimetry (DSC), in situ temperature-dependent Raman spectroscopy, and in situ temperature-dependent XRD. This study paves the way to explore the structure-property relationships in two-dimensional perovskites and offers inspiration for the development of eco-friendly thermochromic devices.
引用
收藏
页码：2764 / 2770
页数：7
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