Growth, characterization and optoelectronic applications of pure-phase large-area CsPb2Br5 flake single crystals

被引：101

作者：

Zhang, Zhaojun ^{[1
,3
]}

Zhu, Yanming ^{[1
,3
]}

Wang, Weiliang ^{[1
,3
]}

Zheng, Wei ^{[2
,3
]}

Lin, Richeng ^{[1
,3
]}

Huang, Feng ^{[2
,3
]}

机构：

[1] Sun Yat Sen Univ, Sch Phys, Xingang Xi Rd 135, Guangzhou 510275, Guangdong, Peoples R China

[2] Sun Yat Sen Univ, Sch Mat, Xingang Xi Rd 135, Guangzhou 510275, Guangdong, Peoples R China

[3] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Xingangxi Rd 135, Guangzhou 510275, Guangdong, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2018年 / 6卷 / 03期

基金：

中国国家自然科学基金;

关键词：

UV PHOTODETECTOR; LEAD HALIDE; PEROVSKITE; LUMINESCENT; CESIUM; CSPBX3; BR; CL; NANOCRYSTALS;

D O I：

10.1039/c7tc04834c

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To clarify the controversies on CsPb2Br5 and extend its opto-electronic applications, from a thermodynamic equilibrium growth system, pure phase high quality CsPb2Br5 single crystals (maximum area: 5 x 5 mm(2), minimum thickness: 160 nm) were successfully obtained. Optical characterization results indicated a 3.87 eV bandgap for CsPb2Br5, clarifying the controversies on CsPb2Br5. The fabricated photodetector showed a sensitive and fast deep-UV photoresponse, demonstrating the potential applications of CsPb2Br5 in deep-UV detection. Theoretical calculations suggested that the wide bandgap of CsPb2Br5 resulted from its layered structure and short Pb-Br bonds.

引用

页码：446 / 451

页数：6

共 23 条

[1] Nearly Monodisperse Insulator Cs4PbX6 (X = Cl, Br, I) Nanocrystals, Their Mixed Halide Compositions, and Their Transformation into CsPbX3 Nanocrystals [J].