Branched Bi2S3/TiO2 nano-heterostructure with enhanced photoelectric performance

被引：6

作者：

Ning, Xiangmei ^{[1
,2
,3
]}

Huang, Jinliang ^{[1
,2
,3
]}

Li, Lihua ^{[1
]}

Gu, Yongjun ^{[1
]}

Jia, Shuguo ^{[1
,2
,3
]}

Qiu, Ranfeng ^{[1
,2
,3
]}

Kim, Bok H. ^{[1
,4
]}

机构：

[1] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Luoyang 471023, Henan, Peoples R China

[2] Key Lab Henan Prov Nonferrous Metall Mat Sci & Fa, Luoyang 471023, Henan, Peoples R China

[3] Innovat Ctr Nonferrous Met Henan Prov, Luoyang 471023, Henan, Peoples R China

[4] Chonbuk Natl Univ, Hydrogen & Fuel Cell Res Ctr, Div Adv Mat Engn, Jeonju, South Korea

来源：

MATERIALS RESEARCH EXPRESS | 2019年 / 6卷 / 12期

基金：

中国国家自然科学基金;

关键词：

TiO2; nanorod; heterostructure; photoelectric performance; Bi2S3; nanosheet; SENSITIZED SOLAR-CELLS; QUANTUM DOTS; ELECTRON-TRANSPORT; TIO2; ARRAYS; DEPOSITION; FABRICATION; GROWTH; LAYER; FILMS;

D O I：

10.1088/2053-1591/ab554d

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fabrication of a branched nano-heterostructure composed of Bi2S3 nanosheet branches and TiO2 nanorod stem was performed using a facile and cost-effective hydrothermal method. The nanoscale morphology of Bi2S3 deposited on TiO2 nanorod arrays was regulated by controlling the hydrothermal growth time of Bi2S3 sensitizer. The optical properties and photoelectrochemical performance were evaluated systematically for Bi2S3/TiO2 heterostructures with different morphology. The Bi2S3/TiO2 heterostructures presented the higher visible-light absorption ability and photoelectric performance compared to the bare TiO2. The highest photocurrent density of approximately 6.01 mA cm(?2) was obtained for the Bi2S3/TiO2 heterostructure with 1 h hydrothermal sensitization time. The improved photoelectric performance was attributed to the unique branched structure resulting in an obviously enhanced light absorption in visible-light region and better electron-hole separation and transporation.

引用

页数：9