Improvement of photoelectric properties of TiO2/Bi2S3 composite film by annealing treatment

被引：20

作者：

Li, Xinli ^{[1
]}

Han, Xueyang ^{[1
]}

Zhu, Di ^{[1
]}

Chen, Yongchao ^{[1
]}

Li, Lihua ^{[1
]}

Ma, Zhanhong ^{[1
]}

Gu, Yongjun ^{[1
]}

Ren, Fengzhang ^{[1
]}

Huang, Jinliang ^{[1
]}

机构：

[1] Henan Univ Sci & Technol, Key Lab Henan Prov Nonferrous Metall Mat Sci & Fa, Innovat Ctr Nonferrous Met Henan Prov, Sch Mat Sci & Engn, Luoyang, Peoples R China

来源：

OPTICAL MATERIALS | 2019年 / 91卷

基金：

中国博士后科学基金;

关键词：

TiO2/Bi2S3 composite film; Annealing treatment; Photoelectric properties; Hydrothermal method; TITANIA NANOTUBES; FABRICATION; ARRAYS;

D O I：

10.1016/j.optmat.2019.03.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The one-dimensional structure TiO2/Bi2S3 composite films can be used as the photo-anode in the thin film solar cells. Due to its advantages of wide optical absorption range and relatively simpler fabrication progress, the composite film TiO2/Bi2S3 show important value in the photovoltaic field. The composite films were prepared with the simple two step hydrothermal method. The composite film TiO2/Bi2S3 was treated under different annealing temperatures (200 degrees C, 300 degrees C, 350 degrees C and 400 degrees C). The effect of the annealing temperature on morphology, microstructure, crystallite size, band gap, optical and electrical properties of the resultant material have been investigated. After annealing treatment, the photocurrent density of the composite film was significantly increased. With the increase of annealing temperature, the change tendency of optical absorption and photocurrent density show the same trend, both of them first increase and then decrease. The TiO2/Bi2S3 composite film annealed at 350 degrees C showed the best photoelectric properties. The Bode-Phase plots indicated the electron lifetime in TiO2/Bi2S3 composite film with 350 degrees C annealing treatment is about four times than that in as-deposited TiO2/Bi2S3 film. The annealing treatment can promote the secondary growth of Bi2S3 crystals in the composite film TiO2/Bi2S3, increase the light absorption, improve the utilization of sunlight, and thus increase the photocurrent density.

引用

页码：101 / 107

页数：7

共 20 条

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