Influence of Cu2+ dopant in optical property of CdTe quantum dots and photoelectrochemical performance of CdTe:Cu2+/TiO2 nanotube arrays

被引：4

作者：

Chen, Qian ^{[1
]}

Geng, Yue ^{[1
]}

Zhou, Chunyan ^{[1
]}

Song, Jiahui ^{[1
]}

Zhou, Liya ^{[1
]}

机构：

[1] Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Petrochem Resource Proc & Proc In, Nanning 530004, Peoples R China

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2016年 / 79卷

基金：

中国国家自然科学基金;

关键词：

Quantum dots; Tunable band gap; One-step synthesis; Electrochemical properties; SENSITIZED SOLAR-CELLS; X-RAY-DIFFRACTION; TIO2; NANOTUBES; THIN-FILMS; NANOCRYSTALS; CDS; PHOTOLUMINESCENCE; SURFACE; NANOPARTICLES;

D O I：

10.1016/j.physe.2015.12.017

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A novel one-step synthesis process was used to prepare CdTe:Cu-2+/TiO2 nanotube arrays (TNTAs). X-ray powder diffraction and high-resolution transmission electron microscopy analyses confirmed that the obtained CdTe:Cu2+ quantum dots (QDs) possess cubic structures, which are approximately spherical, and a small particle size (2.95 nm). The photoluminescent and UV-visible absorption spectra of CdTe: Cu2+ QDs also display an obvious redshift, which was attributed to the replacement of Cd2+ with Cu2+. Compared with that of the TNTAs and CdTe/TNTAs, the photoelectric conversion efficiency of CdTe:5% Cu2+/TNTAs increased by 785.7% and 103.3%, respectively. The incident photo-to-current conversion efficiency of CdTe:5% Cu2+/TNTAs was 50.6%, which indicated the potential use of QDs in photochemical solar cells. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：59 / 66

页数：8

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