Photoelectrical properties of CdS/CdSe core/shell QDs modified anatase TiO2 nanowires and their application for solar cells

被引：24

作者：

Qiu, Qingqing ^{[1
]}

Wang, Ping ^{[2
]}

Xu, Lingling ^{[3
]}

Wang, Dejun ^{[1
,4
]}

Lin, Yanhong ^{[1
]}

Xie, Tengfeng ^{[1
]}

机构：

[1] Jilin Univ, Coll Chem, Changchun 130012, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130012, Peoples R China

[3] Harbin Normal Univ, Sch Phys & Elect Engn, Minist Educ, Key Lab Photon & Elect Bandgap Mat, Harbin 150025, Peoples R China

[4] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2017年 / 19卷 / 24期

基金：

中国国家自然科学基金;

关键词：

QUANTUM DOTS; PHOTOELECTROCHEMICAL PERFORMANCE; UP-CONVERSION; NANOCRYSTALS; PHOTOVOLTAGE; WATER; CDSE; PHOTOANODES; EFFICIENCY; ARRAYS;

D O I：

10.1039/c7cp02358h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Anatase TiO2 nanowire (NW) films modified with inverted type-I CdS/CdSe core/shell structure QDs have been successfully prepared by the post synthesis ligand-assisted technique. Surface photovoltage (SPV), transient photovoltage (TPV) and transient photocurrent (TPC) measurements demonstrate that CdS/CdSe core/shell structure QD-sensitized TiO2 NWs electrodes favor photoexicited electron injection and charge transfer due to the special photo-electronic features of CdS/CdSe core/shell structure QDs. With a polysulfide electrolyte, the maximum conversion efficiency was 2.18% for CdS/CdSe QDs with the CdSe shell being 4.4 nanometers thick; a PCE of 0.07% for CdS QDs and a PCE of 0.63% for CdSe QDs were obtained under illumination at 100 mW cm(-2). The results reveal that the CdS/CdSe core/shell structure QDs sensitized TiO2 NW electrodes have promising applications in solar cells.

引用

页码：15724 / 15733

页数：10

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