Photosensitization of TiO2 nanorods with CdS quantum dots for photovoltaic applications: A wet-chemical approach

被引：79

作者：

Wang, Chenbo ^{[1
]}

Jiang, Zifei ^{[1
]}

Wei, Lin ^{[2
]}

Chen, Yanxue ^{[1
]}

Jiao, Jun ^{[3
]}

Eastman, Micah ^{[3
]}

Liu, Hong ^{[1
]}

机构：

[1] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

[2] Shandong Univ, Sch Informat Sci & Engn, Jinan 250100, Peoples R China

[3] Portland State Univ, Dept Phys, Portland, OR 97207 USA

来源：

NANO ENERGY | 2012年 / 1卷 / 03期

基金：

中国国家自然科学基金;

关键词：

QDSSC; TiO2; CdS; Wet-chemical; Nanorod; MULTIPLE EXCITON GENERATION; SOLAR-CELLS; EFFICIENCY; SIZE; NANOSTRUCTURES; NANOPARTICLES; NANOCRYSTALS; GROWTH;

D O I：

10.1016/j.nanoen.2012.02.005

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：

We combine CdS semiconductor quantum dots and single-crystalline rutile TiO2 nanorod arrays to produce a practical quantum dot sensitized solar cell. A facile wet-chemical approach was implemented for growth of this CdS@TiO2 architecture. Rutile TiO2 nanorod arrays with lengths of 1-2 mu m and diameters of 40-60 nm were synthesized on fluorine-doped tin oxide glass by a hydrothermal process in a titanium tetrachloride precursor solution. CdS quantum dots with a size of 5-10 nm were deposited onto a TiO2 nanorod surface using an ultrasonic-assisted chemical bath deposition method. The resulting CdS quantum dots and TiO2 nanorods formed a type-II heterojunction and showed increased absorption over visible light range. Incident photon-to-current conversion efficiencies (IPCE) as high as 85% and power conversion efficiencies of 2.54% were obtained using a polysulfide electrolyte. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：440 / 447

页数：8

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