Effect of ZnS coating on the photovoltaic properties of CdSe quantum dot-sensitized solar cells

被引：389

作者：

Shen, Qing ^{[1
,2
]}

Kobayashi, Junya ^{[1
]}

Diguna, Lina J. ^{[1
,2
]}

Toyoda, Taro ^{[1
,2
]}

机构：

[1] Univ Electrocommun, Dept Appl Phys & Chem, Tokyo 1828585, Japan

[2] Univ Electrocommun, Course Coherent Opt Sci, Tokyo 1828585, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 08期

关键词：

D O I：

10.1063/1.2903059

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

CdSe quantum dots (QDs) were adsorbed onto nanostructured TiO(2) films for different times by using a chemical bath deposition method in order to produce QD-sensitized solar cells (QDSSCs). Surface modification was done by coating ZnS onto the CdSe QDs. The optical absorption and current-voltage characteristics of these devices were studied. The size of the CdSe QDs increased with increasing adsorption time, and there was an optimum CdSe adsorption time for achieving the best photovoltaic conversion efficiency. The photovoltaic properties of short-circuit current density, open-circuit voltage, and photovoltaic conversion efficiency were significantly improved after modifying the surface with ZnS. Under a solar illumination of 100 mW/cm(2), an efficiency as high as 2.02% was achieved for the CdSe QDSSCs that were made by using this method. (C) 2008 American Institute of Physics.

引用

页数：5

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