Enhanced photovoltaic performance of a cadmium sulfide/cadmium selenide-sensitized solar cell using an aluminum-doped zinc oxide electrode

被引:8
作者
Eskandari, M. [1 ]
Ahmadi, V. [2 ]
Ghahary, R. [2 ]
机构
[1] Tarbiat Modares Univ, Dept Nanomat Engn, Tehran, Iran
[2] Tarbiat Modares Univ, Dept Elect Engn, Tehran, Iran
关键词
Aluminum doped zinc oxide; Charge transfer process; Electrochemical impedance spectroscopy; Quantum dot sensitized solar cells; ZNO NANOROD ARRAYS; OPTICAL-PROPERTIES; THIN-FILMS; IMPEDANCE SPECTROSCOPY; AQUEOUS-SOLUTION; AL; RECOMBINATION; EFFICIENCY; LAYER; TRANSPARENT;
D O I
10.1016/j.ceramint.2014.10.051
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Al-doped ZnO nanorods were used as the photoanode of quantum-dot-sensitized solar cells (QDSSCs). Solar cell with CdS/CdSe quantum dots co-sensitized 0.5% Al-doped ZnO nanorods yielded a photovoltaic conversion efficiency of 3.16%, which is higher than that of the cell based on undoped ZnO nanorods (2.30%). This energy conversion efficiency improvement might be attributed to the increased light harvesting efficiency induced by the large amount of quantum dots adsorbed on the large surface area of ZnO NRs, and reduction of transport resistance in the photoanode of QDSSCs with introduction of Al into ZnO structure, which leads to the increasing short-circuit current density. The results also show that recombination rate increases with introduction of Al into ZnO, resulting in the reduction of open-circuit voltage. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码:2373 / 2380
页数:8
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