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Al-Doped ZnO Film as a Transparent Conductive Substrate in Indoline-Sensitized Nanoporous ZnO Solar Cell.

Published online by Cambridge University Press:  18 December 2012

B. Onwona-Agyeman ,
M. Nakao ,
G.R.A. Kumara  and
T. Kitaoka
B. Onwona-Agyeman
Affiliation:
Department of Agro-environmental Sciences, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
M. Nakao
Affiliation:
Department of Basic Science, Faculty of Engineering, Kyushu Institute of Technology, 1-1 Sensui, Tobata-ku, Kitakyushu 804-8550, Japan
G.R.A. Kumara
Affiliation:
Department of Chemistry, Peradeniya University, Peradeniya 20400, Sri Lanka
T. Kitaoka
Affiliation:
Department of Agro-environmental Sciences, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
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Abstract

We have deposited porous ZnO films on aluminum-doped ZnO (ZnO/AZO) and fluorine-doped tin oxide (ZnO/FTO) transparent substrates, and annealed both in air at 500°C. X-ray diffraction measurements of the nanoporous ZnO films after heat treatment showed that, ZnO/AZO film exhibited a dominant (002) diffraction while the ZnO/FTO showed mixed diffraction peaks with the (100) and (101) being dominant. Dye-sensitized solar cells (DSC) based on the sensitization of the porous ZnO films on AZO and FTO substrates with an indoline dye were constructed. The photoaction spectrum, which is a measure of the degree of sunlight harvesting, was broad and higher in the ZnO/AZO DSC than that of the ZnO/FTO DSC. Conversion efficiency of 7.3 % was obtained for the ZnO/AZO DSC while 4.5 % was recorded for the ZnO/FTO. The superior photovoltaic performance of the ZnO/AZO DSC is attributed to better ZnO film orientation after thermal treatment and the higher sunlight harvesting.

Keywords

crystallographic structurephotovoltaictransparent conductor
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1494: Symposium F – Oxide Semiconductors and Thin Films , 2013 , pp. 345 - 350
Copyright
Copyright © Materials Research Society 2012 

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References

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