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Properties of Cu(In,Ga)Se2:Fe Thin Films For Solar Cells

Published online by Cambridge University Press:  01 February 2011

Keiichiro Sakurai ,
Hajime Shibata ,
Satoshi Nakamura ,
Minoru Yonemura ,
Shinpei Kuwamori ,
Yasuyuki Kimura ,
Shogo Ishizuka ,
Akimasa Yamada ,
Koji Matsubara  and
Hisayuki Nakanishi
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Keiichiro Sakurai
Affiliation:
Research Center for Photovoltaics, AIST, #2-24412, 1-1-1 Umezono, Tsukuba, 305-8568Japan
Hajime Shibata
Affiliation:
Research Center for Photovoltaics, AIST, #2-24412, 1-1-1 Umezono, Tsukuba, 305-8568Japan
Satoshi Nakamura
Affiliation:
Electrical Engineering, TUS, Noda, 278-8510Japan
Minoru Yonemura
Affiliation:
Electrical Engineering, TUS, Noda, 278-8510Japan
Shinpei Kuwamori
Affiliation:
Electrical Engineering, TUS, Noda, 278-8510Japan
Yasuyuki Kimura
Affiliation:
Electrical Engineering, TUS, Noda, 278-8510Japan
Shogo Ishizuka
Affiliation:
Research Center for Photovoltaics, AIST, #2-24412, 1-1-1 Umezono, Tsukuba, 305-8568Japan
Akimasa Yamada
Affiliation:
Research Center for Photovoltaics, AIST, #2-24412, 1-1-1 Umezono, Tsukuba, 305-8568Japan
Koji Matsubara
Affiliation:
Research Center for Photovoltaics, AIST, #2-24412, 1-1-1 Umezono, Tsukuba, 305-8568Japan
Hisayuki Nakanishi
Affiliation:
Electrical Engineering, TUS, Noda, 278-8510Japan
Shigeru Niki
Affiliation:
Research Center for Photovoltaics, AIST, #2-24412, 1-1-1 Umezono, Tsukuba, 305-8568Japan
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Abstract

We have fabricated CIGS:Fe polycrystalline thin films using a standard three-stage method, and investigated the effects of Fe doping on cell performances. The Ga / (In+Ga) ratio was varied between 0.3 ˜ 1.0 (= CGS), and the Fe concentration was varied between 0.0 ˜ 1.2 mol%. The films were characterized by various means, including the cell performance. Increment of the grain size with higher Fe content was observed. Redshift with higher Fe content was observed in the absorbance spectra. The spectral response of the fabricated solar cells deteriorated with higher Fe content, from the long wavelength side.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 865: Symposium F – Thin-Film Compound Semiconductor Photovoltaics , 2005 , F14.12
Copyright
Copyright © Materials Research Society 2005

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References

1for example, Romeo, A., Terheggen, M., Abou-Ras, D., Batzner, D.L., Haug, F.J., Kalin, M., Rudmann, D., Tiwari, A.N., Progress in Photovoltaics: Research and Applications 12, 93–111 (2004).Google Scholar
2 Wasim, S.M., Durante, C., Rincon, C., Materials Letters 28, 231 (1996). Voltage (V) Fig.5 I-V characteristics of the CIGS:Fe solar cells. The cell performance deteriorated significantly with higher Fe content.Google Scholar
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