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A Study of the Diffusion and pn-Junction Formation in CIGS Solar Cells using EBIC and EDX Measurements

Published online by Cambridge University Press:  01 February 2011

Shogo Ishizuka ,
Keiichiro Sakurai ,
Koji Matsubara ,
Akimasa Yamada ,
Minoru Yonemura ,
Shimpei Kuwamori ,
Satoshi Nakamura ,
Yasuyuki Kimura ,
Hisayuki Nakanishi  and
Shigeru Niki
Shogo Ishizuka
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
Keiichiro Sakurai
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
Koji Matsubara
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
Akimasa Yamada
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
Minoru Yonemura
Affiliation:
Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
Shimpei Kuwamori
Affiliation:
Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
Satoshi Nakamura
Affiliation:
Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
Yasuyuki Kimura
Affiliation:
Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
Hisayuki Nakanishi
Affiliation:
Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
Shigeru Niki
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
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Abstract

Using EBIC and EDX measurements, CIGS solar cells prepared under several different conditions were observed and characterized. The results of EBIC and EDX measurements suggest that Cd plays an important role in the forming of a buried pn-junction in the CIGS layer via diffusion, and de-emphasize the possibility of the formation of the hetero pn-junction at the CdS/CIGS heterointerface. The correlation of the extent of the space charge region and the observed shift in the pn-junction location with the diffusion of the constituent elements in CIGS was investigated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 865: Symposium F – Thin-Film Compound Semiconductor Photovoltaics , 2005 , F6.3
Copyright
Copyright © Materials Research Society 2005

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