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Characterization of Electron-Induced Defects in Cu (In, Ga) Se2 Thin Films by Photoluminescence

Published online by Cambridge University Press:  07 May 2015

Shirou Kawakita ,
Mitsuru Imaizumi ,
Shogo Ishizuka ,
Hajime Shibata ,
Shigeru Niki ,
Shuichi Okuda  and
Hiroaki Kusawake
Shirou Kawakita
Affiliation:
Japan Aerospace Exploration Agency (JAXA), Tsukuba, Ibaraki, 305-8505Japan
Mitsuru Imaizumi
Affiliation:
Japan Aerospace Exploration Agency (JAXA), Tsukuba, Ibaraki, 305-8505Japan
Shogo Ishizuka
Affiliation:
Insititute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8568Japan
Hajime Shibata
Affiliation:
Insititute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8568Japan
Shigeru Niki
Affiliation:
Insititute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8568Japan
Shuichi Okuda
Affiliation:
Osaka Prefecture University (OPU), Sakai, Osaka, 599-8570Japan
Hiroaki Kusawake
Affiliation:
Japan Aerospace Exploration Agency (JAXA), Tsukuba, Ibaraki, 305-8505Japan
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Abstract

CIGS thin films were irradiated with 100 or 250 keV electrons to reveal the radiation defect by analyzing PL measurement. The PL intensity decreased due to non-radiative recombination defects induced by electron irradiation. Furthermore, the intensity 0.8 eV peak of the PL spectrum was observed from CIGS films irradiated with 250 eV electrons and is said to correspond to In-antisite defects in CIGS materials. The defects can usually change into InCu-VCu complex defects combined with VCu, since the formation energy of the complex defect is lower than that of each defect. Cu interstitial defects induced by 250 keV electron irradiation would diffuse to VCu of the complex defect, whereupon the complex defect might become an In-antisite defect due to 250 keV electron irradiation.

Keywords

defectsradiation effectselectron irradiation
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1771: Symposium B/C/D/E – Recent Advances in Photovoltaics , 2015 , pp. 157 - 161
Copyright
Copyright © Materials Research Society 2015 

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References

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