The investigation of ZnO:Al2O3/metal composite back reflectors in amorphous silicon germanium thin film solar cells

doi:10.1088/1674-1056/22/6/068102

Abstract Different aluminum-doped ZnO (AZO)/metal composite thin films, including AZO/Ag/Al, AZO/Ag/nickel-chromium alloy (NiCr), and AZO/Ag/NiCr/Al, are utilized as the back reflectors of p-i-n amorphous silicon germanium thin film solar cells. NiCr is used as diffusion barrier layer between Ag and Al to prevent mutual diffusion, which increases the short circuit current density of solar cell. NiCr and NiCr/Al layers are used as protective layers of Ag layer against oxidation and sulfurization, the higher efficiency of solar cell is achieved. The experimental results show that the performance of a-SiGe solar cell with AZO/Ag/NiCr/Al back reflector is best. The initial conversion efficiency is achieved to be 8.05%.

Keywords: a-SiGe solar cells composite back reflector NiCr diffusion barrier layer

Received: 27 July 2012
Revised: 04 December 2012
Accepted manuscript online:

PACS:	81.15.Gh	(Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.))
	88.40.jj	(Silicon solar cells)
	42.82.Bq	(Design and performance testing of integrated-optical systems)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2011CBA00705) and the High Technology Research Program of China (Grant No. 2011AA050502).

Corresponding Authors: Wang Guang-Hong
E-mail: wangguanghong@mail.iee.ac.cn

Cite this article:

Wang Guang-Hong (王光红), Zhao Lei (赵雷), Yan Bao-Jun (闫保军), Chen Jing-Wei (陈静伟), Wang Ge (王革), Diao Hong-Wei (刁宏伟), Wang Wen-Jing (王文静) The investigation of ZnO:Al₂O₃/metal composite back reflectors in amorphous silicon germanium thin film solar cells 2013 Chin. Phys. B 22 068102

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The investigation of ZnO:Al2O3/metal composite back reflectors in amorphous silicon germanium thin film solar cells

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The investigation of ZnO:Al₂O₃/metal composite back reflectors in amorphous silicon germanium thin film solar cells