Bandgap engineering of Cu2CdxZn1-xSnS 4 alloy for photovoltaic applications: A complementary experimental and first-principles study

	Bandgap engineering of Cu2CdxZn1-xSnS 4 alloy for photovoltaic applications: A complementary experimental and first-principles study
	Xiao Z.-Y.; Li Y.-F.; Yao B.; Deng R.; Ding Z.-H.; Wu T.; Yang G.; Li C.-R.; Dong Z.-Y.; Liu L.; Zhang L.-G.; Zhao H.-F.
	2013
发表期刊	Journal of Applied Physics
ISSN	ISBN/00218979
卷号	114 期号:18
摘要	We report on bandgap engineering of an emerging photovoltaic material of Cu2CdxZn1-xSnS4 (CCZTS) alloy. CCZTS alloy thin films with different Cd contents and single kesterite phase were fabricated using the sol-gel method. The optical absorption measurements indicate that the bandgap of the kesterite CCZTS alloy can be continuously tuned in a range of 1.55-1.09 eV as Cd content varied from x = 0 to 1. Hall effect measurements suggest that the hole concentration of CCZTS films decreases with increasing Cd content. The CCZTS-based solar cell with x = 0.47 demonstrates a power conversion efficiency of 1.2%. Our first-principles calculations based on the hybrid functional method demonstrate that the bandgap of the kesterite CCZTS alloy decreases monotonically with increasing Cd content, supporting the experimental results. Furthermore, Cu2ZnSnS4/Cu 2CdSnS4 interface has a type-I band-alignment with a small valence-band offset, explaining the narrowing of the bandgap of CCZTS as the Cd content increases. Our results suggest that CCZTS alloy is a potentially suitable material to fabricate high-efficiency multi-junction tandem solar cells with different bandgap-tailored absorption layers. 2013 AIP Publishing LLC.
收录类别	SCI ; EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/40565
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Xiao Z.-Y.,Li Y.-F.,Yao B.,et al. Bandgap engineering of Cu2CdxZn1-xSnS 4 alloy for photovoltaic applications: A complementary experimental and first-principles study[J]. Journal of Applied Physics,2013,114(18).
APA	Xiao Z.-Y..,Li Y.-F..,Yao B..,Deng R..,Ding Z.-H..,...&Zhao H.-F..(2013).Bandgap engineering of Cu2CdxZn1-xSnS 4 alloy for photovoltaic applications: A complementary experimental and first-principles study.Journal of Applied Physics,114(18).
MLA	Xiao Z.-Y.,et al."Bandgap engineering of Cu2CdxZn1-xSnS 4 alloy for photovoltaic applications: A complementary experimental and first-principles study".Journal of Applied Physics 114.18(2013).

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