气候变化领域集成服务门户(CCPortal): Cd-Free Cu2ZnSnS4 solar cell with an efficiency greater than 10% enabled by Al2O3 passivation layers

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DOI	10.1039/c9ee01726g
	Cd-Free Cu2ZnSnS4 solar cell with an efficiency greater than 10% enabled by Al2O3 passivation layers
	Cui X.; Sun K.; Huang J.; Yun J.S.; Lee C.-Y.; Yan C.; Sun H.; Zhang Y.; Xue C.; Eder K.; Yang L.; Cairney J.M.; Seidel J.; Ekins-Daukes N.J.; Green M.; Hoex B.; Hao X.
发表日期	2019
ISSN	1754-5692
起始页码	2751
结束页码	2764
卷号	12 期号:9
英文摘要	Environmentally friendly earth-abundant Cd-free Cu2ZnSnS4 (CZTS) solar cells have recently achieved increasing power conversion efficiency by using ZnSnO as the buffer layer. However, the large open circuit voltage (Voc) deficit remains the key concern. Here, we report a Cd-free CZTS solar cell that exhibits an energy conversion efficiency of 10.2% resulting from the application of an aluminium oxide (Al2O3) passivation layer prepared by atomic layer deposition (ALD). We found that the application of full ALD cycles as well as trimethylaluminum (TMA) exposures resulted in a significant increase in Voc and relate this to the properties of the CZTS interface. Both processes facilitate the formation of a thicker Cu-deficient nanolayer with a higher concentration of Na and O, forming a homogeneous passivation layer across the CZTS surface. This nanolayer reduces the local potential fluctuation of band edges and leads to the widened electrical band gap and suppressed defects recombination at the heterojunction interface, thus improvement in Voc and device performance. The ability of nanolayers to alter the atomic composition in the near surface region of compound semiconductors might be beneficial for a wider range of semiconductor devices. © 2019 The Royal Society of Chemistry.
语种	英语
scopus关键词	Alumina; Aluminum oxide; Atomic layer deposition; Buffer layers; Conversion efficiency; Copper compounds; Energy gap; Heterojunctions; Open circuit voltage; Passivation; Solar cells; Tin compounds; Zinc compounds; Atomic compositions; Compound semiconductors; Defects recombination; Device performance; Heterojunction interfaces; Large open circuit voltages; Near surface regions; Power conversion efficiencies; Cadmium compounds; aluminum oxide; concentration (composition); efficiency measurement; energy efficiency; equipment; fuel cell; inorganic compound; performance assessment
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162429
作者单位	School of Photovoltaic and Renewable Energy Engineering, UNSW Sydney, Sydney, NSW 2052, Australia; Australian Centre for Microscopy and Microanalysis, University of Sydney, Sydney, NSW, Australia; School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
推荐引用方式 GB/T 7714	Cui X.,Sun K.,Huang J.,et al. Cd-Free Cu2ZnSnS4 solar cell with an efficiency greater than 10% enabled by Al2O3 passivation layers[J],2019,12(9).
APA	Cui X..,Sun K..,Huang J..,Yun J.S..,Lee C.-Y..,...&Hao X..(2019).Cd-Free Cu2ZnSnS4 solar cell with an efficiency greater than 10% enabled by Al2O3 passivation layers.Energy and Environmental Science,12(9).
MLA	Cui X.,et al."Cd-Free Cu2ZnSnS4 solar cell with an efficiency greater than 10% enabled by Al2O3 passivation layers".Energy and Environmental Science 12.9(2019).