A process study of high-quality Zn(O,S)thin-film fabrication for thin-film solar cells

查看全文 作　　者：Qi [1,2]Sun;Boyan [1,2]Li;Xingye [1,2]Huang;Zhihua [1,2]Han;Dalong [1,2]Zhong;Ying [1,2]Zhao

机构地区：[1]National Institute of Clean-and-Low-Carbon Energy,PO Box 001 Shenhua NICE,Future Science&Technology City,Changping District,Beijing 102211,P.R.China;[2]Beijing Engineering Research Center of Nano-structured Thin Film Solar Cells,Beijing 102209,P.R.China

出　　处：《Clean Energy》索引2023年第7卷第2期,共10页

基　　金：financially supported by National Key R&D Program of China(grant no.2018YFB1500200). 摘　　要：The Zn(O,S)thin film is considered a most promising candidate for a cadmium-free buffer layer of the Cu(In,Ga)Se_(2)(CIGS)thin-film solar cell due to its advantages of optical responses in the short-wavelength region and adjustable bandgap.In this paper,the thin-film growth mechanism and process optimization of Zn(O,S)films fabricated using the chemical bath deposition method are sys-tematically investigated.The thickness and quality of Zn(O,S)films were found to be strongly affected by the concentration variation of the precursor chemicals.It was also revealed that different surface morphologies of Zn(O,S)films would appear if the reaction time were changed and,subsequently,the optimum reaction time was defined.The film-growth curve suggested that the growth rate varied linearly with the deposition temperature and some defects appeared when the temperature was too high.In addition,to further improve the film quality,an effective post-treatment approach was proposed and the experimental results showed that the microstructure of the Zn(O,S)thin film was improved by an ammonia etching process followed by an annealing process.For com-parison purposes,both Zn(O,S)-based and CdS-based devices were fabricated and characterized.The device with a Zn(O,S)-CIGS solar cell after post-treatment showed near conversion efficiency comparable to that of the device with the CdS-CIGS cell. 关键词：Zn(O,S) cadmium-free buffer layer chemical bath deposition reaction time deposition temperature POST-TREATMENT thin-film solar cell

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A process study of high-quality Zn(O,S)thin-film fabrication for thin-film solar cells

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