Dae‐Hyung Cho, Yong‐Duck Chung, Kyu‐Seok Lee, Ju-hee Kim, Soojeong Park, Jeha Kim
{"title":"Control of Na diffusion from soda-lime glass and NaF film into Cu(In,Ga)Se2 for thin-film solar cells","authors":"Dae‐Hyung Cho, Yong‐Duck Chung, Kyu‐Seok Lee, Ju-hee Kim, Soojeong Park, Jeha Kim","doi":"10.1109/pvsc-vol2.2012.6656704","DOIUrl":null,"url":null,"abstract":"We report on the effect of Na incorporation into Cu(In,Ga)Se2 (CIGS) for thin-film solar cells. Na ions were supplied by NaF films with different thicknesses, while those from the soda-lime glass substrate were controlled by a presence or an absence of a SiOx barrier. Gradually increasing a Na content in CIGS was found in the structures of CIGS/Mo/SiOx/SLG, CIGS/Mo/SLG, CIGS/5 nm-NaF/Mo/SiOx/SLG, CIGS/5 nm-NaF/Mo/SLG, CIGS/15 nm-NaF/Mo/SiOx/SLG, and CIGS/15 nm-NaF/Mo/SLG. With increasing the Na content, the CIGS (112) preferential orientation growth became dominant, while the (220/204) one was nearly constant. The grain size decreased with increasing the Na content. The cell efficiency (η) increased for relatively low Na content however the thick NaF led to a degradation of η because of poor adhesion between the CIGS and the Mo. The sample with the CIGS/5 nm-NaF/Mo/SiOx/SLG structure achieved the comparable (112)/(220/204) peak ratios, grain sizes, as well as the cell performances to a CIGS/Mo/SLG structure that contains the same Na content in the CIGS.","PeriodicalId":6420,"journal":{"name":"2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2012 IEEE 38th Photovoltaic Specialists Conference (PVSC) PART 2","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/pvsc-vol2.2012.6656704","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
We report on the effect of Na incorporation into Cu(In,Ga)Se2 (CIGS) for thin-film solar cells. Na ions were supplied by NaF films with different thicknesses, while those from the soda-lime glass substrate were controlled by a presence or an absence of a SiOx barrier. Gradually increasing a Na content in CIGS was found in the structures of CIGS/Mo/SiOx/SLG, CIGS/Mo/SLG, CIGS/5 nm-NaF/Mo/SiOx/SLG, CIGS/5 nm-NaF/Mo/SLG, CIGS/15 nm-NaF/Mo/SiOx/SLG, and CIGS/15 nm-NaF/Mo/SLG. With increasing the Na content, the CIGS (112) preferential orientation growth became dominant, while the (220/204) one was nearly constant. The grain size decreased with increasing the Na content. The cell efficiency (η) increased for relatively low Na content however the thick NaF led to a degradation of η because of poor adhesion between the CIGS and the Mo. The sample with the CIGS/5 nm-NaF/Mo/SiOx/SLG structure achieved the comparable (112)/(220/204) peak ratios, grain sizes, as well as the cell performances to a CIGS/Mo/SLG structure that contains the same Na content in the CIGS.