{"title":"Aluminum backside segregation","authors":"H. Hieslmair, S. Mchugo, E. Weber","doi":"10.1109/PVSC.1996.564038","DOIUrl":null,"url":null,"abstract":"Aluminum backside gettering of iron was quantitatively characterized and distinguished from effects of precipitation or back surface fields. It is shown that for high impurity concentrations, precipitation increases minority carrier diffusion lengths. This effect is small compared to the diffusion length increases from aluminum gettering. Segregation coefficients (S) for iron between silicon and the backside aluminum were found exceeding 10/sup 6/ and there are indications for S up to 10/sup 7/.","PeriodicalId":410394,"journal":{"name":"Conference Record of the Twenty Fifth IEEE Photovoltaic Specialists Conference - 1996","volume":"9 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1996-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"9","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Conference Record of the Twenty Fifth IEEE Photovoltaic Specialists Conference - 1996","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/PVSC.1996.564038","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 9
Abstract
Aluminum backside gettering of iron was quantitatively characterized and distinguished from effects of precipitation or back surface fields. It is shown that for high impurity concentrations, precipitation increases minority carrier diffusion lengths. This effect is small compared to the diffusion length increases from aluminum gettering. Segregation coefficients (S) for iron between silicon and the backside aluminum were found exceeding 10/sup 6/ and there are indications for S up to 10/sup 7/.