Siming Li, R. Farshchi, Michael F. Miller, A. Arehart, D. Kuciauskas
{"title":"高效(Ag,Cu)(in,Ga)Se2中缺陷的光学表征","authors":"Siming Li, R. Farshchi, Michael F. Miller, A. Arehart, D. Kuciauskas","doi":"10.1109/PVSC45281.2020.9300566","DOIUrl":null,"url":null,"abstract":"We applied time-resolved photoluminescence (TRPL) spectroscopy to study optimized chalcopyrite (Ag,Cu)(In,Ga)Se<inf>2</inf> thin films. The device shows power conversion efficiency of 18.7%. The metastable defect V<inf>Se</inf>-V<inf>Cu</inf> within ACIGS at <tex>$\\text{Ev}+0.98\\ \\text{eV}$</tex> is detected in sub-bandgap TRPL excitation spectra. TRPL lifetime of 50 ns is limited by the density of mid-gap defects such as Cu<inf>Ga</inf>or Cu<inf>In</inf>. The similarity of TRPL dynamics before and after light soaking indicates the optimized ACIGS thin film is less metastable because the density of V<inf>Cu</inf>-V<inf>Se</inf> defect is reduced to below 10<sup>15</sup>cm<sup>−3</sup>. This study indicates that ACIGS has improved cell efficiency and reliability characteristics.","PeriodicalId":6773,"journal":{"name":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2020-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Optical Characterization of Defects in High-efficiency (Ag,Cu)(In,Ga)Se2\",\"authors\":\"Siming Li, R. Farshchi, Michael F. Miller, A. Arehart, D. Kuciauskas\",\"doi\":\"10.1109/PVSC45281.2020.9300566\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We applied time-resolved photoluminescence (TRPL) spectroscopy to study optimized chalcopyrite (Ag,Cu)(In,Ga)Se<inf>2</inf> thin films. The device shows power conversion efficiency of 18.7%. The metastable defect V<inf>Se</inf>-V<inf>Cu</inf> within ACIGS at <tex>$\\\\text{Ev}+0.98\\\\ \\\\text{eV}$</tex> is detected in sub-bandgap TRPL excitation spectra. TRPL lifetime of 50 ns is limited by the density of mid-gap defects such as Cu<inf>Ga</inf>or Cu<inf>In</inf>. The similarity of TRPL dynamics before and after light soaking indicates the optimized ACIGS thin film is less metastable because the density of V<inf>Cu</inf>-V<inf>Se</inf> defect is reduced to below 10<sup>15</sup>cm<sup>−3</sup>. This study indicates that ACIGS has improved cell efficiency and reliability characteristics.\",\"PeriodicalId\":6773,\"journal\":{\"name\":\"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2020-06-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/PVSC45281.2020.9300566\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2020 47th IEEE Photovoltaic Specialists Conference (PVSC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/PVSC45281.2020.9300566","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Optical Characterization of Defects in High-efficiency (Ag,Cu)(In,Ga)Se2
We applied time-resolved photoluminescence (TRPL) spectroscopy to study optimized chalcopyrite (Ag,Cu)(In,Ga)Se2 thin films. The device shows power conversion efficiency of 18.7%. The metastable defect VSe-VCu within ACIGS at $\text{Ev}+0.98\ \text{eV}$ is detected in sub-bandgap TRPL excitation spectra. TRPL lifetime of 50 ns is limited by the density of mid-gap defects such as CuGaor CuIn. The similarity of TRPL dynamics before and after light soaking indicates the optimized ACIGS thin film is less metastable because the density of VCu-VSe defect is reduced to below 1015cm−3. This study indicates that ACIGS has improved cell efficiency and reliability characteristics.
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