Juan‐Pablo Correa‐Baena, Yanqi Luo, Thomas M. Brenner, Jordan M. Snaider, Shijing Sun, Xueying Li, M. Jensen, Noor Titan Putri Hartono, L. Nienhaus, S. Wieghold, Jeremy R. Poindexter, Shen Wang, Y. Meng, Ti Wang, B. Lai, M. Holt, Z. Cai, M. Bawendi, Libai Huang, T. Buonassisi, D. Fenning
{"title":"Halide Homogenization and Cation Segregation in High Performance Perovskite Solar Cells","authors":"Juan‐Pablo Correa‐Baena, Yanqi Luo, Thomas M. Brenner, Jordan M. Snaider, Shijing Sun, Xueying Li, M. Jensen, Noor Titan Putri Hartono, L. Nienhaus, S. Wieghold, Jeremy R. Poindexter, Shen Wang, Y. Meng, Ti Wang, B. Lai, M. Holt, Z. Cai, M. Bawendi, Libai Huang, T. Buonassisi, D. Fenning","doi":"10.1109/PVSC40753.2019.9198952","DOIUrl":null,"url":null,"abstract":"Compositional engineering related to the organic and inorganic cations (A-site) in halide perovskites solar cells has helped improve efficiency and long-term durability. However, this compositional complexity can lead to phase segregation that weakens the optoelectronic performance. Here, we show the halide distribution and cation distribution by means of synchrotron-based nanoprobe x-ray fluorescence. We find that the halide distribution homogenizes upon the addition of CsI and RbI precursors. The halide homogenization coincides with long-lived charge carrier decays. Additionally, we observe Rb-rich areas that phase segregate within the film and the Rb aggregates are identified to be recombination active using X-ray and E-beam induced current microscopy.","PeriodicalId":6749,"journal":{"name":"2019 IEEE 46th Photovoltaic Specialists Conference (PVSC)","volume":"7 1","pages":"1-2"},"PeriodicalIF":0.0000,"publicationDate":"2019-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2019 IEEE 46th Photovoltaic Specialists Conference (PVSC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/PVSC40753.2019.9198952","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Compositional engineering related to the organic and inorganic cations (A-site) in halide perovskites solar cells has helped improve efficiency and long-term durability. However, this compositional complexity can lead to phase segregation that weakens the optoelectronic performance. Here, we show the halide distribution and cation distribution by means of synchrotron-based nanoprobe x-ray fluorescence. We find that the halide distribution homogenizes upon the addition of CsI and RbI precursors. The halide homogenization coincides with long-lived charge carrier decays. Additionally, we observe Rb-rich areas that phase segregate within the film and the Rb aggregates are identified to be recombination active using X-ray and E-beam induced current microscopy.
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