{"title":"Distinctive Spectroscopic Characteristics Observed in Colloidal Perovskite CsPbBr3 Quantum Dot","authors":"Sangeun Cho, S. Noh, Hyungsang Kim, H. Im","doi":"10.5757/asct.2021.30.4.107","DOIUrl":null,"url":null,"abstract":"Distinctive spectroscopic characteristics are observed in colloidal perovskite CsPbBr 3 quantum dot (QD) dispersed in octane doped with PPO. As the content of CsPbBr 3 -QD increases, the emission and the absorption energies decrease due to QD-cluster formed in case of the inter-QD distance smaller than diameter of QD. Spectroscopic evidences supporting QD-cluster are found in the Urbach energy and the carrier lifetime. Unusual absorption lines showing explicit QD dependence are observed in Fourier-transform infrared spectra, which is explained by vibrational modes of bound PPO hybridized with CsPbBr 3 -QD.","PeriodicalId":8223,"journal":{"name":"Applied Science and Convergence Technology","volume":null,"pages":null},"PeriodicalIF":1.2000,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Science and Convergence Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5757/asct.2021.30.4.107","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 1
Abstract
Distinctive spectroscopic characteristics are observed in colloidal perovskite CsPbBr 3 quantum dot (QD) dispersed in octane doped with PPO. As the content of CsPbBr 3 -QD increases, the emission and the absorption energies decrease due to QD-cluster formed in case of the inter-QD distance smaller than diameter of QD. Spectroscopic evidences supporting QD-cluster are found in the Urbach energy and the carrier lifetime. Unusual absorption lines showing explicit QD dependence are observed in Fourier-transform infrared spectra, which is explained by vibrational modes of bound PPO hybridized with CsPbBr 3 -QD.
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