{"title":"Multicolor luminescence and afterglow from Cs2NaScCl6:Sb3+,Mn2+ crystals†","authors":"Xiaojia Wang, Wei Zheng, Xiangzhou Zhang, Xiangxiang Chen and Yuhai Zhang","doi":"10.1039/D4QI02019G","DOIUrl":null,"url":null,"abstract":"<p >In contrast to single-band emitting phosphors, dual-band emitting phosphors provide a versatile tool for ratio-metric color tuning, enabling a wide color gamut and ensuing applications in information encryption and the anti-counterfeiting area. Here, a double perovskite, Cs<small><sub>2</sub></small>NaScCl<small><sub>6</sub></small>:<em>x</em>Mn<small><sup>2+</sup></small> single crystals, was grown by a hydrothermal method. Pristine Cs<small><sub>2</sub></small>NaScCl<small><sub>6</sub></small> crystals exhibited a pure blue emission band originating from the self-trapped excitons. Upon doping with Mn<small><sup>2+</sup></small>, the crystals exhibited a dual-band emission profile, consisting of both STE and Mn<small><sup>2+</sup></small> emissions. To this end, the ratio of two bands was manipulated with Mn<small><sup>2+</sup></small>-doping concentration, rendering a wide color gamut from blue to red. Interestingly, co-doping with Sb<small><sup>3+</sup></small> ions significantly enhanced the overall photoluminescence, boosting the quantum yield from 8.8% to up to 62.4%. Such an enhancement is attributed to an efficient energy transfer process from the STE to Mn<small><sup>2+</sup></small> based on an investigation of photoluminescence lifetime. Importantly, these crystals exhibited an intriguing afterglow after X-ray excitation, with a duration exceeding 3000 s. This remarkable phenomenon opens up many new possibilities for their application in the advanced anti-counterfeiting area.</p>","PeriodicalId":79,"journal":{"name":"Inorganic Chemistry Frontiers","volume":" 22","pages":" 8123-8129"},"PeriodicalIF":6.1000,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Inorganic Chemistry Frontiers","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/qi/d4qi02019g","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
In contrast to single-band emitting phosphors, dual-band emitting phosphors provide a versatile tool for ratio-metric color tuning, enabling a wide color gamut and ensuing applications in information encryption and the anti-counterfeiting area. Here, a double perovskite, Cs2NaScCl6:xMn2+ single crystals, was grown by a hydrothermal method. Pristine Cs2NaScCl6 crystals exhibited a pure blue emission band originating from the self-trapped excitons. Upon doping with Mn2+, the crystals exhibited a dual-band emission profile, consisting of both STE and Mn2+ emissions. To this end, the ratio of two bands was manipulated with Mn2+-doping concentration, rendering a wide color gamut from blue to red. Interestingly, co-doping with Sb3+ ions significantly enhanced the overall photoluminescence, boosting the quantum yield from 8.8% to up to 62.4%. Such an enhancement is attributed to an efficient energy transfer process from the STE to Mn2+ based on an investigation of photoluminescence lifetime. Importantly, these crystals exhibited an intriguing afterglow after X-ray excitation, with a duration exceeding 3000 s. This remarkable phenomenon opens up many new possibilities for their application in the advanced anti-counterfeiting area.