Reshmi T. Parayil, Santosh K. Gupta, Malini Abraham, Deepak Tyagi, Subrata Das, Mohit Tyagi, N. S. Rawat and Manoj Mohapatra
{"title":"用于荧光粉转换白光发光二极管的明亮持久的绿色发光 MgGa2O4:Mn2+","authors":"Reshmi T. Parayil, Santosh K. Gupta, Malini Abraham, Deepak Tyagi, Subrata Das, Mohit Tyagi, N. S. Rawat and Manoj Mohapatra","doi":"10.1039/D4DT02960G","DOIUrl":null,"url":null,"abstract":"<p >Narrow band green emitting phosphors have gained widespread attention due to their application in white light emitting diode (wLED) backlight displays. Commercial backlight displays have a broad band green phosphor which limits their performance. In this work, bright, narrow and thermally stable green emitting MgGa<small><sub>2</sub></small>O<small><sub>4</sub></small>:Mn<small><sup>2+</sup></small> (MGO-Mn) has been synthesized. Time-resolved emission spectroscopy suggested that Mn<small><sup>2+</sup></small> ions are distributed at both Mg<small><sup>2+</sup></small> and Ga<small><sup>3+</sup></small> sites of the MGO spinel, which resulted in a high internal quantum efficiency of 63%. The colour purity of MGO-Mn (76.4%) superseded that of the commercial green phosphor β-SiAlON:Eu<small><sup>2+</sup></small> (59.12%). Doping-induced creation of oxygen vacancies endows MGO-Mn with excellent persistent luminescence with a time duration of more than 900 s upon 4 min charging with 270 nm UV light and persistent radioluminescence of more than 6000 s when charged with X-rays for 1 min. Finally, tunable white LEDs (cool and neutral white LEDs) are fabricated by combining the RGB mixture of the green phosphor with commercial red and blue phosphors along with a 280 nm UV LED chip. This work also showcases the importance of different annealing atmospheres in the photoluminescence and persistent luminescence of the MGO-Mn phosphor.</p>","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":" 3","pages":" 1038-1051"},"PeriodicalIF":3.5000,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Bright and persistent green emitting MgGa2O4:Mn2+ for phosphor converted white light emitting diodes†\",\"authors\":\"Reshmi T. Parayil, Santosh K. Gupta, Malini Abraham, Deepak Tyagi, Subrata Das, Mohit Tyagi, N. S. Rawat and Manoj Mohapatra\",\"doi\":\"10.1039/D4DT02960G\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Narrow band green emitting phosphors have gained widespread attention due to their application in white light emitting diode (wLED) backlight displays. Commercial backlight displays have a broad band green phosphor which limits their performance. In this work, bright, narrow and thermally stable green emitting MgGa<small><sub>2</sub></small>O<small><sub>4</sub></small>:Mn<small><sup>2+</sup></small> (MGO-Mn) has been synthesized. Time-resolved emission spectroscopy suggested that Mn<small><sup>2+</sup></small> ions are distributed at both Mg<small><sup>2+</sup></small> and Ga<small><sup>3+</sup></small> sites of the MGO spinel, which resulted in a high internal quantum efficiency of 63%. The colour purity of MGO-Mn (76.4%) superseded that of the commercial green phosphor β-SiAlON:Eu<small><sup>2+</sup></small> (59.12%). Doping-induced creation of oxygen vacancies endows MGO-Mn with excellent persistent luminescence with a time duration of more than 900 s upon 4 min charging with 270 nm UV light and persistent radioluminescence of more than 6000 s when charged with X-rays for 1 min. Finally, tunable white LEDs (cool and neutral white LEDs) are fabricated by combining the RGB mixture of the green phosphor with commercial red and blue phosphors along with a 280 nm UV LED chip. This work also showcases the importance of different annealing atmospheres in the photoluminescence and persistent luminescence of the MGO-Mn phosphor.</p>\",\"PeriodicalId\":71,\"journal\":{\"name\":\"Dalton Transactions\",\"volume\":\" 3\",\"pages\":\" 1038-1051\"},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2024-11-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Dalton Transactions\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2025/dt/d4dt02960g\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Dalton Transactions","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/dt/d4dt02960g","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
Bright and persistent green emitting MgGa2O4:Mn2+ for phosphor converted white light emitting diodes†
Narrow band green emitting phosphors have gained widespread attention due to their application in white light emitting diode (wLED) backlight displays. Commercial backlight displays have a broad band green phosphor which limits their performance. In this work, bright, narrow and thermally stable green emitting MgGa2O4:Mn2+ (MGO-Mn) has been synthesized. Time-resolved emission spectroscopy suggested that Mn2+ ions are distributed at both Mg2+ and Ga3+ sites of the MGO spinel, which resulted in a high internal quantum efficiency of 63%. The colour purity of MGO-Mn (76.4%) superseded that of the commercial green phosphor β-SiAlON:Eu2+ (59.12%). Doping-induced creation of oxygen vacancies endows MGO-Mn with excellent persistent luminescence with a time duration of more than 900 s upon 4 min charging with 270 nm UV light and persistent radioluminescence of more than 6000 s when charged with X-rays for 1 min. Finally, tunable white LEDs (cool and neutral white LEDs) are fabricated by combining the RGB mixture of the green phosphor with commercial red and blue phosphors along with a 280 nm UV LED chip. This work also showcases the importance of different annealing atmospheres in the photoluminescence and persistent luminescence of the MGO-Mn phosphor.
期刊介绍:
Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.