{"title":"用于 LED 应用的 LiGaAl4O8:Cr3+ 近红外荧光粉的双中心发光特性","authors":"","doi":"10.1016/j.mtphys.2024.101540","DOIUrl":null,"url":null,"abstract":"<div><p>Near-infrared (NIR) phosphor-converted light emitting diodes (NIR pc-LEDs) hold great promise for applications in night vision imaging, nondestructive analysis, and plant growth. Although some NIR phosphors have been developed in recent years, there are fewer studies on Cr<sup>3+</sup>-doped multisite luminescent phosphors. Here, we report a novel LiGaAl<sub>4</sub>O<sub>8</sub>:<em>x</em>Cr<sup>3+</sup> (LGAO:Cr<sup>3+</sup>) phosphors with double Cr<sup>3+</sup> luminescence centers. At low doping concentration, LGAO:Cr<sup>3+</sup> is dominated by the emission of Cr1. With the increase of doping concentration <em>x</em>, the Cr2 portion of emission intensity increases due to the increased probability of the energy transfer from Cr1 to Cr2. Finally, using the LGAO:0.02Cr<sup>3+</sup> NIR phosphor and a commercial 410 nm chip, a NIR pc-LED prototype with a NIR output power of 43.7 mW at 100 mA drive current and a photovoltaic conversion efficiency of 19.2 % at 10 mA was fabricated and its application in visual inspection of precise devices and angiography was demonstrated. This work provides an in-depth and careful study of the luminescent mechanism of the dual-centerd NIR phosphor and serves as a good paradigm for the development of NIR pc-LEDs.</p></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":null,"pages":null},"PeriodicalIF":10.0000,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dual center luminescence properties of LiGaAl4O8:Cr3+ near infrared phosphors for LED applications\",\"authors\":\"\",\"doi\":\"10.1016/j.mtphys.2024.101540\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Near-infrared (NIR) phosphor-converted light emitting diodes (NIR pc-LEDs) hold great promise for applications in night vision imaging, nondestructive analysis, and plant growth. Although some NIR phosphors have been developed in recent years, there are fewer studies on Cr<sup>3+</sup>-doped multisite luminescent phosphors. Here, we report a novel LiGaAl<sub>4</sub>O<sub>8</sub>:<em>x</em>Cr<sup>3+</sup> (LGAO:Cr<sup>3+</sup>) phosphors with double Cr<sup>3+</sup> luminescence centers. At low doping concentration, LGAO:Cr<sup>3+</sup> is dominated by the emission of Cr1. With the increase of doping concentration <em>x</em>, the Cr2 portion of emission intensity increases due to the increased probability of the energy transfer from Cr1 to Cr2. Finally, using the LGAO:0.02Cr<sup>3+</sup> NIR phosphor and a commercial 410 nm chip, a NIR pc-LED prototype with a NIR output power of 43.7 mW at 100 mA drive current and a photovoltaic conversion efficiency of 19.2 % at 10 mA was fabricated and its application in visual inspection of precise devices and angiography was demonstrated. This work provides an in-depth and careful study of the luminescent mechanism of the dual-centerd NIR phosphor and serves as a good paradigm for the development of NIR pc-LEDs.</p></div>\",\"PeriodicalId\":18253,\"journal\":{\"name\":\"Materials Today Physics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":10.0000,\"publicationDate\":\"2024-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Today Physics\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2542529324002165\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Today Physics","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2542529324002165","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Dual center luminescence properties of LiGaAl4O8:Cr3+ near infrared phosphors for LED applications
Near-infrared (NIR) phosphor-converted light emitting diodes (NIR pc-LEDs) hold great promise for applications in night vision imaging, nondestructive analysis, and plant growth. Although some NIR phosphors have been developed in recent years, there are fewer studies on Cr3+-doped multisite luminescent phosphors. Here, we report a novel LiGaAl4O8:xCr3+ (LGAO:Cr3+) phosphors with double Cr3+ luminescence centers. At low doping concentration, LGAO:Cr3+ is dominated by the emission of Cr1. With the increase of doping concentration x, the Cr2 portion of emission intensity increases due to the increased probability of the energy transfer from Cr1 to Cr2. Finally, using the LGAO:0.02Cr3+ NIR phosphor and a commercial 410 nm chip, a NIR pc-LED prototype with a NIR output power of 43.7 mW at 100 mA drive current and a photovoltaic conversion efficiency of 19.2 % at 10 mA was fabricated and its application in visual inspection of precise devices and angiography was demonstrated. This work provides an in-depth and careful study of the luminescent mechanism of the dual-centerd NIR phosphor and serves as a good paradigm for the development of NIR pc-LEDs.
期刊介绍：
Materials Today Physics is a multi-disciplinary journal focused on the physics of materials, encompassing both the physical properties and materials synthesis. Operating at the interface of physics and materials science, this journal covers one of the largest and most dynamic fields within physical science. The forefront research in materials physics is driving advancements in new materials, uncovering new physics, and fostering novel applications at an unprecedented pace.
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