发光学报2024，Vol.45Issue(4)：591-602,12.DOI:10.37188/CJL.20240016
高效稳定的Cr3+离子激活石榴石型宽带近红外荧光粉的发光特性及应用研究
Highly Efficient and Thermally Stable Cr3+-activated Garnet Phosphors for Application in Broadband NIR pc-LEDs
摘要
Abstract
Broadband near-infrared(NIR)light sources based on NIR phosphor-converted light-emitting diodes(NIR pc-LEDs)are desirable for NIR spectroscopy applications,while desiring thermally stable NIR phosphors has posed a great challenge.Herein,we report a comprehensive study into the synthesis,structural,and photolumines-cence properties of Cr3+-activated Gd3Ga5O12 garnet phosphors with high efficiency and superior thermal stability.Up-on 450 nm excitation,it produces a broadband NIR emission in the 620-1 100 nm range with a maximum at 740 nm and a FWHM of 97 nm.Remarkably,the Gd3Ga5O12∶0.12Cr3+ phosphor exhibits high internal quantum efficiency of 54.6%and outstanding thermal stability(106%@425 K).Furthermore,spectral broadening and thermal stability enhancement are achieved by the codoping of Nd3+/Yb3+ via efficient energy migration between Cr3+ and Nd3+/Yb3+ ions.Lastly,an NIR pc-LED device fabricated using as-prepared phosphors yields a high NIR output power of 55.5 mW under 320 mA input current,demonstrating their potential application in high-power NIR pc-LEDs.关键词
铬/宽带近红外/石榴石结构/热稳定性/近红外LEDKey words
chromium/broadband NIR/garnet structure/thermal stability/NIR pc-LEDs分类
数理科学引用本文复制引用
卜庆州,汪永杰,李东朔,严应菊,常瑛,相国涛,周贤菊..高效稳定的Cr3+离子激活石榴石型宽带近红外荧光粉的发光特性及应用研究[J].发光学报,2024,45(4):591-602,12.基金项目
国家自然科学基金(12004062) （12004062）
重庆市自然科学基金(cstc2021jcyj-msxmX0277,CSTB2022NSCQ-MSX0366,sl202100000301) （cstc2021jcyj-msxmX0277,CSTB2022NSCQ-MSX0366,sl202100000301）
重庆市重庆市教育委员会科学技术研究项目(KJZD-K202300612,KJQN202100615,KJQN202100640)Supported by National Natural Science Foundation of China(12004062) （KJZD-K202300612,KJQN202100615,KJQN202100640）
Natural Science Foundation of Chongqing(cstc2021jcyj-msxmX0277,CSTB2022NSCQ-MSX0366,sl202100000301) （cstc2021jcyj-msxmX0277,CSTB2022NSCQ-MSX0366,sl202100000301）
The Science and Technology Research Program of Chongqing Mu-nicipal Education Commission(KJZD-K202300612,KJQN202100615,KJQN202100640) （KJZD-K202300612,KJQN202100615,KJQN202100640）
