发光学报2025，Vol.46Issue(11)：2063-2074,12.DOI:10.37188/CJL.20250161
高热稳定性紫光激发深红光荧光粉La2MgRO6.5:Sm3+(R=Nb,Ta)制备及发光性质
Synthesis and Luminescence Properties of Highly Thermally Stable Violet Excited Deep Red Emitting La2MgRO6.5:Sm3+(R=Nb,Ta)Phosphors
摘要
Abstract
A series of violet excited deep red phosphors La2MgRO6.5:xSm3+(R=Nb,Ta,x=0-0.07)were synthe-sized via the high-temperature solid-state method.The regulatory effects of synthesis temperature and flux type on phase composition were systematically investigated.Furthermore,the luminescence properties were comprehensively characterized through excitation/emission spectra,lifetime decay analysis,and temperature-dependent luminescence spectroscopy.Under 407 nm violet excitation,the phosphor exhibits intense deep-red emission with a dominant emis-sion peak at 650 nm within the deep-red spectral region.Thermal stability investigations reveal exceptional thermal quenching resistance,retaining 95％of its room-temperature emission intensity at 393 K.The aging test results un-der 85℃ and 85％relative humidity conditions show that the prepared samples have good chemical stability.Ulti-mately,through strategic incorporation of the prepared La2MgRO6.5:Sm3+(R=Nb,Ta)deep-red phosphor into WLED devices fabricated with a 410 nm violet chip and commercial blue/green/red phosphors,significant perfor-mance enhancements were achieved.The color rendering index improved from 89.2 to 94.4/93.6,while the corre-lated color temperature decreased from 4 762 K to 3 680 K/3 425 K,yielding high-quality white LED.关键词
紫光激发/高热稳定性/Sm3+掺杂/深红光荧光粉Key words
violet-excited/high thermal stability/Sm3+-doped/deep red phosphors分类
数理科学引用本文复制引用
王瀚铂,董浪平,侯京山,杨帅,房永征..高热稳定性紫光激发深红光荧光粉La2MgRO6.5:Sm3+(R=Nb,Ta)制备及发光性质[J].发光学报,2025,46(11):2063-2074,12.基金项目
国家重点研发计划(2021YFB3500500,2021YFB3500502) （2021YFB3500500,2021YFB3500502）
上海市青年科技英才扬帆计划(23YF1446100) （23YF1446100）
国家自然科学基金(52302188,52172150)Supported by National Key Research and Development Program of China(2021YFB3500500,2021YFB3500502) （52302188,52172150）
Shanghai Sailing Program(23YF1446100) （23YF1446100）
National Natural Science Foundation of China(52302188,52172150) （52302188,52172150）
