高热稳定性紫光激发深红光荧光粉La₂MgRO_6.5 ：Sm³⁺（ R=Nb ，Ta制备及发光性质

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关键词：紫光激发；高热稳定性； Sm3+ 掺杂；深红光荧光粉中图分类号：0482.31 文献标识码：ADOI：10.37188/CJL.20250161 CSTR：32170.14.CJL.20250161

Abstract：A seriesofviolet excited deepred phosphors （ R=Nb ，Ta，x=0-0.07）were synthesized viathehigh-temperaturesolid-state method.Theregulatory efectsofsynthesis temperatureandflux typeon phasecomposition were systematicall investigated.Furthermore，the luminescence properties were comprehensively characterizedthrough excitation/emisionspectra，lifetimedecayanalysis，and temperature-dependentluminescence spectroscopy. Under 407 nm violet excitation，the phosphor exhibits intense deep-red emision with adominant emissionpeak at65Onmwithinthedeep-redspectralregion.Thermal stabilityinvestigations reveal exceptionalthermal quenching resistance，retaining 95% of its room-temperature emission intensity at 393 K.The aging test results under 85C and 85% relative humidity conditions show that the prepared samples have good chemical stability.Ultimately，through strategic incorporation of the prepared La2MgR06.5 ：Sm³（ R =Nb，Ta）deep-red phosphor into WLED devices fabricated with a410 nm violet chipand commercial blue/green/red phosphors，significant performance enhancements were achieved.Thecolor rendering index improvedfrom89.2 to94.4/93.6，while the correlated color temperature decreased from 4762 K to 3 680 K/3 425K，yielding high-quality white LED.

KeyWords：violet-excited;high thermal stability；Sm 3+ -doped；deep red phosphor：

1引言

与传统光源相比，作为第四代光源的白光发光二极管（WLED）具有亮度高、寿命长、能效高、便于生产等优点，在照明、显示和医疗领域广泛应用-3]。（剩余20061字）