Orange-red emitting Sr3LaTa3O12∶Sm3+phosphors with perovskite structure and high thermal stability for w-LEDs

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外文摘要：A novel layered perovskite tantalate phosphor Sr3LaTa3O12∶Sm3+(SLTO∶Sm3+)with orange-red emission was obtained for the first time via the solid-phase synthetic method.The phase purity,surface morphology,element distribution and luminescent properties of the SLTO∶xSm3+(x=0.01 mol％-0.30 mol％)phosphors were investigated.Under 408 nm excitation,the optimum doped SLTO∶0.10Sm3+phosphor emits orange-red light at 598 nm with the highest emission peak(4G5/2 → 6H7/2).The critical energy transfer distance is 1.687 nm.The prepared SLTO∶0.10Sm3+phosphor has excellent thermal stability with temperature quenching temperature(To.5＞500 K)and high activation energy(Ea=0.25 eV).Through calculation,the chromaticity coordinates of all samples are concentrated in the orange-red area,and the color purity reaches 99％.The fabricated white light-emitting diode(w-LED)has a good correlated color temperature(5132 K),a high Ra(89),and the CIE chromaticity coordinates(0.340,0.327).Consequently,the superiority of orange-red-emitting tantalate SLTO∶Sm3+phosphors for w-LEDs is demonstrated.

外文关键词：

TantalateSr3LaTa3O12Sm3+LuminescenceLEDRare earths

作者：

Xiaopeng Hu、Anlin Zhang、Yufeng Du、Li Zhou、Changlin Li、Jingjing Lian、Zhequan Zou、Xuan Ouyang、Bin Deng、Lianwu Xie、Ruijin Yu

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作者单位：

College of Chemistry Biology and Environmental Engineering,Xiangnan University,Chenzhou,423043,China

College of Sciences,Central South University of Forestry and Technology,Changsha,410004,China

College of Chemistry & Pharmacy,Northwest A&F University,Yangling,712100,China

Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application,Xiangnan University,Chenzhou,423043,China

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基金：

Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds and ApplicationsConstruction Program of the Key Discipline of the Education Department in Hunan ProvinceNatural Science Foundation of Hunan ProvinceNatural Science Foundation of Shaanxi ProvinceUndergraduate Innovation Fund of Northwest A&F University,ChinaUndergraduate Innovation Fund of Northwest A&F University,ChinaUndergraduate Innovation Fund of Northwest A&F University,ChinaUndergraduate Innovation Fund of Northwest A&F University,ChinaUndergraduate Innovation Fund of Northwest A&F University,ChinaUndergraduate Innovation Fund of Northwest A&F University,ChinaUndergraduate Innovation Fund of Northwest A&F University,ChinaUndergraduate Innovation Fund of Northwest A&F University,China

项目编号：

2019XGJSKFJJ0118A4652023JJ310002022NY-224202210712058202210712050S202210712394202110712190202110712188S202110712707S202010712314S20201

出版年：

2024

DOI：

10.1016/j.jre.2023.05.011

稀土学报(英文版)

中国稀土学会

稀土学报(英文版)

CSTPCDEI

影响因子：1.3

ISSN：1002-0721

年,卷(期)：2024.42(3)

参考文献量39