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Synthesis and photoluminescence properties of a novel double perovskite Ca2LaSbO6:Sm3+ phosphor for w-LEDs
Ceramics International ( IF 5.2 ) Pub Date : 2021-09-21 , DOI: 10.1016/j.ceramint.2021.09.182
Bingjie Han 1 , Jing Ren 1 , PingPing Teng 1 , JiaBao Zhu 1 , Yu Shen 1 , ZhiAng Li 1 , Xiaoliang Zhu 1 , Xinghua Yang 1
Affiliation  

At present, the combination of red, green and blue light (RGB) is one of the mainstream ways to obtain high-efficiency white light emitting diodes (w-LEDs). In this paper, we have prepared a new type of Sm3+ activated Ca2LaSbO6 (CLSO) orange-red phosphor by the high-temperature solid-phase method. The phase and morphology of the powders were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM), respectively. The luminescent properties, thermal stability of the materials have been tested and analyzed in detail. The results show that CLSO:Sm3+ phosphors have several excitation bands in the range of 320–550 nm, and the excitation peak intensity at 405 nm is the largest, indicating that the material can be excited by blue light. The emission peak is composed of 564 nm (yellow), 601 nm (orange) and 648 nm (red), emission intensity reaches the extreme value when the Sm3+ doping concentration is 5 mol%, the quenching phenomenon is due to the dipole-dipole (d-d) interaction of Sm3+ ions. The activation energy (Ea) of Sm3+ in CLSO is 0.2689 eV. The CIE chromaticity coordinates of CLSO:Sm3+ located at origin-red region. All results show that CLSO:Sm3+ phosphor has potential application value in w-LEDs field.



中文翻译:

用于 w-LED 的新型双钙钛矿 Ca2LaSbO6:Sm3+ 荧光粉的合成和光致发光性能

目前,红、绿、蓝光(RGB)组合是获得高效白光发光二极管(w-LED)的主流方式之一。本文采用高温固相法制备了一种新型Sm 3+活化Ca 2 LaSbO 6 (CLSO)橙红色荧光粉。粉末的物相和形貌分别通过 X 射线衍射 (XRD) 和场发射扫描电子显微镜 (FESEM) 进行表征。对材料的发光性能、热稳定性进行了详细的测试和分析。结果表明,CLSO:Sm 3+荧光粉在 320-550 nm 范围内有多个激发带,405 nm 处的激发峰强度最大,表明该材料可以被蓝光激发。发射峰由564 nm(黄色)、601 nm(橙色)和648 nm(红色)组成,当Sm 3+掺杂浓度为5 mol%时发射强度达到极值,猝灭现象是偶极子引起的- Sm 3+离子的偶极 (dd) 相互作用。Sm 3+在CLSO 中的活化能( E a ) 为0.2689 eV。CLSO:Sm 3+的CIE色度坐标位于原点-红色区域。所有结果表明CLSO:Sm 3+荧光粉在w-LEDs领域具有潜在的应用价值。

更新日期:2021-09-21
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