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Effect of Li+, La3+ co-doping on the photoluminescence enhancement of Sr3AlO4F:Sm3+ orange-red-emitting phosphor for white light-emitting diodes
Materials Today Communications ( IF 3.8 ) Pub Date : 2021-09-20 , DOI: 10.1016/j.mtcomm.2021.102806
Jia Zhou 1 , Ning Sun 2 , Zeliang Qiu 1 , Xue Huang 1 , Xiaomeng Wang 1 , Wentao Zhang 1
Affiliation  

A series of Sr3AlO4F:Sm3+, La3+, Li+ orange-red-emitting phosphors were synthesized via a solid-state reaction with charge compensator Li+ co-doping for luminescence enhancement. The X-ray diffraction results demonstrated that all samples were consistent with standard Sr3AlO4F structure belonging to tetragonal phase with I4/mcm space group. The effects of La3+ co-doping and Li+ co-doping on the structure and luminescence properties of Sr3AlO4F:Sm3+ were investigated. The emission spectrum of Sm3+-doped phosphors was composed of several emission peaks at 565 nm (4G5/26H5/2), 602 nm (4G5/26H7/2) and 650 nm (4G5/26H9/2), respectively. After co-doping La3+, the luminescence intensity of Sr3AlO4F:Sm3+, La3+ sample was elevated to 1.46 times of that of Sr3AlO4F:Sm3+ phosphor, which is in consequence of the environmental effect of crystal field around luminescence center. Furthermore, depend on charge compensation effect, the luminescence intensity of Sr3AlO4F:Sm3+, La3+, Li+ phosphor was further enhanced by 1.48 times higher than that of Sr3AlO4F:Sm3+, La3+ phosphor. A w-LEDs device was packaged via coating the as-prepared phosphor on n-UV chip of 395 nm with commercial phosphors. These results indicated that there is a potential application for Sr3AlO4F:Sm3+, La3+, Li+ phosphor as orange-red component in w-LEDs.



中文翻译:

Li+、La3+共掺杂对白光二极管用Sr3AlO4F:Sm3+橙红色荧光粉光致发光增强的影响

通过与电荷补偿剂Li +共掺杂的固态反应合成了一系列Sr 3 AlO 4 F:Sm 3+、La 3+、Li +橙红色荧光粉,以增强发光。X射线衍射结果表明,所有样品均符合标准的Sr 3 AlO 4 F结构,属于四方相I 4 /mcm空间群。La 3+共掺杂和Li +共掺杂对Sr 3 AlO 4 F:Sm 3+结构和发光性能的影响被调查。Sm 3+掺杂荧光粉的发射光谱由565 nm ( 4 G 5/26 H 5/2 )、602 nm ( 4 G 5/26 H 7/2 ) 和650 nm 处的几个发射峰组成。nm ( 4 G 5/26 H 9/2 ),分别。共掺杂La 3+ 后,Sr 3 AlO 4 F:Sm 3+ , La 3+样品的发光强度提高到Sr 3 AlO 4 F:Sm的1.46倍3+荧光粉,这是发光中心周围晶体场环境效应的结果。此外,依赖于电荷补偿的效果,Sr的发光强度3的AlO 4 F:钐3+,拉3+,李+荧光体进一步通过1.48倍增强比Sr中更高3的AlO 4 F:钐3+,拉3+磷。甲瓦特-LEDs设备经涂覆上的商业荧光395nm的正UV芯片所制备的磷光体封装。这些结果表明 Sr 3 AlO 4 F:Sm 3+有潜在的应用, La 3+ , Li +荧光粉作为w -LED 中的橙红色成分。

更新日期:2021-09-28
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