Wu Zhaojie, Li Li, Li Hong, Mei Lingsong, Xia Weidi, Yi Yousheng, Hua Yongbin
School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, P. R. China.
Department of Electronics and Information Convergence Engineering, Institute for Wearable Convergence Electronics, Kyung Hee University, Yongin-si, Gyeonggi-do, 17104, Republic of Korea.
Dalton Trans. 2022 Jun 13;51(23):9062-9071. doi: 10.1039/d2dt01120d.
Non-rare-earth Mn doped tantalate (SrGdTaO) phosphors exhibiting deep-red emission were synthesized. Afterward, the phase structure, morphology, and optical properties (, emission spectra, concentration quenching, decay curves, thermal stability, quantum yields, .) were systematically investigated. Under the optimal conditions, the SrGdTaO:0.005Mn phosphor showed an excellent color purity of 96.41% while the chromaticity coordinates were (0.721, 0.279). Besides, the optimal sample exhibited good thermal stability, and, hence, it can be packaged into light-emitting diode (LED) devices. Red-emitting LED devices could show strong far-red emission and could be suggested for plant cultivation lighting. On the other hand, white-emitting LED devices could find use in indoor illumination. Moreover, with the aid of temperature-dependent lifetime (TDL), a good relative sensing sensitivity (1.73% K at 453 K) of the luminescent thermometer was established. Herein, all the above findings suggested that SrGdTaO:Mn phosphors are a potential candidate for bifunctional platforms of solid-state lighting and luminescence lifetime thermometers.
合成了具有深红色发射的非稀土锰掺杂钽酸盐（SrGdTaO）荧光粉。随后，系统研究了其相结构、形貌和光学性质（发射光谱、浓度猝灭、衰减曲线、热稳定性、量子产率等）。在最佳条件下，SrGdTaO:0.005Mn荧光粉的色纯度优异，为96.41%，色度坐标为（0.721, 0.279）。此外，最佳样品表现出良好的热稳定性，因此可封装成发光二极管（LED）器件。发红光的LED器件可发出强烈的远红光，可用于植物栽培照明。另一方面，发白光的LED器件可用于室内照明。此外，借助于温度相关寿命（TDL），建立了发光温度计良好的相对传感灵敏度（453 K时为1.73% K）。在此，上述所有发现表明，SrGdTaO:Mn荧光粉是固态照明和发光寿命温度计双功能平台的潜在候选材料。
