Abstract Eu3+-activated Ca3Mo0.2W0.8O6 phosphors, which presented bright red emissions mainly from the 5D0 → 7F2 transition of Eu3+ ions upon the near-ultraviolet and blue light excitation, were successfully prepared by a traditional high-temperature technology. The crystal structure, phase constitution, morphology, electronic structure, photoluminescent behaviors, decay time, internal quantum efficiency and thermal stability of the resultant phosphors were investigated in detail. Under the excitation of 365, 393 and 465 nm, the optimal doping concentration was 9 mol% and the electrical multipolar interaction contributed to the non-radiative energy transfer between Eu3+ ions in Ca3Mo0.2W0.8O6 host lattices. Additionally, through using the prepared compounds, commercial blue/green-emitting phosphors and light-emitting diodes (LEDs), the fabricated white-LEDs emitted warm white light with excellent performance, such as good CIE coordinates, high color rending index and low correlated color temperature, when driven by 30 mA of injection current. Ultimately, according to the response of the decay time to the temperature, the thermometric performances of the resultant phosphors in the temperature range of 298–573 K were studied. The maximum sensor sensitivity of the studied phosphors reached up to 1.16% K−1 at 523 K. These achievements revealed that Eu3+-activated Ca3Mo0.2W0.8O6 phosphors were promising candidates for solid-state lighting and thermometer.

中文翻译：

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Eu3+ 激活的 Ca3Mo0.2W0.8O6 发红光磷光体：用于固态照明和温度计的近紫外和蓝光可激发平台

摘要 Eu3+ 激活的Ca3Mo0.2W0.8O6 荧光粉通过传统的高温技术成功制备，该荧光粉主要由Eu3+ 离子在近紫外和蓝光激发下的5D0 → 7F2 跃迁而呈现亮红色发射。详细研究了所得荧光粉的晶体结构、相组成、形貌、电子结构、光致发光行为、衰减时间、内量子效率和热稳定性。在 365、393 和 465 nm 的激发下，最佳掺杂浓度为 9 mol%，电多极相互作用有助于 Ca3Mo0.2W0.8O6 主晶格中 Eu3+ 离子之间的非辐射能量转移。此外，通过使用制备的化合物、商用蓝色/绿色荧光粉和发光二极管 (LED)，当由 30 mA 的注入电流驱动时，制造的白光 LED 发出具有优异性能的暖白光，例如良好的 CIE 坐标、高显色指数和低相关色温。最后，根据衰减时间对温度的响应，研究了所得荧光粉在 298-573 K 温度范围内的测温性能。所研究的磷光体的最大传感器灵敏度在 523 K 时达到 1.16% K-1。这些成就表明 Eu3+ 激活的 Ca3Mo0.2W0.8O6 磷光体是固态照明和温度计的有希望的候选者。根据衰减时间对温度的响应，研究了所得荧光粉在 298-573 K 温度范围内的测温性能。所研究的磷光体的最大传感器灵敏度在 523 K 时达到 1.16% K-1。这些成就表明 Eu3+ 激活的 Ca3Mo0.2W0.8O6 磷光体是固态照明和温度计的有希望的候选者。根据衰减时间对温度的响应，研究了所得荧光粉在 298-573 K 温度范围内的测温性能。所研究的磷光体的最大传感器灵敏度在 523 K 时达到 1.16% K-1。这些成就表明 Eu3+ 激活的 Ca3Mo0.2W0.8O6 磷光体是固态照明和温度计的有希望的候选者。