Abstract A double-perovskite Sr3TeO6:Eu3+ red phosphor was successfully prepared and confirmed to be a single phase through X-ray diffraction. Under an optimal excitation wavelength (394 nm), the Sr3TeO6:Eu3+ phosphor emitted intense red light at 617 nm, which corresponded to 5D0→7F2 transition. When the concentration of Eu3+ exceeded the optimal doping concentration (25 mol%), concentration quenching occurred because of the interactions among the nearest neighbor ions. The phosphor exhibited excellent thermal stability, and the Ea value was 0.27 eV. In accordance with Judd–Ofelt theory, the low symmetry of Eu3+ ions was confirmed, and it resulted in a color purity of up to 99.5%–99.8%. Among the charge compensators (Li+, Na+, and K+), the Na+ ions had the best charge compensation effect. The luminescence intensity of Sr3TeO6:Eu3+, Na+ was approximately 2.06 times that of Sr3TeO6:Eu3+ and 2.25 times that of commercial phosphor (Y2O3:Eu3+). The fabricated red LED has the potential to be used for plant and herb cultivation. A white light–emitting diode (w–LED) was successfully prepared, and related parameters were established. The Ra value of the prepared w–LED was as high as 91, and R9 was 5.7 times that of a commercial w–LED. These characteristics indicate that phosphors have potential in the solid-state lighting field.

中文翻译：

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电荷补偿剂（Li+、Na+、K+）对Sr3TeO6:Eu3+红色荧光粉发光性能的影响

摘要 成功制备了双钙钛矿Sr3TeO6:Eu3+红色荧光粉，并通过X射线衍射证实为单相。在最佳激发波长 (394 nm) 下，Sr3TeO6:Eu3+ 荧光粉发出 617 nm 的强红光，对应于 5D0→7F2 跃迁。当 Eu3+ 的浓度超过最佳掺杂浓度 (25 mol%) 时，由于最近邻离子之间的相互作用而发生浓度猝灭。该荧光体表现出优异的热稳定性，Ea值为0.27eV。根据 Judd-Ofelt 理论，证实了 Eu3+ 离子的低对称性，导致色纯度高达 99.5%–99.8%。在电荷补偿剂（Li+、Na+ 和 K+）中，Na+ 离子的电荷补偿效果最好。Sr3TeO6:Eu3+的发光强度，Na+ 大约是 Sr3TeO6:Eu3+ 的 2.06 倍和商业磷光体 (Y2O3:Eu3+) 的 2.25 倍。制造的红色 LED 有可能用于植物和药草种植。成功制备了白光发光二极管（w-LED），并建立了相关参数。制备的 w-LED 的 Ra 值高达 91，R9 是商业 w-LED 的 5.7 倍。这些特性表明荧光粉在固态照明领域具有潜力。是商用 w-LED 的 7 倍。这些特性表明荧光粉在固态照明领域具有潜力。是商用 w-LED 的 7 倍。这些特性表明荧光粉在固态照明领域具有潜力。