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- Title
Synthesis of Sr<sub>2</sub>Ta<sub>2</sub>O<sub>7</sub>:Eu<sup>3+</sup> red phosphor and its luminescence characteristics.
- Authors
Chen, Yonglin; Wu, Haoyi; Li, Yanmei; Liu, Zhenpeng; Wan, Jiangyun; Hu, Yihua
- Abstract
A series of novel orange-red emitting tantalate phosphors, Sr2Ta2O7:xEu3+ (0.01 ≤ × ≤ 0.13) were successfully prepared through the solid-state method at high temperature. Under the excitation of 464 nm, Sr2Ta2O7:Eu3+ emits orange-red light at 597 nm. The PL spectra of Sr2Ta2O7:Eu3+ phosphors are ascribed to the 5D0 → 7FJ (J = 0, 1, 2, 3 and 4) transitions of Eu3+ ions. The optimal doping concentration of Eu3+ ions was 9 mol%. The optical bandgap of the host was calculated by ultraviolet-visible diffuse reflection spectra (DRS) with a value of 4.73 eV. The emission intensity of phosphors at 423 K still maintains 92% of that at room temperature, which means the material has excellent thermal stability. The chromaticity coordinates of the Sr2Ta2O7:Eu3+ located in the orange-red region (0.6403, 0.3585). Various results show that Eu3+-doped Sr2Ta2O7 phosphors have great potential in the field of phosphor conversion white light-emitting diodes (pc-WLEDs).
- Publication
Journal of Materials Science: Materials in Electronics, 2023, Vol 34, Issue 24, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-023-11187-y