期刊
JOURNAL OF LUMINESCENCE
卷 252, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2022.119305
关键词
Single-phase phosphors; Rare earth; Luminescence; Energy transfer; Full-color-emitting
类别
资金
- Science and Technology Department Project of Sichuan Province
- Everest Scien- tific Research Program
- [2022YFG0114]
- [2021JDTD0013]
- [2019ZDZX0025 22ZDYF3264]
- [2020ZF11405]
This article discusses the synthesis of tunable CaZrO3 phosphors through citric acid-fueled combustion method and investigates the impact of different dopant ions on their luminescent properties, providing valuable insights for the development of W-LED devices.
A series of single-phase color-turning CaZrO3: Ln (Ln = Tb3+, Eu3+, Tb3+/Eu3+) phosphors was synthesized through citric acid-fueled combustion method. The as-prepared samples had the perovskite structure with Pnma space group and elements uniformly distributed in nanosized particles. CaZrO3: Eu3+ phosphor produced red luminescence due to the D-5(0) -> F-7(2) transition at 619 nm CaZrO3: Tb3+ phosphor produced green and blue luminescence due to the D-5(4) -> F-7(6,5) transition at 487 nm and 548 nm. Under UV irradiation at 254 nm, the CaZrO3: Ln (Ln = Tb3+, Eu3+, Tb3+/Eu3+) phosphors achieved tunable full-color emission in a wide range from blue to green, warm white, and red. The corresponding CIE coordinates were (0.2546, 0.2413), (0.3196, 0.5085), (0.3603, 0.3896) and (0.6089, 0.3844). The energy transfer from ZrO32- to Tb3+ and then to Eu3+ was determined by the dipole-dipole mechanism in CaZrO3: 0.03 Tb3+, xEu(3+) phosphors. The excellent temperature stability of CaZrO3: 0.03 Tb3+, 0.01Eu(3+) phosphor (.E = 0.2659 eV) indicates that CaZrO3: Ln (Ln = Tb3+, Eu3+, Tb3+/Eu3+) phosphors have broad application prospects in W-LED devices.
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