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<p>Developing highly efficient and stable inorganic narrow-band green-emitting phosphor is crucial for phosphor converted backlighting devices. In this study, trivalent Tb<sup>3+</sup> ions self-actived NaTb(MoO<sub>4</sub>)<sub>2</sub> (NTM) narrow-band green-emitting phosphor was prepared by a conventional high-temperature solid-state reaction method. The electronic structure, luminescence properties and luminescence thermal stability of NTM were studied through experiments and theoretical calculations. The structure of NTM was determined to be a tetragonal phase with the space group of I41/a (88). Besides, the NTM was confirmed with direct bandgap characteristics with bandgap width of 3.1231&#xa0;eV. Upon 266&#xa0;nm and 355&#xa0;nm ultraviolet (UV) excitation, the narrow-band green-emitting properties of the phosphor were investigated. Importantly, the phosphor was confirmed with well luminescence thermal stability and the thermal activation energy (<i>E</i><sub>a</sub>) was fitted to be 0.32&#xa0;eV. The work demonstrates that trivalent Tb<sup>3+</sup> ions self-actived NTM is promising as high luminescence stable narrow-band green-emitting phosphor for backlighting display applications.</p>

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Electronic structure and optical properties of Tb3+ host-sensitized NaTb(MoO4)2 narrow-band green-emitting phosphor

  • 期刊论文

  • 发表日期：

    2025年6月25日

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  • Wenqian Zou,
  • Mengyu Zhang,
  • Xichen Liu,
  • Shoujun J. Ding,
  • Yong Zou

摘要

Developing highly efficient and stable inorganic narrow-band green-emitting phosphor is crucial for phosphor converted backlighting devices. In this study, trivalent Tb3+ ions self-actived NaTb(MoO4)2 (NTM) narrow-band green-emitting phosphor was prepared by a conventional high-temperature solid-state reaction method. The electronic structure, luminescence properties and luminescence thermal stability of NTM were studied through experiments and theoretical calculations. The structure of NTM was determined to be a tetragonal phase with the space group of I41/a (88). Besides, the NTM was confirmed with direct bandgap characteristics with bandgap width of 3.1231 eV. Upon 266 nm and 355 nm ultraviolet (UV) excitation, the narrow-band green-emitting properties of the phosphor were investigated. Importantly, the phosphor was confirmed with well luminescence thermal stability and the thermal activation energy (Ea) was fitted to be 0.32 eV. The work demonstrates that trivalent Tb3+ ions self-actived NTM is promising as high luminescence stable narrow-band green-emitting phosphor for backlighting display applications.