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Luminescence properties of a green-emitting mechanoluminescent phosphor CaSrGa4O8:xTb3+ without pre-excitation.

ABSTRACT: In this study, both mechanoluminescence (ML) and long persistent luminescence (LPL) characteristics were first observed in CaSrGa4O8 doped with Tb3+ ions, which confirmed that CaSrGa4O8 is a high-quality host for luminescent material research. Notably, the samples show stronger mechanoluminescent intensity with increasing Tb3+ doping. Additionally, the introduction of Tb3+ led to a shift of the thermoluminescence peak towards higher temperatures and a substantial increase in its intensity, suggesting that Tb3+ doping enhances the overall trap concentration and introduces deeper trap energy levels. Presumably, the free carriers in the system recombine upon mechanical stimulation, releasing energy that is transferred to Tb3+ ions. Investigations into the intrinsic structure, matrix effects, and trap evolution of the material confirmed that deep and shallow traps are responsible for the observed ML and LPL phenomena, respectively. The elucidation of the unique luminescent properties of the material provides us with some guidance for the development of new multi-functional luminescent materials.

SUBMITTER: Shi R 

PROVIDER: S-EPMC10986777 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature

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Luminescence properties of a green-emitting mechanoluminescent phosphor CaSrGa<sub>4</sub>O<sub>8</sub>:<i>x</i>Tb<sup>3+</sup> without pre-excitation.

Shi Rui R   Liu Wei W   Li Lin L   Li Huan H   Zhang Zhijun Z   Rao Guanghui G   Zhao Jingtai J  

RSC advances 20240301 15

In this study, both mechanoluminescence (ML) and long persistent luminescence (LPL) characteristics were first observed in CaSrGa<sub>4</sub>O<sub>8</sub> doped with Tb<sup>3+</sup> ions, which confirmed that CaSrGa<sub>4</sub>O<sub>8</sub> is a high-quality host for luminescent material research. Notably, the samples show stronger mechanoluminescent intensity with increasing Tb<sup>3+</sup> doping. Additionally, the introduction of Tb<sup>3+</sup> led to a shift of the thermoluminescence peak t  ...[more]

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