In this study, we explored the potential of Sm3+/Er3+-doped Ca2Ga2GeO7 (CGGO:RE, RE = Sm/Er) as an innovative phosphor, harnessing its versatile photoluminescence properties that depend on various factors, including the excitation wavelength, time, and temperature. Our CGGO:Sm and CGGO:Er samples exhibited promising green and red emissions under UV/Near-UV (NUV) excitation and chromatic changes depending on the excitation wavelength. These color-changing characteristics hold promise for applications in the fields of NUVLEDs and optoelectronics. Furthermore, we observed a significant change in the emission hues of CGGO:Sm as a function of time. We suggest that this moment-color change can be utilized in optical chronometry. Additionally, outstanding thermometric behavior was observed in the upconversion spectra of CGGO:Er. Interestingly, the temperature-dependent behaviors of the luminescent peaks were inconsistent, increasing, constant, or decreasing, which successfully enabled remarkable thermometric performance. Our findings on the multi-metric luminescence properties of CGGO:RE demonstrated the potential of this material to be applied in various fields and highlight its versatility.

中文翻译：

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Sm3+/Er3+ 掺杂 Ca2Ga2GeO7 的多测量发光特性：激发、时间和温度


在这项研究中，我们探索了 Sm3+/Er3+ 掺杂的 Ca2Ga2GeO7（CGGO:RE，RE = Sm/Er）作为创新荧光粉的潜力，利用其取决于各种因素的多功能光致发光特性，包括激发波长、时间和温度。我们的 CGGO:Sm 和 CGGO:Er 样品在紫外/近紫外 (NUV) 激发下表现出有前景的绿光和红光发射，并且根据激发波长发生颜色变化。这些变色特性为 NUVLED 和光电领域的应用带来了希望。此外，我们观察到 CGGO:Sm 的发射色调随时间发生显着变化。我们建议这种瞬间颜色变化可用于光学计时。此外，在 CGGO:Er 的上转换光谱中观察到出色的测温行为。有趣的是，发光峰的温度依赖性行为不一致、增加、恒定或减少，这成功地实现了卓越的测温性能。我们对 CGGO:RE 多度量发光特性的研究结果证明了该材料在各个领域的应用潜力，并凸显了其多功能性。