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Simultaneous Thermal Enhancement of Upconversion and Downshifting Luminescence by Negative Thermal Expansion in Nonhygroscopic ZrSc(WO4)2PO4:Yb/Er Phosphors
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2023-06-03 , DOI: 10.1021/acs.inorgchem.3c00880
Jinsheng Liao 1, 2 , Zhuo Han 1 , Fulin Lin 3 , Biao Fu 1 , Guoliang Gong 1 , Haokun Yan 1 , Haiping Huang 1 , He-Rui Wen 1 , Bao Qiu 4
Affiliation  

Thermal quenching (TQ) is still a critical challenge for lanthanide (Ln3+)-doped luminescent materials. Herein, we report the novel negative thermal expansion nonhygroscopic phosphor ZrSc(WO4)2PO4:Yb3+/Er3+. Upon excitation with a 980 nm laser, a simultaneous thermal enhancement is realized on upconversion (UC) and downshifting (DS) emissions from room temperature to 573 K. In situ temperature-dependent X-ray diffraction and photoluminescence dynamics are used to reveal the luminescence mechanism in detail. The coexistence of the high energy transfer efficiency and the promoted radiative transition probability can be responsible for the thermally enhanced luminescence. On the basis of the luminescence intensity ratio of thermally coupled energy levels 2H11/2 and 4S3/2 at different temperatures, the relative and absolute sensitivities of the targeted samples reach 1.10% K–1 and 1.21% K–1, respectively, and the low-temperature uncertainty is approximately 0.1–0.4 K on the whole temperature with a high repeatability (98%). Our findings highlight a general approach for designing a hygro-stable, thermostable, and highly efficient Ln3+-doped phosphor with UC and DS luminescence.

中文翻译:

在非吸湿性 ZrSc(WO4)2PO4:Yb/Er 荧光粉中通过负热膨胀同时热增强上转换和下转换发光

热淬火 (TQ) 仍然是镧系元素 (Ln 3+ ) 掺杂发光材料的关键挑战。在此,我们报道了新型负热膨胀不吸湿荧光粉ZrSc(WO 4 ) 2 PO 4 :Yb 3+ /Er 3+在用 980 nm 激光激发后,从室温到 573 K 的上转换 (UC) 和下转换 (DS) 发射实现了同步热增强。温度相关的 X 射线衍射和光致发光动力学用于详细揭示发光机制。高能量转移效率和促进的辐射跃迁概率的共存可能是热增强发光的原因。根据热耦合能级2 H 11/24 S 3/2在不同温度下的发光强度比,目标样品的相对和绝对灵敏度分别达到1.10% K –1和1.21% K –1, 低温不确定性在整个温度上约为 0.1-0.4 K,具有高重复性 (98%)。我们的研究结果强调了设计具有 UC 和 DS 发光的湿稳定性、热稳定性和高效 Ln 3+掺杂磷光体的一般方法。
更新日期:2023-06-03
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