Sensitive and Reliable Fluorescent Thermometer Based on a Red-Emitting Li2MgHfO4:Mn4+ Phosphor
Sensitive and Reliable Fluorescent Thermometer Based on a Red-Emitting Li2MgHfO4:Mn4+ Phosphor
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基于 Li2MgHfO4:Mn4 荧光粉的灵敏可靠的荧光温度计
DOI：
10.1021/acs.inorgchem.1c03971
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Yuhua Wang
中科院分区：
文献类型：
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作者：
Yonghong Qin;Fen Zhong;Yinan Bian;Shruti Hariyani;Yaxin Cao;Jakoah Brgoch;Takatoshi Seto;Mikhail G. Brik;Alok M. Srivastava;Xicheng Wang;Yuhua Wang
非接触式荧光温度计因其灵敏度和灵活性而迅速普及。然而，开发灵敏可靠的非稀土荧光温度计仍然是一项重大挑战。研制了一种新型的无稀土红色发光材料Li2MgHfO4：Mn4+，用于温度传感。结合密度泛函理论和晶场计算的实验分析表明，敏感的温度相关发光是由晶格振动引起的非辐射跃迁引起的。由于消除了表面缺陷，Li2MgHfO4：Mn4+在100次加热-冷却循环后也表现出可靠的恢复性能，这是罕见的，但对实际应用至关重要。这项研究提出了一种新的荧光温度计的设计策略，并揭示了指导敏感的温度相关发光的基本结构-性质关系。这些考虑对于开发下一代基于荧光的温度计至关重要。
Contactless fluorescent thermometers are rapidly gaining popularity due to their sensitivity and flexibility. However, the development of sensitive and reliable non-rare-earth-containing fluorescent thermometers remains a significant challenge. Here, a new rare-earth-free, red-emitting phosphor, Li2MgHfO4:Mn4+, was developed for temperature sensing. An experimental analysis combined with density functional theory and crystal field calculations reveals that the sensitive temperature-dependent luminescence arises from nonradiative transitions induced by lattice vibration. Li2MgHfO4:Mn4+also exhibits reliable recovery performance after 100 heating–cooling cycles due to the elimination of surface defects, which is rare but vital for practical application. This study puts forward a new design strategy for fluorescent thermometers and sheds light on the fundamental structure–property relationships that guide sensitive temperature-dependent luminescence. These considerations are crucial for developing next-generation fluorescence-based thermometers.