Huang Dayu, Ouyang Qiuyun, Liu Bin, Chen Bingkun, Wang Yuting, Yuan Chenggang, Xiao Hui, Lian Hongzhou, Lin Jun
Key Laboratory of In-Fiber Integrated Optics, Ministry Education of China, and College of Physics and Opotoelectronic Engineering, Harbin Engineering University, Harbin 150001, China.
Dalton Trans. 2021 Apr 7;50(13):4651-4662. doi: 10.1039/d1dt00153a. Epub 2021 Mar 16.
Dual-emitting manganese ion doped LaMAlO (M = Mg, Zn) phosphors were prepared by substituting Zn/Mg with Mn and replacing Al with Mn. The LaMAlO:xMn,yMn phosphors show a narrow green emission band of the Mn ions at 514 nm and a red emission band of the Mn ions at 677 nm. In addition, the thermal stability of luminescence shows that the response of Mn and Mn to the temperature is obviously different in LaMAlO, implying the potential of the prepared phosphors as optical thermometers. The decay lifetime of Mn was changed with temperature due to the different fluorescence intensity ratios of Mn and Mn, and a dual-mode optical temperature-sensing mechanism was studied in the temperature range of -50-200 °C. The maximum relative sensitivities (S) are calculated as 3.22 and 3.13% K, respectively. The unique optical thermometric features demonstrate the application potential of LaMAlO:Mn,Mn in optical thermometry.
通过用锰取代锌/镁并用锰取代铝制备了双发射锰离子掺杂的LaMAlO（M = Mg，Zn）荧光粉。LaMAlO:xMn,yMn荧光粉在514nm处呈现锰离子的窄绿色发射带，在677nm处呈现锰离子的红色发射带。此外，发光的热稳定性表明，在LaMAlO中，锰和锰对温度的响应明显不同，这意味着所制备的荧光粉作为光学温度计具有潜力。由于锰和锰的荧光强度比不同，锰的衰减寿命随温度变化，并且在-50-200°C的温度范围内研究了双模式光学温度传感机制。最大相对灵敏度（S）分别计算为3.22和3.13% K。独特的光学测温特性证明了LaMAlO:Mn,Mn在光学测温中的应用潜力。
