Ran Weiguang, Noh Hyeon Mi, Park Sung Heum, Lee Bo Ram, Kim Jung Hwan, Jeong Jung Hyun, Shi Jinsheng, Liu Guangzeng
Department of Physics, Pukyong National University Busan 608-737 South Korea
Department of Chemistry and Pharmaceutical Science, Qingdao Agricultural University Qingdao 266109 People's Republic of China.
RSC Adv. 2019 Mar 4;9(13):7189-7195. doi: 10.1039/c8ra10242b. eCollection 2019 Mar 1.
Realization of simultaneous, efficient bifunctional application of thermochromic phosphors on light emitting diodes (LEDs) and as ratiometric thermometers is significant. Herein, doped Er ions are introduced as an activator into double perovskite LiLaMgWO host lattice. The developed phosphors can be efficiently excited by a near-ultraviolet LED chip and show bright green emission, mainly at 527 and 543 nm, as well as very low thermal quenching. Their chemical stability is studied, demonstrating excellent application potentials. Furthermore, the temperature sensing properties of LiLaMgWO:0.01Er were analyzed in the wide range of 303-483 K and show a good exponential relationship between ratiometric intensity and temperature ( > 0.999), as well as high sensitivity (2.24% K). Such a system not only optimizes the performance in solid light emitting but also provides an excellent platform for designing high-sensitivity optical thermometry.
实现热致变色磷光体在发光二极管（LED）上同时高效的双功能应用并用作比率温度计具有重要意义。在此，将掺杂的铒离子作为激活剂引入双钙钛矿LiLaMgWO主体晶格中。所开发的磷光体可以被近紫外LED芯片高效激发，并显示出明亮的绿色发射，主要在527和543nm处，以及非常低的热猝灭。研究了它们的化学稳定性，证明了其优异的应用潜力。此外，在303 - 483K的宽温度范围内分析了LiLaMgWO:0.01Er的温度传感特性，结果表明比率强度与温度之间呈现良好的指数关系（>0.999），以及高灵敏度（2.24% K）。这样的系统不仅优化了固体发光性能，还为设计高灵敏度光学测温提供了一个优异的平台。
