Dual‑functional application of Ca_(2)Ta_(2)O_(7):Bi^(3+)/Eu^(3+)phosphors in multicolor tunable optical thermometry and WLED  

作　　者：Jingjing Ru Bing Zhao Fan Zeng Feiyun Guo Jinhua Liu Jianzhong Chen 

机构地区：[1]College of New Energy and Materials,Fujian Province University Key Laboratory of Green Energy and Environment Catalysis,Ningde Normal University,Ningde 352100,China [2]College of Mechanical and Electrical Engineering,Ningde Normal University,Ningde 352100,China [3]School of Environment and Resources,School of Carbon Neutral and Modern Industry,Fujian Normal University,Fuzhou 350007,China [4]College of Chemistry,Fuzhou University,Fuzhou 350108,China [5]School of Pharmacy and Medical Technology,Key Laboratory of Pharmaceutical Analysis and Laboratory Medicine of Fujian Province,Putian University,Putian 351100,China

出　　处：《Frontiers of Optoelectronics》2024年第3期133-149,共17页光电子前沿（英文版）

基　　金：the fnancial support of Innovative Research Team of Ningde Normal University(No.2023T03);the Natural Science Foundation of Fujian Province(No.2021J011149);Fujian Provincial Department of Education(No.JAT210469,JAT220282).

摘　　要：A series of Bi^(3+)/Eu^(3+)co-doped Ca_(2)Ta_(2)O_(7)(CTO:Bi^(3+)/Eu^(3+))phosphors were prepared by high-temperature solid-state method for dual-emission center optical thermometers and white light-emitting diode(WLED)device.By modulating the doping ratio of Bi^(3+)/Eu^(3+)and utilizing the energy transfer from Bi^(3+)to Eu^(3+),the tunable color emission ranging from green to reddish-orange was realized.The designed CTO:0.04Bi^(3+)/Eu^(3+)optical thermometers exhibit signifcant thermochromism,superior stability,and repeatability,with maximum sensitivities of Sa=0.055 K^(−1)(at 510 K)and Sr=1.298%K^(−1)(at 480 K)within the temperature range of 300−510 K,owing to the diferent thermal quenching behaviors between Bi^(3+)and Eu^(3+)ions.These features indicate the potential application prospects of the prepared samples in visualized thermometer or hightemperature safety marking.Furthermore,leveraging the excellent zero-thermal-quenching performance,outstanding acid/alkali resistance,and color stability of CTO:0.04Bi^(3+)/0.16Eu^(3+)phosphor,a WLED device with a high Ra value of 95.3 has been realized through its combination with commercially available blue and green phosphors,thereby demonstrating the potential application of CTO:0.04Bi^(3+)/0.16Eu^(3+)in near-UV pumped WLED devices.

关 键 词：WLED devices.Keywords Phosphor Energy transfer Zero-thermal-quenching Optical thermometry WLEDs 

分 类 号：TQ422[化学工程] TN312.8[电子电信—物理电子学]