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Frontiers of Optoelectronics

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Front. Optoelectron.    2024, Vol. 17 Issue (3) : 31    https://doi.org/10.1007/s12200-024-00134-2
Dual-functional application of Ca2Ta2O7: Bi3+/Eu3+ phosphors in multicolor tunable optical thermometry and WLED
Jingjing Ru1(), Bing Zhao2(), Fan Zeng1,3, Feiyun Guo4, Jinhua Liu5, Jianzhong Chen4
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
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Abstract

A series of Bi3+/Eu3+ co-doped Ca2Ta2O7 (CTO:Bi3+/Eu3+) 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 Bi3+/Eu3+ and utilizing the energy transfer from Bi3+ to Eu3+, the tunable color emission ranging from green to reddish-orange was realized. The designed CTO:0.04Bi3+/Eu3+ optical thermometers exhibit significant 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 different thermal quenching behaviors between Bi3+ and Eu3+ ions. These features indicate the potential application prospects of the prepared samples in visualized thermometer or high-temperature safety marking. Furthermore, leveraging the excellent zero-thermal-quenching performance, outstanding acid/alkali resistance, and color stability of CTO:0.04Bi3+/0.16Eu3+ 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:0.04Bi3+/0.16Eu3+ in near-UV pumped WLED devices.
Keywords Phosphor      Energy transfer      Zero-thermal-quenching      Optical thermometry      WLEDs     
Corresponding Author(s): Jingjing Ru,Bing Zhao   
Issue Date: 09 September 2024
 Cite this article:   
Jingjing Ru,Bing Zhao,Fan Zeng, et al. Dual-functional application of Ca2Ta2O7: Bi3+/Eu3+ phosphors in multicolor tunable optical thermometry and WLED[J]. Front. Optoelectron., 2024, 17(3): 31.
 URL:  
https://academic.hep.com.cn/foe/EN/10.1007/s12200-024-00134-2
https://academic.hep.com.cn/foe/EN/Y2024/V17/I3/31
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