期刊
RSC ADVANCES
卷 7, 期 38, 页码 23751-23758出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra02721d
关键词
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资金
- NSFC (National Natural Science Foundation of China) [11104023, 11374044, 51672103]
- Natural Science Foundation of Liaoning Province [2015020190]
- High-level personnel in Dalian innovation support program [2016RQ037]
- Open Fund of the State Key Laboratory on Integrated Optoelectronics [IOSKL2015KF27]
- Fundamental Research Funds for the Central Universities [3132017056, 3132016333]
A series of YNbO4:Er3+ phosphors with various Er3+ concentrations was synthesized via a traditional high temperature, solid-state reaction method. XRD Rietveld refinements based on the XRD data were carried out to study the phase purity and crystal structure of the as-prepared samples. The results revealed that single monoclinic phase YNbO4 phosphors were obtained. The influence of the Er3+ concentration on the spectroscopic properties and temperature sensing in YNbO4:Er3+ phosphors were systematically studied. Different quenching concentrations were found in down-conversion and up-conversion luminescence processes. From lasers working current dependent up-conversion luminescence spectra, it was confirmed that two and three photon processes were responsible for both the green and the red up-conversion emissions, respectively, excited by 980 and 1550 nm lasers, which have no apparent dependence on Er3+ ion concentration. However, the Er3+ concentration had significant influences on the temperature sensing sensitivity of Er3+ ions, and the results showed that YNbO4 phosphors doped with low concentrations of Er3+ ions had high temperature sensing sensitivity and could be applied in temperature detection applications, particularly in high temperature environments.
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