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Eu3+-Activated Alkali Rare-Earth Double-Tungstate Nanoparticles for Near-Ultraviolet-Light-Triggered Indoor Illumination
journal contributionposted on 2022-07-14, 14:10 authored by Zhuo Tang, Linwen Jiang, Jianping Yang, Jun Tang, Anhua Wu
Phosphors for near-ultraviolet (NUV)-triggered white light-emitting diodes (LEDs) have become an attractive research topic in recent years. However, it is still difficult for phosphors to have simultaneous high luminous intensity, superior color purity, and excellent thermal stability. Hence, a series of Eu3+-activated alkali rare-earth double-tungstate nanoparticles with high luminescence intensity were prepared by a facile hydrothermal reaction method. The influence of rare-earth ions and alkali cations on the luminescence properties was investigated. Impressively, the prepared phosphors exhibit superior color purity and excellent thermal stability. Meanwhile, the emission intensity and color purity can be controlled by tuning the concentrations of Eu3+ ions. By employing the resultant nanoparticles, a fabricated LED device emitted bright warm white light with a high color rendering index (CRI) of 92.12 and a suitable correlated color temperature (CCT) of 4689 K. This work straightly confirms that the prepared phosphors are promising candidates as red-emitting components applied in NUV-triggered indoor illumination.
work straightly confirmstriggered indoor illuminationexcellent thermal stabilityattractive research topicemitting components appliedsuperior color purityhigh luminescence intensity3 + supcolor purityluminescence propertiesemitting diodesemission intensitytungstate nanoparticlesstill difficultresultant nanoparticlesrecent yearspromising candidatesearth doublealkali cations4689 k