A novel dual-excitation and dual-emission (DE2) CaS:EuCe-CN@g-C3N4 phosphor with enhanced thermal stability and humidity resistance

IF 3.3 3区物理与天体物理 Q2 OPTICS Journal of Luminescence Pub Date : 2025-03-07 DOI:10.1016/j.jlumin.2025.121180

Mei Peng , Jiaen Xu , Shaoai Li , Zhongxian Qiu , Qinghua Mi , Wenli Zhou , Jilin Zhang , Liping Yu , Jing Xu , Shixun Lian

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Abstract

A CaS:Eu²⁺,Ce³⁺ (abbreviated as CaS:EuCe) red phosphor has been employed in the fabrication of light-conversion films (LCFs) for utilization in greenhouses. This phosphor demonstrates superior green-to-red (GTR) spectral conversion capabilities. However, its poor chemical and thermal stability seriously restricts its use in agricultural settings for ultra-long life (>6 years) LCFs. In this study, a straightforward solid-state method coating strategy is proposed for the development of core-shell-structured phosphors. The resultant phosphors exhibit enhanced dual-excitation and dual-emission (DE²) luminescent properties, where the CaS:EuCe core generates a red emission, whereas a blue emission is derived from the graphitic carbon nitride (g-C₃N₄) shell. Furthermore, the surface-coated alkaline earth sulfide-based phosphors exhibit remarkable humidity resistance and thermal stability. The methodology presented here not only improves phosphor performance but also unlocks a wide array of potential applications.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.