A novel red emitting phosphor CaSc2O4:Eu2+ for the warm white LEDs

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2024-12-26 DOI:10.1016/j.jlumin.2024.121052

Xuping Han, Xiaoyi Ma, Jia Li, Chengrun Liu, Xiaoyan Yu, Zixuan Wang, Panlai Li, Xiaojie Li, Zhijun Wang

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Abstract

A novel red emitting phosphor CaSc₂O₄:Eu²⁺ (CSO:Eu²⁺) was synthesized using a high temperature solid-state method. The crystal structure, luminescent properties, temperature characteristics and quantum efficiency of CSO:Eu²⁺ were detailed explored. Based on the crystal structure and refinement results of CaSc₂O₄, it has been confirmed that the Eu²⁺ ions occupy the Sc atomic site of octahedral hexacoordination configuration. CSO:Eu²⁺ can exhibit an broad emission with an peak at 656 nm and a full width at half maximum (FWHM) of 78 nm under the 460 nm excitation, and the internal quantum efficiency of CSO:Eu²⁺ can reach 61.5 %. A white light emitting diodes (LEDs) presented a high color rendering index (CRI) of 96.8 and a correlated color temperature (CCT) of 3959 K, which was fabricated by combining a blue LED chip, the CSO:Eu²⁺ red phosphor, the commercial Y₃(Al, Lu)₅O₁₂:Ce³⁺ yellow phosphor. Importantly, the colors of the goods appear more true and vivid under this white LED device compared to commercial white LEDs.

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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.