Tailoring of Blue-Cyan Luminescence in Rb3Y[(P1-xSix)O4]2:Eu2+ Phosphor via Si4+-P5+ Heterovalent Substitution for Full-Spectrum Healthy Lighting

IF 9.8 1区 物理与天体物理 Q1 OPTICS
Yeping Ge, Ming Zhao, Yifei Zhao, Xinping Zhang
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引用次数: 0

Abstract

Filling the cyan gap (470–500 nm) in white light-emitting diodes (WLEDs) is crucial for full-spectrum illumination. However, the traditional approach of adding cyan phosphor to red, green, and blue phosphors can lead to reabsorption and color aberrations due to spectral overlap and varying degradation rates among the mixed phosphors. Herein, a blue-cyan-emitting phosphor (λem = 475 nm) is developed through Si4+-P5+ heterovalent substitution in blue-violet-emitting Rb3Y(PO4)2:Eu2+ phosphor (λem = 425 nm), which can serve as the blue component in WLEDs to fill the cyan gap without adding extra phosphor. Initially, Eu2+ primarily occupy the Rb2O12 sites (426 nm) in Rb3Y(PO4)2:Eu2+, with minimal occupation in the Rb1O7 sites (456 nm) and YO6 sites (522 nm). The Si4+-P5+ substitution results in a red-shift of the Eu2+@Rb1 emission peak from 456 to 475 nm and the preferred occupation of the Rb1 sites by Eu2+, synergistically achieving the blue-cyan luminescence. Employing the blue-cyan-emitting phosphor instead of the blue-violet-emitting phosphor in WLEDs significantly improves the color rendering index from 90 to 97.2, thus enhancing the overall color reproduction quality. This research demonstrates a facile composition modification method to modulate the properties of inorganic luminescent materials and provides an alternative solution for full-spectrum healthy lighting.

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来源期刊
CiteScore
14.20
自引率
5.50%
发文量
314
审稿时长
2 months
期刊介绍: Laser & Photonics Reviews is a reputable journal that publishes high-quality Reviews, original Research Articles, and Perspectives in the field of photonics and optics. It covers both theoretical and experimental aspects, including recent groundbreaking research, specific advancements, and innovative applications. As evidence of its impact and recognition, Laser & Photonics Reviews boasts a remarkable 2022 Impact Factor of 11.0, according to the Journal Citation Reports from Clarivate Analytics (2023). Moreover, it holds impressive rankings in the InCites Journal Citation Reports: in 2021, it was ranked 6th out of 101 in the field of Optics, 15th out of 161 in Applied Physics, and 12th out of 69 in Condensed Matter Physics. The journal uses the ISSN numbers 1863-8880 for print and 1863-8899 for online publications.
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