Ce3+-based phosphor converter enabling laser lighting to attain both high CRI and high luminous efficacy

Xinrong Chen; Shaoda Yuan; Yanghan Guo; Bingguo Liu; Shiqing Pang; Le Zhang; Baoli Du; Carsten Dam-Hansen; Jian Xu; Ole B. Jensen

doi:10.1016/j.ceramint.2023.10.070

Ce³⁺-based phosphor converter enabling laser lighting to attain both high CRI and high luminous efficacy

Xinrong Chen, Shaoda Yuan, Yanghan Guo, Bingguo Liu^*, Shiqing Pang, Le Zhang^*, Baoli Du, Carsten Dam-Hansen, Jian Xu^*, Ole B. Jensen

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Eu²⁺ doped-CaAlSiN₃ possesses broad red emission, enabling a phosphor-converted lighting device to achieve a high color rendering index (CRI) and proper color temperature. However, CaAlSiN₃:Eu²⁺ exhibits relatively slow decay (∼1 μs) and intense re-absorption of luminescence from green/yellow emitters, thereby causing optical saturation and reducing the luminous efficacy. Here, we fabricated a novel phosphor converter comprising Lu₃Al₅O₁₂:Ce³⁺ and Y_1.3Gd_1.6Al₅O₁₂:Ce³⁺ powders. The typical sample, when excited by a blue laser, exhibited a high luminous efficacy of 231 lm/W and a high saturation threshold of 22.2 W/mm², resulting in a high luminous exitance of 695 lm/mm². Importantly, the phosphor converter produced a broad emission band that included sufficient cyan and red components, resulting in a full width at half maximum (FWHM) of 134 nm and a high CRI of 81. With this excellent balance between CRI and luminous efficacy, the reported phosphor converter can significantly expand the range of laser lighting applications.

Original language	English
Journal	Ceramics International
Volume	49
Issue number	24, Part A
Pages (from-to)	40846-40852
ISSN	0272-8842
DOIs	https://doi.org/10.1016/j.ceramint.2023.10.070
Publication status	Published - 2023

Bibliographical note

Funding Information:
This work was supported by the National Key Research and Development Program of China ( 2021YFB3501700 ), the National Natural Science Foundation of China ( 51772076 , 51802083 , 52002120 ), the Science Foundation of Henan Province ( 222300420448 ), the research fund of Henan Key Laboratory of Materials on Deep-Earth Engineering ( MDE2020-02 , Henan Polytechnic University). BD also acknowledges the financial support from Marie Curie International Incoming Fellowship of the European Community Human Potential Program under Contract no. PIIFR-GA-2013-913847 (Return Phase).

Publisher Copyright:
© 2023 Elsevier Ltd and Techna Group S.r.l.

Keywords

Color rendering index
Luminous efficacy
Saturation threshold
Spectral width

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@article{c5d0c686ac044b0abced441808674e46,

title = "Ce3+-based phosphor converter enabling laser lighting to attain both high CRI and high luminous efficacy",

abstract = "Eu2+ doped-CaAlSiN3 possesses broad red emission, enabling a phosphor-converted lighting device to achieve a high color rendering index (CRI) and proper color temperature. However, CaAlSiN3:Eu2+ exhibits relatively slow decay (∼1 μs) and intense re-absorption of luminescence from green/yellow emitters, thereby causing optical saturation and reducing the luminous efficacy. Here, we fabricated a novel phosphor converter comprising Lu3Al5O12:Ce3+ and Y1.3Gd1.6Al5O12:Ce3+ powders. The typical sample, when excited by a blue laser, exhibited a high luminous efficacy of 231 lm/W and a high saturation threshold of 22.2 W/mm2, resulting in a high luminous exitance of 695 lm/mm2. Importantly, the phosphor converter produced a broad emission band that included sufficient cyan and red components, resulting in a full width at half maximum (FWHM) of 134 nm and a high CRI of 81. With this excellent balance between CRI and luminous efficacy, the reported phosphor converter can significantly expand the range of laser lighting applications.",

keywords = "Color rendering index, Luminous efficacy, Saturation threshold, Spectral width",

author = "Xinrong Chen and Shaoda Yuan and Yanghan Guo and Bingguo Liu and Shiqing Pang and Le Zhang and Baoli Du and Carsten Dam-Hansen and Jian Xu and Jensen, {Ole B.}",

note = "Funding Information: This work was supported by the National Key Research and Development Program of China ( 2021YFB3501700 ), the National Natural Science Foundation of China ( 51772076 , 51802083 , 52002120 ), the Science Foundation of Henan Province ( 222300420448 ), the research fund of Henan Key Laboratory of Materials on Deep-Earth Engineering ( MDE2020-02 , Henan Polytechnic University). BD also acknowledges the financial support from Marie Curie International Incoming Fellowship of the European Community Human Potential Program under Contract no. PIIFR-GA-2013-913847 (Return Phase). Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd and Techna Group S.r.l.",

year = "2023",

doi = "10.1016/j.ceramint.2023.10.070",

language = "English",

volume = "49",

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issn = "0272-8842",

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TY - JOUR

T1 - Ce3+-based phosphor converter enabling laser lighting to attain both high CRI and high luminous efficacy

AU - Chen, Xinrong

AU - Yuan, Shaoda

AU - Guo, Yanghan

AU - Liu, Bingguo

AU - Pang, Shiqing

AU - Zhang, Le

AU - Du, Baoli

AU - Dam-Hansen, Carsten

AU - Xu, Jian

AU - Jensen, Ole B.

N1 - Funding Information: This work was supported by the National Key Research and Development Program of China ( 2021YFB3501700 ), the National Natural Science Foundation of China ( 51772076 , 51802083 , 52002120 ), the Science Foundation of Henan Province ( 222300420448 ), the research fund of Henan Key Laboratory of Materials on Deep-Earth Engineering ( MDE2020-02 , Henan Polytechnic University). BD also acknowledges the financial support from Marie Curie International Incoming Fellowship of the European Community Human Potential Program under Contract no. PIIFR-GA-2013-913847 (Return Phase). Publisher Copyright: © 2023 Elsevier Ltd and Techna Group S.r.l.

PY - 2023

Y1 - 2023

N2 - Eu2+ doped-CaAlSiN3 possesses broad red emission, enabling a phosphor-converted lighting device to achieve a high color rendering index (CRI) and proper color temperature. However, CaAlSiN3:Eu2+ exhibits relatively slow decay (∼1 μs) and intense re-absorption of luminescence from green/yellow emitters, thereby causing optical saturation and reducing the luminous efficacy. Here, we fabricated a novel phosphor converter comprising Lu3Al5O12:Ce3+ and Y1.3Gd1.6Al5O12:Ce3+ powders. The typical sample, when excited by a blue laser, exhibited a high luminous efficacy of 231 lm/W and a high saturation threshold of 22.2 W/mm2, resulting in a high luminous exitance of 695 lm/mm2. Importantly, the phosphor converter produced a broad emission band that included sufficient cyan and red components, resulting in a full width at half maximum (FWHM) of 134 nm and a high CRI of 81. With this excellent balance between CRI and luminous efficacy, the reported phosphor converter can significantly expand the range of laser lighting applications.

AB - Eu2+ doped-CaAlSiN3 possesses broad red emission, enabling a phosphor-converted lighting device to achieve a high color rendering index (CRI) and proper color temperature. However, CaAlSiN3:Eu2+ exhibits relatively slow decay (∼1 μs) and intense re-absorption of luminescence from green/yellow emitters, thereby causing optical saturation and reducing the luminous efficacy. Here, we fabricated a novel phosphor converter comprising Lu3Al5O12:Ce3+ and Y1.3Gd1.6Al5O12:Ce3+ powders. The typical sample, when excited by a blue laser, exhibited a high luminous efficacy of 231 lm/W and a high saturation threshold of 22.2 W/mm2, resulting in a high luminous exitance of 695 lm/mm2. Importantly, the phosphor converter produced a broad emission band that included sufficient cyan and red components, resulting in a full width at half maximum (FWHM) of 134 nm and a high CRI of 81. With this excellent balance between CRI and luminous efficacy, the reported phosphor converter can significantly expand the range of laser lighting applications.

KW - Color rendering index

KW - Luminous efficacy

KW - Saturation threshold

KW - Spectral width

U2 - 10.1016/j.ceramint.2023.10.070

DO - 10.1016/j.ceramint.2023.10.070

M3 - Journal article

AN - SCOPUS:85173797432

SN - 0272-8842

VL - 49

SP - 40846

EP - 40852

JO - Ceramics International

JF - Ceramics International

IS - 24, Part A

ER -