Emerging near-unity internal quantum efficiency and color purity from red-emitting phosphors for warm white LED with enhanced color rendition

Liangling Sun; Yuanyuan Liu; Bin Wang; Shengchun Yang

doi:10.1016/j.jallcom.2021.163209

Emerging near-unity internal quantum efficiency and color purity from red-emitting phosphors for warm white LED with enhanced color rendition

Liangling Sun
, Yuanyuan Liu
, Bin Wang
, Shengchun Yang

School of Physics

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

A robust and bright red emitter is recognized as a key enabler for high-quality warm white light-emitting diode (w-LED). Herein, triple molybdate scheelite-type NaCaLa_1-x(MoO₄)₃:xEu³⁺ (NCLM:xEu³⁺) phosphors derived from NaCaLa(MoO₄)₃ host by the equivalent-valent substitution strategy are successfully synthesized and systematically studied. Impressively, the NCLM:Eu³⁺ phosphors (λ_em = 615 nm) can be effectively stimulated by 395 and 466 nm light, exhibiting an ultra-high color purity and quantum efficiency close to 100%. The structure-related emission characteristics were analyzed based on the Judd-Oflet theory. The packaged white LED device used tri-color phosphors displays a superior color rendering index of 86.0 and low correlated color temperature of 2797 K. Moreover, the NCLM-based polydimethylsiloxane film maintains an impressive luminescent performance when it is folded or bent, demonstrating the potential applications in the field of flexible display and other light-emitting devices.

Original language	English
Article number	163209
Journal	Journal of Alloys and Compounds
Volume	899
DOIs	https://doi.org/10.1016/j.jallcom.2021.163209
State	Published - 5 Apr 2022

Keywords

Energy transfer
Flexible application
Phosphors
Plant lighting
light-emitting diode

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10.1016/j.jallcom.2021.163209

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title = "Emerging near-unity internal quantum efficiency and color purity from red-emitting phosphors for warm white LED with enhanced color rendition",

abstract = "A robust and bright red emitter is recognized as a key enabler for high-quality warm white light-emitting diode (w-LED). Herein, triple molybdate scheelite-type NaCaLa1-x(MoO4)3:xEu3+ (NCLM:xEu3+) phosphors derived from NaCaLa(MoO4)3 host by the equivalent-valent substitution strategy are successfully synthesized and systematically studied. Impressively, the NCLM:Eu3+ phosphors (λem = 615 nm) can be effectively stimulated by 395 and 466 nm light, exhibiting an ultra-high color purity and quantum efficiency close to 100\%. The structure-related emission characteristics were analyzed based on the Judd-Oflet theory. The packaged white LED device used tri-color phosphors displays a superior color rendering index of 86.0 and low correlated color temperature of 2797 K. Moreover, the NCLM-based polydimethylsiloxane film maintains an impressive luminescent performance when it is folded or bent, demonstrating the potential applications in the field of flexible display and other light-emitting devices.",

keywords = "Energy transfer, Flexible application, Phosphors, Plant lighting, light-emitting diode",

author = "Liangling Sun and Yuanyuan Liu and Bin Wang and Shengchun Yang",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2022",

month = apr,

day = "5",

doi = "10.1016/j.jallcom.2021.163209",

language = "英语",

volume = "899",

journal = "Journal of Alloys and Compounds",

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T1 - Emerging near-unity internal quantum efficiency and color purity from red-emitting phosphors for warm white LED with enhanced color rendition

AU - Sun, Liangling

AU - Liu, Yuanyuan

AU - Wang, Bin

AU - Yang, Shengchun

PY - 2022/4/5

Y1 - 2022/4/5

N2 - A robust and bright red emitter is recognized as a key enabler for high-quality warm white light-emitting diode (w-LED). Herein, triple molybdate scheelite-type NaCaLa1-x(MoO4)3:xEu3+ (NCLM:xEu3+) phosphors derived from NaCaLa(MoO4)3 host by the equivalent-valent substitution strategy are successfully synthesized and systematically studied. Impressively, the NCLM:Eu3+ phosphors (λem = 615 nm) can be effectively stimulated by 395 and 466 nm light, exhibiting an ultra-high color purity and quantum efficiency close to 100%. The structure-related emission characteristics were analyzed based on the Judd-Oflet theory. The packaged white LED device used tri-color phosphors displays a superior color rendering index of 86.0 and low correlated color temperature of 2797 K. Moreover, the NCLM-based polydimethylsiloxane film maintains an impressive luminescent performance when it is folded or bent, demonstrating the potential applications in the field of flexible display and other light-emitting devices.

AB - A robust and bright red emitter is recognized as a key enabler for high-quality warm white light-emitting diode (w-LED). Herein, triple molybdate scheelite-type NaCaLa1-x(MoO4)3:xEu3+ (NCLM:xEu3+) phosphors derived from NaCaLa(MoO4)3 host by the equivalent-valent substitution strategy are successfully synthesized and systematically studied. Impressively, the NCLM:Eu3+ phosphors (λem = 615 nm) can be effectively stimulated by 395 and 466 nm light, exhibiting an ultra-high color purity and quantum efficiency close to 100%. The structure-related emission characteristics were analyzed based on the Judd-Oflet theory. The packaged white LED device used tri-color phosphors displays a superior color rendering index of 86.0 and low correlated color temperature of 2797 K. Moreover, the NCLM-based polydimethylsiloxane film maintains an impressive luminescent performance when it is folded or bent, demonstrating the potential applications in the field of flexible display and other light-emitting devices.

KW - Energy transfer

KW - Flexible application

KW - Phosphors

KW - Plant lighting

KW - light-emitting diode

UR - https://www.scopus.com/pages/publications/85122469627

U2 - 10.1016/j.jallcom.2021.163209

DO - 10.1016/j.jallcom.2021.163209

M3 - 文章

AN - SCOPUS:85122469627

SN - 0925-8388

VL - 899

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 163209

ER -

Emerging near-unity internal quantum efficiency and color purity from red-emitting phosphors for warm white LED with enhanced color rendition

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Keywords

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