Enhanced emission from thermally stable Eu3+ doped CaB2Si2O8 red phosphors via alkali metal modification for W-LEDs application

Xueyun Liu; Bingqing Shen; Baojiu Chen; Yuanpeng Zhang; Jianxu Hu

doi:10.1016/j.optmat.2019.109353

Enhanced emission from thermally stable Eu³⁺ doped CaB₂Si₂O₈ red phosphors via alkali metal modification for W-LEDs application

Xueyun Liu, Bingqing Shen, Baojiu Chen, Yuanpeng Zhang, Jianxu Hu

Powder Diffraction

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

15 Scopus citations

Abstract

M⁺/Eu³⁺ (M = Li, Na, K) co-doped CaB₂Si₂O₈ phosphors have been synthesized by a solid-state reaction approach. XRD measurements confirm that the phase purity of the CaB₂Si₂O₈ host is maintained after the introduction of alkali metal ions and Eu³⁺ ions. The emission intensity of Eu³⁺ ions is enhanced by a factor of 1.75 and 1.55 with the incorporation of Li⁺ and Na⁺ ions, respectively, originating from the charge compensation and improved asymmetry in the crystal field, while the addition of K⁺ ions to the composition results in a decreased luminescence intensity due to the structural-defect-related quenching. Temperature dependent measurement reveals that the prepared phosphor exhibits excellent thermal stability with 81% at 423 K of the integrated emission intensity at 298 K. A white light-emitting diode (W-LED) device is fabricated based on the synthesized Eu³⁺ doped CaB₂Si₂O₈ red phosphor modified by Li ions. All these results indicate that the synthesized phosphor is a promising red-emitting material for W-LEDs application.

Original language	English
Article number	109353
Journal	Optical Materials
Volume	96
DOIs	https://doi.org/10.1016/j.optmat.2019.109353
State	Published - Oct 2019

Funding

This work is financially supported by the National Natural Science Foundation of China (Grant Nos. 51702172 ), Open Fund of the State Key Laboratory of Luminescent Materials and Devices ( South China University of Technology , Grant Nos. 2018-skllmd-11 ), Natural Science Foundation of Ningbo (Grant Nos. 2018A610042 ), Science Research Fund Project of Ningbo University (Grant Nos. XYL18015 ), and is sponsored by the K. C. WongMagna Fund in Ningbo University.

Funders	Funder number
Science Research Fund Project of Ningbo University	XYL18015
Natural Science Foundation of Ningbo	2018A610042
National Natural Science Foundation of China	51702172
Ningbo University
South China University of Technology	2018-skllmd-11
State Key Laboratory of Luminescent Materials and Devices

Keywords

Alkali metal ions
Eu ions
Red phosphor
W-LEDs

Access to Document

10.1016/j.optmat.2019.109353

Cite this

@article{f166ccb3818e4385a2fcee33e4cc26f6,

title = "Enhanced emission from thermally stable Eu3+ doped CaB2Si2O8 red phosphors via alkali metal modification for W-LEDs application",

abstract = "M+/Eu3+ (M = Li, Na, K) co-doped CaB2Si2O8 phosphors have been synthesized by a solid-state reaction approach. XRD measurements confirm that the phase purity of the CaB2Si2O8 host is maintained after the introduction of alkali metal ions and Eu3+ ions. The emission intensity of Eu3+ ions is enhanced by a factor of 1.75 and 1.55 with the incorporation of Li+ and Na+ ions, respectively, originating from the charge compensation and improved asymmetry in the crystal field, while the addition of K+ ions to the composition results in a decreased luminescence intensity due to the structural-defect-related quenching. Temperature dependent measurement reveals that the prepared phosphor exhibits excellent thermal stability with 81% at 423 K of the integrated emission intensity at 298 K. A white light-emitting diode (W-LED) device is fabricated based on the synthesized Eu3+ doped CaB2Si2O8 red phosphor modified by Li ions. All these results indicate that the synthesized phosphor is a promising red-emitting material for W-LEDs application.",

keywords = "Alkali metal ions, Eu ions, Red phosphor, W-LEDs",

author = "Xueyun Liu and Bingqing Shen and Baojiu Chen and Yuanpeng Zhang and Jianxu Hu",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

month = oct,

doi = "10.1016/j.optmat.2019.109353",

language = "English",

volume = "96",

journal = "Optical Materials",

issn = "0925-3467",

publisher = "Elsevier",

}

TY - JOUR

T1 - Enhanced emission from thermally stable Eu3+ doped CaB2Si2O8 red phosphors via alkali metal modification for W-LEDs application

AU - Liu, Xueyun

AU - Shen, Bingqing

AU - Chen, Baojiu

AU - Zhang, Yuanpeng

AU - Hu, Jianxu

PY - 2019/10

Y1 - 2019/10

N2 - M+/Eu3+ (M = Li, Na, K) co-doped CaB2Si2O8 phosphors have been synthesized by a solid-state reaction approach. XRD measurements confirm that the phase purity of the CaB2Si2O8 host is maintained after the introduction of alkali metal ions and Eu3+ ions. The emission intensity of Eu3+ ions is enhanced by a factor of 1.75 and 1.55 with the incorporation of Li+ and Na+ ions, respectively, originating from the charge compensation and improved asymmetry in the crystal field, while the addition of K+ ions to the composition results in a decreased luminescence intensity due to the structural-defect-related quenching. Temperature dependent measurement reveals that the prepared phosphor exhibits excellent thermal stability with 81% at 423 K of the integrated emission intensity at 298 K. A white light-emitting diode (W-LED) device is fabricated based on the synthesized Eu3+ doped CaB2Si2O8 red phosphor modified by Li ions. All these results indicate that the synthesized phosphor is a promising red-emitting material for W-LEDs application.

AB - M+/Eu3+ (M = Li, Na, K) co-doped CaB2Si2O8 phosphors have been synthesized by a solid-state reaction approach. XRD measurements confirm that the phase purity of the CaB2Si2O8 host is maintained after the introduction of alkali metal ions and Eu3+ ions. The emission intensity of Eu3+ ions is enhanced by a factor of 1.75 and 1.55 with the incorporation of Li+ and Na+ ions, respectively, originating from the charge compensation and improved asymmetry in the crystal field, while the addition of K+ ions to the composition results in a decreased luminescence intensity due to the structural-defect-related quenching. Temperature dependent measurement reveals that the prepared phosphor exhibits excellent thermal stability with 81% at 423 K of the integrated emission intensity at 298 K. A white light-emitting diode (W-LED) device is fabricated based on the synthesized Eu3+ doped CaB2Si2O8 red phosphor modified by Li ions. All these results indicate that the synthesized phosphor is a promising red-emitting material for W-LEDs application.

KW - Alkali metal ions

KW - Eu ions

KW - Red phosphor

KW - W-LEDs

UR - http://www.scopus.com/inward/record.url?scp=85071660818&partnerID=8YFLogxK

U2 - 10.1016/j.optmat.2019.109353

DO - 10.1016/j.optmat.2019.109353

M3 - Article

AN - SCOPUS:85071660818

SN - 0925-3467

VL - 96

JO - Optical Materials

JF - Optical Materials

M1 - 109353

ER -