Ultra-narrow band blue emission of Eu2+ in halogenated (Alumino)borate systems based on high lattice symmetry

Yi Wei; Xingyu Qu; Guogang Li; Ziyong Cheng; Maxim S. Molokeev; Chun Che Lin; Ting shan Chan; Chung Kai Chang; Yu Chun Chuang; Jun Lin

doi:10.1111/jace.16127

Ultra-narrow band blue emission of Eu²⁺ in halogenated (Alumino)borate systems based on high lattice symmetry

Yi Wei, Xingyu Qu, Guogang Li, Ziyong Cheng, Maxim S. Molokeev, Chun Che Lin, Ting shan Chan, Chung Kai Chang, Yu Chun Chuang, Jun Lin

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

13 Citations (Scopus)

Abstract

Phosphor materials with ultra-high color purity are highly desired in backlit display and WLEDs. How to achieve high-purity three-primary emission in rare earth ions activated inorganic phosphors has become a hot topic. Herein, we reported ultra-narrow band and highly efficient blue-violet-emitting Eu²⁺-doped Ba₂B₅O₉X (fwhm = 31 nm) and NaBa₄(AlB₄O₉)₂X₃ (X = Cl, Br) (fwhm = 43 nm) phosphors with peak positions around 424-437 nm. Especially, the color purity of Ba₂B₅O₉Cl:Eu sample even exceeded 97%, its internal quantum efficiency could achieve 87%. The EXANES analysis revealed that the Eu mainly existed in the form of +2. According to the Rietveld structural refinement, extraordinarily narrow band emission should be attributed to the highly symmetric lattice structures with the flower-like polyhedrons in the studied (alumino)borate matrix. Significantly, the color gamut of as-prepared blue phosphor combined with the standard green and red phosphors was almost close to that of Rec. 2020 display standard. In addition, cation substitution strategy in NaBa₄(Al_xB_5- _xO₉)₂Cl₃ (x = 0-4) and NaBa₄(Ga_yB_5- _yO₉)₂Cl₃ (y = 0-3) samples successfully achieved spectra adjustment, and the underlying mechanism was proposed. All these results demonstrate that the as-prepared phosphors could be superior blue-emitting candidates for backlit display as well as WLEDs.

Original language	English
Pages (from-to)	2353-2369
Number of pages	17
Journal	Journal of the American Ceramic Society
Volume	102
Issue number	5
DOIs	https://doi.org/10.1111/jace.16127
Publication status	Published - Jan 1 2019
Externally published	Yes

Keywords

blue emission
high symmetry
phosphors
ultra-narrow band
WLEDs

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1111/jace.16127

Cite this

@article{2b41730bf1ce49d0a5f8f3025e1e3077,

title = "Ultra-narrow band blue emission of Eu2+ in halogenated (Alumino)borate systems based on high lattice symmetry",

abstract = "Phosphor materials with ultra-high color purity are highly desired in backlit display and WLEDs. How to achieve high-purity three-primary emission in rare earth ions activated inorganic phosphors has become a hot topic. Herein, we reported ultra-narrow band and highly efficient blue-violet-emitting Eu2+-doped Ba2B5O9X (fwhm = 31 nm) and NaBa4(AlB4O9)2X3 (X = Cl, Br) (fwhm = 43 nm) phosphors with peak positions around 424-437 nm. Especially, the color purity of Ba2B5O9Cl:Eu sample even exceeded 97%, its internal quantum efficiency could achieve 87%. The EXANES analysis revealed that the Eu mainly existed in the form of +2. According to the Rietveld structural refinement, extraordinarily narrow band emission should be attributed to the highly symmetric lattice structures with the flower-like polyhedrons in the studied (alumino)borate matrix. Significantly, the color gamut of as-prepared blue phosphor combined with the standard green and red phosphors was almost close to that of Rec. 2020 display standard. In addition, cation substitution strategy in NaBa4(AlxB5- xO9)2Cl3 (x = 0-4) and NaBa4(GayB5- yO9)2Cl3 (y = 0-3) samples successfully achieved spectra adjustment, and the underlying mechanism was proposed. All these results demonstrate that the as-prepared phosphors could be superior blue-emitting candidates for backlit display as well as WLEDs.",

keywords = "blue emission, high symmetry, phosphors, ultra-narrow band, WLEDs",

author = "Yi Wei and Xingyu Qu and Guogang Li and Ziyong Cheng and Molokeev, {Maxim S.} and Lin, {Chun Che} and Chan, {Ting shan} and Chang, {Chung Kai} and Chuang, {Yu Chun} and Jun Lin",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China (Grant Nos. 51672259, 51672265, 21521092, 51750110511), Engineering Research Center of Nano‐Geomaterials of Ministry of Education, China University of Geosciences (Wuhan) (No. NGM2016-KF002), the Ministry of Science and Technology of Taiwan (Contract No. MOST 104‐2113‐M‐027‐007‐MY3), the Key Research Program of Frontier Sciences, CAS (Grant No. YZDY‐SSW‐JSC018), and projects for science and technology development plan of Jilin province (20170414003GH), the Program for Jiangmen Innovative Reasearch Team (No.[2017]385),major program of basic research and applied research of Guangdong Province (2017KZDXM083) and the Russian Science Foundation (Grant No. 17‐12‐01047). Funding Information: Engineering Research Center of Nano- Geomaterials of Ministry of Education, China University of Geosciences, Wuhan, Grant/Award Number: NGM2016KF002; Ministry of Science and Technology of Taiwan, Grant/Award Number: MOST 104-2113-M-027-007-MY3; Key Research Program of Frontier Sciences, CAS, Grant/ Award Number: YZDY-SSW-JSC018; Russian Science Foundation, Grant/Award Number: 17-12-01047; National Natural Funding Information: Science Foundation of China, Grant/ Award Number: 51672259, 51672265, 21521092, 51750110511 Publisher Copyright: {\textcopyright} 2018 The American Ceramic Society",

year = "2019",

month = jan,

day = "1",

doi = "10.1111/jace.16127",

language = "English",

volume = "102",

pages = "2353--2369",

journal = "Journal of the American Ceramic Society",

issn = "0002-7820",

publisher = "Wiley-Blackwell",

number = "5",

}

TY - JOUR

T1 - Ultra-narrow band blue emission of Eu2+ in halogenated (Alumino)borate systems based on high lattice symmetry

AU - Wei, Yi

AU - Qu, Xingyu

AU - Li, Guogang

AU - Cheng, Ziyong

AU - Molokeev, Maxim S.

AU - Lin, Chun Che

AU - Chan, Ting shan

AU - Chang, Chung Kai

AU - Chuang, Yu Chun

AU - Lin, Jun

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (Grant Nos. 51672259, 51672265, 21521092, 51750110511), Engineering Research Center of Nano‐Geomaterials of Ministry of Education, China University of Geosciences (Wuhan) (No. NGM2016-KF002), the Ministry of Science and Technology of Taiwan (Contract No. MOST 104‐2113‐M‐027‐007‐MY3), the Key Research Program of Frontier Sciences, CAS (Grant No. YZDY‐SSW‐JSC018), and projects for science and technology development plan of Jilin province (20170414003GH), the Program for Jiangmen Innovative Reasearch Team (No.[2017]385),major program of basic research and applied research of Guangdong Province (2017KZDXM083) and the Russian Science Foundation (Grant No. 17‐12‐01047). Funding Information: Engineering Research Center of Nano- Geomaterials of Ministry of Education, China University of Geosciences, Wuhan, Grant/Award Number: NGM2016KF002; Ministry of Science and Technology of Taiwan, Grant/Award Number: MOST 104-2113-M-027-007-MY3; Key Research Program of Frontier Sciences, CAS, Grant/ Award Number: YZDY-SSW-JSC018; Russian Science Foundation, Grant/Award Number: 17-12-01047; National Natural Funding Information: Science Foundation of China, Grant/ Award Number: 51672259, 51672265, 21521092, 51750110511 Publisher Copyright: © 2018 The American Ceramic Society

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Phosphor materials with ultra-high color purity are highly desired in backlit display and WLEDs. How to achieve high-purity three-primary emission in rare earth ions activated inorganic phosphors has become a hot topic. Herein, we reported ultra-narrow band and highly efficient blue-violet-emitting Eu2+-doped Ba2B5O9X (fwhm = 31 nm) and NaBa4(AlB4O9)2X3 (X = Cl, Br) (fwhm = 43 nm) phosphors with peak positions around 424-437 nm. Especially, the color purity of Ba2B5O9Cl:Eu sample even exceeded 97%, its internal quantum efficiency could achieve 87%. The EXANES analysis revealed that the Eu mainly existed in the form of +2. According to the Rietveld structural refinement, extraordinarily narrow band emission should be attributed to the highly symmetric lattice structures with the flower-like polyhedrons in the studied (alumino)borate matrix. Significantly, the color gamut of as-prepared blue phosphor combined with the standard green and red phosphors was almost close to that of Rec. 2020 display standard. In addition, cation substitution strategy in NaBa4(AlxB5- xO9)2Cl3 (x = 0-4) and NaBa4(GayB5- yO9)2Cl3 (y = 0-3) samples successfully achieved spectra adjustment, and the underlying mechanism was proposed. All these results demonstrate that the as-prepared phosphors could be superior blue-emitting candidates for backlit display as well as WLEDs.

AB - Phosphor materials with ultra-high color purity are highly desired in backlit display and WLEDs. How to achieve high-purity three-primary emission in rare earth ions activated inorganic phosphors has become a hot topic. Herein, we reported ultra-narrow band and highly efficient blue-violet-emitting Eu2+-doped Ba2B5O9X (fwhm = 31 nm) and NaBa4(AlB4O9)2X3 (X = Cl, Br) (fwhm = 43 nm) phosphors with peak positions around 424-437 nm. Especially, the color purity of Ba2B5O9Cl:Eu sample even exceeded 97%, its internal quantum efficiency could achieve 87%. The EXANES analysis revealed that the Eu mainly existed in the form of +2. According to the Rietveld structural refinement, extraordinarily narrow band emission should be attributed to the highly symmetric lattice structures with the flower-like polyhedrons in the studied (alumino)borate matrix. Significantly, the color gamut of as-prepared blue phosphor combined with the standard green and red phosphors was almost close to that of Rec. 2020 display standard. In addition, cation substitution strategy in NaBa4(AlxB5- xO9)2Cl3 (x = 0-4) and NaBa4(GayB5- yO9)2Cl3 (y = 0-3) samples successfully achieved spectra adjustment, and the underlying mechanism was proposed. All these results demonstrate that the as-prepared phosphors could be superior blue-emitting candidates for backlit display as well as WLEDs.

KW - blue emission

KW - high symmetry

KW - phosphors

KW - ultra-narrow band

KW - WLEDs

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