Site-Selective Occupancy of Eu2+ Toward Blue-Light-Excited Red Emission in a Rb3YSi2O7:Eu Phosphor

Jianwei Qiao; Lixin Ning; Maxim S. Molokeev; Yu Chun Chuang; Qinyuan Zhang; Kenneth R. Poeppelmeier; Zhiguo Xia

doi:10.1002/anie.201905787

Site-Selective Occupancy of Eu²⁺ Toward Blue-Light-Excited Red Emission in a Rb₃YSi₂O₇:Eu Phosphor

Jianwei Qiao, Lixin Ning^*, Maxim S. Molokeev, Yu Chun Chuang, Qinyuan Zhang, Kenneth R. Poeppelmeier, Zhiguo Xia

^*Corresponding author for this work

Chemistry

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

172 Scopus citations

Abstract

Establishing an effective design principle in solid-state materials for a blue-light-excited Eu²⁺-doped red-emitting oxide-based phosphors remains one of the significant challenges for white light-emitting diodes (WLEDs). Selective occupation of Eu²⁺ in inorganic polyhedra with small coordination numbers results in broad-band red emission as a result of enhanced crystal-field splitting of 5d levels. Rb₃YSi₂O₇:Eu exhibits a broad emission band at λ_max=622 nm under 450 nm excitation, and structural analysis and DFT calculations support the concept that Eu²⁺ ions preferably occupy RbO₆ and YO₆ polyhedra and show the characteristic red emission band of Eu²⁺. The excellent thermal quenching resistance, high color-rendering index R_a (93), and low CCT (4013 K) of the WLEDs clearly demonstrate that site engineering of rare-earth phosphors is an effective strategy to target tailored optical performance.

Original language	English (US)
Pages (from-to)	11521-11526
Number of pages	6
Journal	Angewandte Chemie - International Edition
Volume	58
Issue number	33
DOIs	https://doi.org/10.1002/anie.201905787
State	Published - Aug 12 2019

Funding

This work is supported by the National Natural Science Foundation of China (51722202, 51572023, and 11574003), Natural Science Foundations of Beijing (2172036), Fundamental Research Funds for the Central Universities (FRF-TP-18-002C1), and the Guangdong Provincial Science & Technology Project (2018A050506004). K.R.P. recognizes that this work was made possible by support from the National Science Foundation, Solid State Materials Chemistry award DMR-1608218.

Keywords

light-emitting diodes
red-emitting phosphors
silicates
site occupancy

ASJC Scopus subject areas

General Chemistry
Catalysis

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10.1002/anie.201905787

Cite this

@article{9ec3f837663d43afb30d9615b38b1625,

title = "Site-Selective Occupancy of Eu2+ Toward Blue-Light-Excited Red Emission in a Rb3YSi2O7:Eu Phosphor",

abstract = "Establishing an effective design principle in solid-state materials for a blue-light-excited Eu2+-doped red-emitting oxide-based phosphors remains one of the significant challenges for white light-emitting diodes (WLEDs). Selective occupation of Eu2+ in inorganic polyhedra with small coordination numbers results in broad-band red emission as a result of enhanced crystal-field splitting of 5d levels. Rb3YSi2O7:Eu exhibits a broad emission band at λmax=622 nm under 450 nm excitation, and structural analysis and DFT calculations support the concept that Eu2+ ions preferably occupy RbO6 and YO6 polyhedra and show the characteristic red emission band of Eu2+. The excellent thermal quenching resistance, high color-rendering index Ra (93), and low CCT (4013 K) of the WLEDs clearly demonstrate that site engineering of rare-earth phosphors is an effective strategy to target tailored optical performance.",

keywords = "light-emitting diodes, red-emitting phosphors, silicates, site occupancy",

author = "Jianwei Qiao and Lixin Ning and Molokeev, {Maxim S.} and Chuang, {Yu Chun} and Qinyuan Zhang and Poeppelmeier, {Kenneth R.} and Zhiguo Xia",

note = "Funding Information: This work is supported by the National Natural Science Foundation of China (51722202, 51572023, and 11574003), Natural Science Foundations of Beijing (2172036), Fundamental Research Funds for the Central Universities (FRF-TP-18-002C1), and the Guangdong Provincial Science & Technology Project (2018A050506004). K.R.P. recognizes that this work was made possible by support from the National Science Foundation, Solid State Materials Chemistry award DMR-1608218. Publisher Copyright: {\textcopyright} 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2019",

month = aug,

day = "12",

doi = "10.1002/anie.201905787",

language = "English (US)",

volume = "58",

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journal = "Angewandte Chemie - International Edition",

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publisher = "John Wiley and Sons Ltd",

number = "33",

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T1 - Site-Selective Occupancy of Eu2+ Toward Blue-Light-Excited Red Emission in a Rb3YSi2O7:Eu Phosphor

AU - Qiao, Jianwei

AU - Ning, Lixin

AU - Molokeev, Maxim S.

AU - Chuang, Yu Chun

AU - Zhang, Qinyuan

AU - Poeppelmeier, Kenneth R.

AU - Xia, Zhiguo

N1 - Funding Information: This work is supported by the National Natural Science Foundation of China (51722202, 51572023, and 11574003), Natural Science Foundations of Beijing (2172036), Fundamental Research Funds for the Central Universities (FRF-TP-18-002C1), and the Guangdong Provincial Science & Technology Project (2018A050506004). K.R.P. recognizes that this work was made possible by support from the National Science Foundation, Solid State Materials Chemistry award DMR-1608218. Publisher Copyright: © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

PY - 2019/8/12

Y1 - 2019/8/12

N2 - Establishing an effective design principle in solid-state materials for a blue-light-excited Eu2+-doped red-emitting oxide-based phosphors remains one of the significant challenges for white light-emitting diodes (WLEDs). Selective occupation of Eu2+ in inorganic polyhedra with small coordination numbers results in broad-band red emission as a result of enhanced crystal-field splitting of 5d levels. Rb3YSi2O7:Eu exhibits a broad emission band at λmax=622 nm under 450 nm excitation, and structural analysis and DFT calculations support the concept that Eu2+ ions preferably occupy RbO6 and YO6 polyhedra and show the characteristic red emission band of Eu2+. The excellent thermal quenching resistance, high color-rendering index Ra (93), and low CCT (4013 K) of the WLEDs clearly demonstrate that site engineering of rare-earth phosphors is an effective strategy to target tailored optical performance.

AB - Establishing an effective design principle in solid-state materials for a blue-light-excited Eu2+-doped red-emitting oxide-based phosphors remains one of the significant challenges for white light-emitting diodes (WLEDs). Selective occupation of Eu2+ in inorganic polyhedra with small coordination numbers results in broad-band red emission as a result of enhanced crystal-field splitting of 5d levels. Rb3YSi2O7:Eu exhibits a broad emission band at λmax=622 nm under 450 nm excitation, and structural analysis and DFT calculations support the concept that Eu2+ ions preferably occupy RbO6 and YO6 polyhedra and show the characteristic red emission band of Eu2+. The excellent thermal quenching resistance, high color-rendering index Ra (93), and low CCT (4013 K) of the WLEDs clearly demonstrate that site engineering of rare-earth phosphors is an effective strategy to target tailored optical performance.

KW - light-emitting diodes

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KW - silicates

KW - site occupancy

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Site-Selective Occupancy of Eu²⁺ Toward Blue-Light-Excited Red Emission in a Rb₃YSi₂O₇:Eu Phosphor

Abstract

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Keywords

ASJC Scopus subject areas

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CSD 1909273: Experimental Crystal Structure Determination

Cite this

Site-Selective Occupancy of Eu2+ Toward Blue-Light-Excited Red Emission in a Rb3YSi2O7:Eu Phosphor

Abstract

Funding

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Datasets

CSD 1909273: Experimental Crystal Structure Determination

Cite this

Site-Selective Occupancy of Eu²⁺ Toward Blue-Light-Excited Red Emission in a Rb₃YSi₂O₇:Eu Phosphor