Powder synthesis and luminescence properties of green emitting Ba2LiSi7-xAlxN12-xOx:Eu2+ phosphor

Takashi Takeda; Kousuke Kato; Hajime Kiyono; Naoto Hirosaki

doi:10.1016/j.jallcom.2020.156358

Powder synthesis and luminescence properties of green emitting Ba₂LiSi_7-xAl_xN_12-xO_x:Eu²⁺ phosphor

Takashi Takeda, Kousuke Kato, Hajime Kiyono, Naoto Hirosaki

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

6 Citations (Scopus)

Abstract

Single phase powders of green emitting Ba₂LiSi_7-xAl_xN_12-xO_x:Eu²⁺ phosphor were prepared by controlling the starting compositions, annealing conditions and reaction vessels. The emission peak of Ba₂LiSi_7-xAl_xN_12-xO_x:Eu²⁺ phosphor shifted from 502 nm to 515 nm depending on the Eu concentration. The intensity was highest with an Eu concentration of 3 at%. The phosphor showed a small thermal quenching of luminescence intensity and the integrated intensities at 200 °C and 300 °C were 100% and 96%, respectively, of the intensity observed at room temperature. The phosphor washed by hydrochloric acid solution showed a high internal quantum efficiency (QE) value of 93% with 400 nm excitation.

Original language	English
Article number	156358
Journal	Journal of Alloys and Compounds
Volume	850
DOIs	https://doi.org/10.1016/j.jallcom.2020.156358
Publication status	Published - 2021 Jan 5

Keywords

Luminescence
Nitride materials
Phosphors
Scanning electron microscopy
Solid state reaction
X-ray diffraction

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2020.156358

Cite this

@article{6c57724f65fc4a0bbcf5c6b74669707a,

title = "Powder synthesis and luminescence properties of green emitting Ba2LiSi7-xAlxN12-xOx:Eu2+ phosphor",

abstract = "Single phase powders of green emitting Ba2LiSi7-xAlxN12-xOx:Eu2+ phosphor were prepared by controlling the starting compositions, annealing conditions and reaction vessels. The emission peak of Ba2LiSi7-xAlxN12-xOx:Eu2+ phosphor shifted from 502 nm to 515 nm depending on the Eu concentration. The intensity was highest with an Eu concentration of 3 at%. The phosphor showed a small thermal quenching of luminescence intensity and the integrated intensities at 200 °C and 300 °C were 100% and 96%, respectively, of the intensity observed at room temperature. The phosphor washed by hydrochloric acid solution showed a high internal quantum efficiency (QE) value of 93% with 400 nm excitation.",

keywords = "Luminescence, Nitride materials, Phosphors, Scanning electron microscopy, Solid state reaction, X-ray diffraction",

author = "Takashi Takeda and Kousuke Kato and Hajime Kiyono and Naoto Hirosaki",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2021",

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doi = "10.1016/j.jallcom.2020.156358",

language = "English",

volume = "850",

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TY - JOUR

T1 - Powder synthesis and luminescence properties of green emitting Ba2LiSi7-xAlxN12-xOx:Eu2+ phosphor

AU - Takeda, Takashi

AU - Kato, Kousuke

AU - Kiyono, Hajime

AU - Hirosaki, Naoto

PY - 2021/1/5

Y1 - 2021/1/5

N2 - Single phase powders of green emitting Ba2LiSi7-xAlxN12-xOx:Eu2+ phosphor were prepared by controlling the starting compositions, annealing conditions and reaction vessels. The emission peak of Ba2LiSi7-xAlxN12-xOx:Eu2+ phosphor shifted from 502 nm to 515 nm depending on the Eu concentration. The intensity was highest with an Eu concentration of 3 at%. The phosphor showed a small thermal quenching of luminescence intensity and the integrated intensities at 200 °C and 300 °C were 100% and 96%, respectively, of the intensity observed at room temperature. The phosphor washed by hydrochloric acid solution showed a high internal quantum efficiency (QE) value of 93% with 400 nm excitation.

AB - Single phase powders of green emitting Ba2LiSi7-xAlxN12-xOx:Eu2+ phosphor were prepared by controlling the starting compositions, annealing conditions and reaction vessels. The emission peak of Ba2LiSi7-xAlxN12-xOx:Eu2+ phosphor shifted from 502 nm to 515 nm depending on the Eu concentration. The intensity was highest with an Eu concentration of 3 at%. The phosphor showed a small thermal quenching of luminescence intensity and the integrated intensities at 200 °C and 300 °C were 100% and 96%, respectively, of the intensity observed at room temperature. The phosphor washed by hydrochloric acid solution showed a high internal quantum efficiency (QE) value of 93% with 400 nm excitation.

KW - Luminescence

KW - Nitride materials

KW - Phosphors

KW - Scanning electron microscopy

KW - Solid state reaction

KW - X-ray diffraction

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