Mn-doped LiNaGe<inf>4</inf>O<inf>9</inf> as a rare-earth free phosphor: Impact of Na-substitution on emission in tetragermanate phase

Rie Suzuki; Jun Kunitomo; Yoshihiro Takahashi; Kensaku Nakamura; Minoru Osada; Nobuaki Terakado; Takumi Fujiwara

doi:10.2109/jcersj2.123.888

Mn-doped LiNaGe<inf>4</inf>O<inf>9</inf> as a rare-earth free phosphor: Impact of Na-substitution on emission in tetragermanate phase

Rie Suzuki, Jun Kunitomo, Yoshihiro Takahashi, Kensaku Nakamura, Minoru Osada, Nobuaki Terakado, Takumi Fujiwara

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

9 Citations (Scopus)

Abstract

We have synthesized Mn4+-doped mixed tetragermanate phases in the Li<inf>2</inf>Ge<inf>4</inf>O<inf>9</inf>LiNaGe<inf>4</inf>O<inf>9</inf> system, i.e., Li(Li,Na)Ge<inf>4</inf>O<inf>9</inf>, by a glass-ceramic technique using stoichiometric precursor glasses, and have examined the effect of substitution of Na on their photoluminescence properties. The tetragermanate phases indicated clear red emission based on a 2E→4A<inf>2</inf> transition, and the entire substitution resulting in an LiNaGe<inf>4</inf>O<inf>9</inf> phase provided an improvement of quenching temperature for the emission. Furthermore, the LiNaGe<inf>4</inf>O<inf>9</inf> phase synthesized by solid-state reaction showed a high internal quantum yield and red color purity, demonstrating it to be a possible candidate as a rare-earth-free red phosphor.

Original language	English
Pages (from-to)	888-891
Number of pages	4
Journal	Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume	123
Issue number	1441
DOIs	https://doi.org/10.2109/jcersj2.123.888
Publication status	Published - 2015
Externally published	Yes

Keywords

Germanate
Manganese ion
Phosphor
Rare-earth free
Red emission

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry
Chemistry(all)
Condensed Matter Physics

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Suzuki, R., Kunitomo, J., Takahashi, Y., Nakamura, K., Osada, M., Terakado, N., & Fujiwara, T. (2015). Mn-doped LiNaGe<inf>4</inf>O<inf>9</inf> as a rare-earth free phosphor: Impact of Na-substitution on emission in tetragermanate phase. Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, 123(1441), 888-891. https://doi.org/10.2109/jcersj2.123.888

Mn-doped LiNaGe<inf>4</inf>O<inf>9</inf> as a rare-earth free phosphor : Impact of Na-substitution on emission in tetragermanate phase. / Suzuki, Rie; Kunitomo, Jun; Takahashi, Yoshihiro; Nakamura, Kensaku; Osada, Minoru; Terakado, Nobuaki; Fujiwara, Takumi.

In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 123, No. 1441, 2015, p. 888-891.

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

Suzuki, R, Kunitomo, J, Takahashi, Y, Nakamura, K, Osada, M, Terakado, N & Fujiwara, T 2015, 'Mn-doped LiNaGe<inf>4</inf>O<inf>9</inf> as a rare-earth free phosphor: Impact of Na-substitution on emission in tetragermanate phase', Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, vol. 123, no. 1441, pp. 888-891. https://doi.org/10.2109/jcersj2.123.888

Suzuki, Rie ; Kunitomo, Jun ; Takahashi, Yoshihiro ; Nakamura, Kensaku ; Osada, Minoru ; Terakado, Nobuaki ; Fujiwara, Takumi. / Mn-doped LiNaGe<inf>4</inf>O<inf>9</inf> as a rare-earth free phosphor : Impact of Na-substitution on emission in tetragermanate phase. In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan. 2015 ; Vol. 123, No. 1441. pp. 888-891.

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title = "Mn-doped LiNaGe4O9 as a rare-earth free phosphor: Impact of Na-substitution on emission in tetragermanate phase",

abstract = "We have synthesized Mn4+-doped mixed tetragermanate phases in the Li2Ge4O9LiNaGe4O9 system, i.e., Li(Li,Na)Ge4O9, by a glass-ceramic technique using stoichiometric precursor glasses, and have examined the effect of substitution of Na on their photoluminescence properties. The tetragermanate phases indicated clear red emission based on a 2E→4A2 transition, and the entire substitution resulting in an LiNaGe4O9 phase provided an improvement of quenching temperature for the emission. Furthermore, the LiNaGe4O9 phase synthesized by solid-state reaction showed a high internal quantum yield and red color purity, demonstrating it to be a possible candidate as a rare-earth-free red phosphor.",

keywords = "Germanate, Manganese ion, Phosphor, Rare-earth free, Red emission",

author = "Rie Suzuki and Jun Kunitomo and Yoshihiro Takahashi and Kensaku Nakamura and Minoru Osada and Nobuaki Terakado and Takumi Fujiwara",

year = "2015",

doi = "10.2109/jcersj2.123.888",

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journal = "Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan",

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T1 - Mn-doped LiNaGe4O9 as a rare-earth free phosphor

T2 - Impact of Na-substitution on emission in tetragermanate phase

AU - Suzuki, Rie

AU - Kunitomo, Jun

AU - Takahashi, Yoshihiro

AU - Nakamura, Kensaku

AU - Osada, Minoru

AU - Terakado, Nobuaki

AU - Fujiwara, Takumi

PY - 2015

Y1 - 2015

N2 - We have synthesized Mn4+-doped mixed tetragermanate phases in the Li2Ge4O9LiNaGe4O9 system, i.e., Li(Li,Na)Ge4O9, by a glass-ceramic technique using stoichiometric precursor glasses, and have examined the effect of substitution of Na on their photoluminescence properties. The tetragermanate phases indicated clear red emission based on a 2E→4A2 transition, and the entire substitution resulting in an LiNaGe4O9 phase provided an improvement of quenching temperature for the emission. Furthermore, the LiNaGe4O9 phase synthesized by solid-state reaction showed a high internal quantum yield and red color purity, demonstrating it to be a possible candidate as a rare-earth-free red phosphor.

AB - We have synthesized Mn4+-doped mixed tetragermanate phases in the Li2Ge4O9LiNaGe4O9 system, i.e., Li(Li,Na)Ge4O9, by a glass-ceramic technique using stoichiometric precursor glasses, and have examined the effect of substitution of Na on their photoluminescence properties. The tetragermanate phases indicated clear red emission based on a 2E→4A2 transition, and the entire substitution resulting in an LiNaGe4O9 phase provided an improvement of quenching temperature for the emission. Furthermore, the LiNaGe4O9 phase synthesized by solid-state reaction showed a high internal quantum yield and red color purity, demonstrating it to be a possible candidate as a rare-earth-free red phosphor.

KW - Germanate

KW - Manganese ion

KW - Phosphor

KW - Rare-earth free

KW - Red emission

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