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 journalArticle

6 Citations (Scopus)

Abstract

We have synthesized Mn<sup>4+</sup>-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 <sup>2</sup>E→<sup>4</sup>A<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 languageEnglish
Pages (from-to)888-891
Number of pages4
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume123
Issue number1441
DOIs
Publication statusPublished - 2015
Externally publishedYes

Fingerprint

Phosphors
Rare earths
phosphors
Substitution reactions
rare earth elements
substitutes
glass
Glass ceramics
Quantum yield
Solid state reactions
Quenching
Photoluminescence
purity
quenching
ceramics
Color
solid state
photoluminescence
color
Glass

Keywords

  • Germanate
  • Manganese ion
  • Phosphor
  • Rare-earth free
  • Red emission

ASJC Scopus subject areas

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

Cite this

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 journalArticle

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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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.",
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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

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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.

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