Mn-doped LiNaGe4O9 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 journalArticlepeer-review

9 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)888-891
Number of pages4
JournalJournal of the Ceramic Society of Japan
Volume123
Issue number1441
DOIs
Publication statusPublished - 2015 Jan 1

Keywords

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

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Mn-doped LiNaGe<sub>4</sub>O<sub>9</sub> as a rare-earth free phosphor: Impact of Na-substitution on emission in tetragermanate phase'. Together they form a unique fingerprint.

Cite this