High thermal stability of red emission in Mn-doped benitoite-type strontium silicogermanate

Rie Suzuki, Yoshihiro Takahashi, Kenichiro Iwasaki, Nobuaki Terakado, Takumi Fujiwara

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We assessed the photoluminescence performance characteristics of Mn4+-doped tetragermanate and silicogermanate phases with a benitoitetype structure. We observed a visible red emission based on the 2E→4A2 transition in the doped benitoite-type tetragermanate. The partial substitution of Si for Ge, resulting in SrGe3.495Mn0.005Si0.5O9, improved the internal quantum efficiency and thermal stability of the red emission. A possible explanation of the substitution effect was reasonably presented on the basis of the connectivity of luminescent polyhedral units and the decrease in the Franck-Condon off-set value in the benitoite structure.

Original languageEnglish
Article number072603
JournalApplied Physics Express
Issue number7
Publication statusPublished - 2015 Jul 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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