Application of red light-emitting diodes using Mg3.5Ge 1.25O6:Mn4+ phosphor

Seung Jae Lee, Jongjin Jung, Ja Young Park, Hye Mi Jang, Yong Rok Kim, Joung Kyu Park

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Mg3.5Ge1.25O6:Mn4+ was synthesized by a solid-state reaction and its photoluminescence characteristics were investigated. The synthesized phosphor showed a narrow emission band between 600 and 700 nm with two clear peaks at 632 and 660 nm and two obscure peaks at 626 and 653 nm due to the 2E→4A2 transition of Mn4+ex=405 nm). Red light-emitting diodes (LEDs) were fabricated through the integration of an InGaN UV chip (λem=405 nm) and Mg3.5Ge1.25O 6:Mn4+ phosphor in a single package. Red LEDs showed CIE chromaticity with values of x=0.32 and y=0.10 and the color temperature of 4900 K.

Original languageEnglish
Pages (from-to)108-111
Number of pages4
JournalMaterials Letters
Publication statusPublished - 2013

Bibliographical note

Funding Information:
This work is supported by Korea Research Council for Industrial Science and Technology ( SI-1308 ) and the Korean Ministry of Science and Technology ( KK-1307-B6 ). This work is also supported by the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning ( 2013009204 ).

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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