CsCl Modified Ge–Ga–S Glasses Codoped with Eu2+ and Mn2+: A Potential Yellow Phosphor for Solid-State Lighting

Authors

  • Qiqi Yan,

    1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
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  • Jing Ren,

    Corresponding author
    • Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
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  • Guorong Chen

    1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
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Author to whom correspondence should be addressed. e-mail: jing.ren@ecust.edu.cn

Abstract

Notably enhanced Mn2+ yellow emission is observed in CsCl modified and Eu2+/Mn2+ codoped GeGaS glasses under near-ultraviolet (NUV) excitation. The plausible efficiency of energy transfer (ET) from Eu2+ to Mn2+ is as high as 91%, which is obtained by measurement of luminescence decay of Eu2+ in samples doped with and without Mn2+. The Eu2+/Mn2+ codoping significantly increases the excitation cross section at the NUV region, which is at heart of the enhanced Mn2+ yellow emission. The ET processes responsible for the enhanced luminescence are discussed.

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