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Evolution of Strong Red Upconversion Luminescence in Er3+-Containing Oxy-Fluoride Glass and Glass-Ceramics

Authors

  • Jihong Zhang,

    1. Division of Advanced Nuclear Engineering, Department of Materials Science and Engineering, Center for Information Materials, Pohang University of Science and Technology (POSTECH), Hyoja-dong, Pohang, Gyeongbuk, Korea
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  • Chao Liu,

    1. State Key Laboratory of Silicate Materials for Architecture, Wuhan University of Technology, Wuhan, Hubei, China
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  • Jong Heo

    Corresponding author
    1. Division of Advanced Nuclear Engineering, Department of Materials Science and Engineering, Center for Information Materials, Pohang University of Science and Technology (POSTECH), Hyoja-dong, Pohang, Gyeongbuk, Korea
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Abstract

The Er3+ concentration dependencies of upconversion luminescence in oxy-fluoride glass and glass-ceramics containing PbF2 nanocrystals were investigated. Strong red emission from the 4F9/2 → 4I15/2 transition was observed with the addition of ~0.8 mol% Er3+ ions, whereas ~10 mol% of Er3+ is required to achieve such emission in several other crystalline hosts. Intensities of red emission further increased with the formation of nanocrystals through heat treatment. The Er3+ ions enriched in glass and segregated preferentially inside the PbF2 nanocrystals that decreased the distance among Er3+ ions and thereby facilitated energy transfer.

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