Realizing Superior Luminescence in Oxyfluoride Glass-Ceramics by Enhancing Nano-Micro Phase Separation

Zhencai Li, J.H. Li, C.Y. Chen, S. Li, J. Hu, Johan Frederik Schou Christensen, D.C. Zhou, Lars Rosgaard Jensen, J.C. Ni, X.S. Qiao, J.C. Du, Morten Mattrup Smedskjær, K. Shibuya, Y.F. Zhang, J.B. Qiu*, J.J. Ren*, Yuanzheng Yue*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

1 Citation (Scopus)


In this work, a novel series of oxyfluoride glasses-ceramics (GCs) is developed by enhancing the phase separation through the substitution of LaF3 for La2O3. The thus-derived GCs exhibit a remarkable 2700-fold increase in up-conversion (UC) luminescence of Er3+ ions compared to the precursor glass. From the 19F Nuclear Magnetic Resonance analysis, this enhancement is attributed to the structural disorder-to-order transition in the fluoride-rich phase. Upon isothermal heat treatment, the translucent GCs transform into transparent ones, making UC luminescence even stronger. The enhanced UC luminescence leads to strong temperature-sensing ability of the studied glasses. The nano-micro phase separation is clarified by atomistic simulations and scanning electron microscopy. This study implies that phase separation engineering is a powerful way to achieve superior photonic performances.

Original languageEnglish
Article number2301999
JournalAdvanced Optical Materials
Issue number7
Number of pages12
Publication statusPublished - 5 Mar 2024


  • nanocrystals
  • phase separation engineering
  • temperature-sensing
  • transparent glass-ceramics
  • up-conversion luminescence


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