CeF3-based glass ceramic: a potential luminescent host for white-light-emitting diode

Area of Science:

• Materials Science
• Nanotechnology
• Solid-State Chemistry

Background:

• Glass-ceramics offer tunable optical properties.
• Nanocrystals enhance material performance.
• Rare earth ions are crucial for luminescence applications.

Purpose of the Study:

• To fabricate rare earth ion-doped glass ceramics with hexagonal CeF3 nanocrystals.
• To investigate the incorporation and luminescence of rare earth ions within the CeF3 nanocrystal matrix.
• To assess the potential of these materials for white-light-emitting diode (WLED) applications.

Main Methods:

• Fabrication of glass ceramics doped with rare earth ions.
• Characterization using techniques sensitive to local structure and luminescence (e.g., Stark splitting emissions).
• Evaluation of energy transfer efficiency between different rare earth ions (Ce3+, Eu3+, Tb3+, Dy3+).

Main Results:

• Successfully synthesized glass ceramics containing hexagonal CeF3 nanocrystals (12 nm mean size).
• Eu3+ luminescence indicated partitioning of rare earth ions into the CeF3 nanocrystals.
• Efficient energy transfer observed from Ce3+ to Tb3+ and Dy3+.
• Dy3+-doped samples exhibited intense white-light emission under UV excitation.

Conclusions:

• Rare earth ions preferentially incorporate into the low-phonon-energy CeF3 nanocrystals.
• The observed energy transfer mechanisms are efficient.
• Dy3+-doped CeF3 glass ceramics show promise for WLED applications due to their white-light emission properties.