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Solid state white light emitting systems based on CeF3: RE3+ nanoparticles and their composites with polymers
Farheen N Sayed1, V Grover, K A Dubey
1Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
Journal of Colloid and Interface Science
|October 29, 2010
Summary
Researchers synthesized doped cerium fluoride (CeF3) nanoparticles for white light emission. The resulting nanoparticles and nanocomposite films show efficient photoluminescence, making them suitable for UV-based light-emitting diodes (LEDs).
Area of Science:
- Materials Science
- Nanotechnology
- Luminescence
Background:
- Developing efficient phosphors for white light emission is crucial for solid-state lighting.
- Cerium fluoride (CeF3) is a promising host material for luminescent nanoparticles.
Purpose of the Study:
- To synthesize doped CeF3 nanoparticles for white light emission.
- To investigate energy transfer mechanisms and optimize doping concentrations.
- To evaluate the potential of these nanoparticles in UV-based LEDs.
Main Methods:
- Polyol synthesis route at 160°C.
- Characterization using XRD, HR-TEM, FT-IR, and photoluminescence spectroscopy.
- Fabrication of PMMA and PVA nanocomposite films.
Main Results:
- Uniform, water-dispersible CeF3:RE3+ nanoparticles were synthesized.
- Efficient energy transfer from CeF3 host to Tb3+, Eu3+, and Dy3+ activators was confirmed.
- Optimized triply doped CeF3 nanoparticles exhibited white light emission with daylight-like chromaticity.
- Nanocomposite films showed high transparency and strong photoluminescence.
Conclusions:
- Doped CeF3 nanoparticles are effective white light-emitting phosphors.
- The synthesized materials are suitable for applications in UV-based LEDs and optoelectronic devices.
- Nanocomposite films offer excellent optical properties for further device integration.
