Synthesis and Characterization of Ce-Doped Y3Al5O12 (YAG:Ce)‎ Nanopowders Used for Solid-State Lighting

الملخص EN

Nano-Ce-doped Y3Al5O12 (YAG:Ce) powders were synthesized by using a sol-gel low temperature combustion method, followed by thermal annealing.

The annealing temperature for enriching nanoparticles was optimized and found to be 1000°C.

The process for enriching uniform nanoparticles of YAG:Ce powder was carried out by using the nanosteam technique (NST).

The nanoparticles obtained from this NST treatment had a size in the range of 9–20 nm.

Measurements of the photoluminescence spectra of the dispersed YAG:Ce nanoparticles solutions showed a blue shift in the photoemission with a value of ca.

10 nm in the green region.

WLEDs made from the blue LED chip coated with the nano-YAG:Ce + MEH-PPV composite epoxy exhibit white light with a broad band luminescent spectrum and a high color rending index (CRI).

The photoluminescence spectra of the YAG:Ce nanoparticles showed a potential application of the prepared nanostructured YAG:Ce phosphor not only in energy-efficient solid-state lighting, but also in optoelectronic devices, including organic composite solar cells.

In addition, it is suggested that NST can be applied for the enrichment of uniform inorganic nanoparticles.