Photoluminescent characterization of trivalent samarium activated aluminates based nano-crystals for advanced photonic applications

Abstract

Down-conversion reddish-orange light emanating trivalent samarium doped aluminates-based nano-materials were successfully prepared via ecological urea-combustion approach after sintering at 550 °C. X-ray powder diffractometer revealed tetragonal symmetry with P-42₁m phase group. Non-uniform agglomerated particles of 40–50 nm crystal size were examined by utilizing, scanning electron microscopy and transmission electron microscopy technique. Upon near-ultraviolet excitation, generated phosphors illustrate reddish-orange emanation with a high quantum efficiency (82.2%) and color purity (82.99%). Finally, high emanation performance is measured in terms of chromaticity color parameters like color coordinates (0.5380, 0.4591), 2200.38 K, correlated color temperature, and color purity (82.99%). All these results certified that the generated nano-crystals can be certainly applicable for advanced photonic appliances, signage, lasers, and warm white light-emitting diodes.

Keywords:

• Color-purity
• combustion synthesis
• nanophosphors
• opto-electronics materials
• quantum efficiency
• spectroscopic

Disclosure statement

The authors proclaim no conflicts of interest regarding the reported research work.

Additional information

Funding

The present work was financially supported by the Council of Scientific and Industrial Research (CSIR), New Delhi, India via SRF [09/382/(0216)/2019-EMR-I].