Yttrium aluminum garnet based novel and advanced phosphor synthesized by combustion route activated by Dy, Eu, and Tb rare earth metals

In the present studies, rare earth (Dy, Eu, and Tb) activated garnet-based (Y3Al5O12) phosphors were prepared using the combustion method at 550 degrees C. The formation of the compounds has been checked by powder X-ray diffraction and structural parameters were calculated. The crystallite/particle size has been measured using Scherrer formula as well as by transmission electron microscopy which show that the size of the particles is in the nanorange. In the photoluminescence emission spectra, YAG:Dy-0.05 emits two distinctive colors: blue and yellow, YAG:Eu-0.05 emits red color, whereas YAG:Tb-0.02 emits green phosphor. Thus, the combination of rare earth (Dy-0.05,Dy- Eu-0.05,Eu- Tb-0.02) with garnet gives BYRG (blue-yellow-red-green) emissions can produce white light. These discussed phosphors exhibit a strong absorption between 340 and 400 nm. The energy transfer mechanism was also discussed. The higher luminescence color purity (95.68%), Color Rendering Index (95), Correlated Color Temperature (5287 K), and Quantum efficiency (93.7%) are calculated, therefore, synthesized Y3Al5O12Dy0.05Eu0.05Tb0.02 phosphor material can be used as a WLED phosphor materials in solid-state lighting system.

Automated summary

In this study, rare earth (Dy, Eu, and Tb) activated garnet-based (Y3Al5O12) phosphors were synthesized using the combustion method. The resulting phosphors exhibited blue, yellow, red, and green emissions, suggesting their potential application as white light LED phosphor materials.