Abstract
Present article report on structural and optical investigations of doubly doped Y3(Al5-xGax)O12:Ce/Eu nanophosphor. Efforts have been made to explore the interaction between the Ce3+ and Eu3+ ions and subsequently variation in overall color perception. Experimental techniques namely XRD, HR-TEM, and SEM reveal precipitation of tiny particles with diameter ~22 nm. Structural refinement has been carried out by Rietveld refinement. Photo-excitation by 342, 405, 450, and 464 nm wavelengths triggers the emission from Eu3+ and Ce3+ ions. Further, the laser excitations by 405 nm and 450 nm radiations, induced YAGG:Ce/Eu nanophosphor to yield combinatorial emission of both Ce3+ and Eu3+ ions; though, the intensity was found to be altered due to the two-way ionic interaction between the doped ions. The resultant emission extended in the red region. Also, the doubly doped sample exhibits strong temperature reliance on the emission intensity in the temperature range extended over 273–388 K. The color perception of the nanophosphor was observed to be significantly modified at different excitation wavelengths, temperatures, and laser powers as reflected by CIE coordinates.
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