Blue emitting Ce3+ -doped CaYAl3O7 phosphors prepared by combustion route

Choi, Yong-Keun and Halappa, Pramod and Shivakumara, C and Dubey, Vikas and Singh, Vijay (2019) Blue emitting Ce3+ -doped CaYAl3O7 phosphors prepared by combustion route. In: OPTIK, 181 . pp. 1113-1121.

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Abstract

The solution-combustion route was used to synthesize series of Ce3+-ion-activated CaYAl3O7 (CYO) blue-light-emitting phosphors. Formation of the tetragonal CYO structure was confirmed by the powder X-ray diffraction (XRD) studies. On substitution of Ce3+ ion to Ca site in CaYAl3O7 system, the photoluminescence spectra recorded at ultraviolet-light (360 nm) excitation. Photoluminescence excitation spectra at 360 nm showed the characteristic emission at 434 nm of the Ce3+ ion caused by 5d -> 4f transitions. Increase in intensity can be seen up to 1 mol % of Ce3+ followed by quenching due to dipole-dipole interaction. The Commission Internationale de l'Eclairage (CIE - 1931) coordinates x = 0.1484 and y = 0.0987 of this phosphor are in the violet blue region. The blue-color purity was found to be maximum 90% for 1 mol% Ce3+-doped phosphor. The obtained CIE, CCT, and color-purity results illustrate the potentiality of Ce3+ activated CYO phosphor for household-lighting and display-device applications.

Item Type:	Journal Article
Publication:	OPTIK
Publisher:	ELSEVIER GMBH
Additional Information:	Copyright of this article belongs to ELSEVIER GMBH
Keywords:	Phosphor; Ce3+; CaYAl3O7; Combustion
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	24 May 2019 10:45
Last Modified:	24 May 2019 10:45
URI:	http://eprints.iisc.ac.in/id/eprint/62638

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