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Synthesis and Characteristics of the Zinc Effects on Eu3+ Doped (Zn,Ca)TiO3 Phosphors

Published online by Cambridge University Press:  17 July 2013

B. Hemalatha Rudramadevi ,
S. Buddhudu  and
Piyush Bhatt
B. Hemalatha Rudramadevi
Affiliation:
School of Physics, Madurai Kamaraj University, Madurai, Tamil Nadu, India.
S. Buddhudu
Affiliation:
Department of Physics, Sri Venkateswara University, Tirupati, Andhra Pradesh, India.
Piyush Bhatt
Affiliation:
Department of Electrical Engineering, Indian Institute of Technology Bombay, Bombay, India.
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Abstract

For the purpose of development of highly energy-efficient light sources, one needs to design highly efficient green, red and yellow phosphors, which are able to absorb excitation energy and generate emissions. In this contribution, we present our results on producing some efficient phosphors with improved luminescence properties. The effects of zinc on the zinc-doped CaTiO3:Eu3+ phosphors have been investigated by varying the zinc concentrations. X-ray powder diffraction (XRD) and Scanning electron microscopy (SEM) characterizations were studies for their structural and morphological analysis. The variation of zinc concentration influences the crystallinity and morphology of the phosphors. The luminescence spectra of (Zn,Ca)TiO3: Eu3+ have been measured. Eu3+: (Zn,Ca)TiO3 have shown five emission transitions of 5D0→7F 0,1,2,3 & 4 located at 580 nm,593nm 615 nm,655 and 704 respectively with excitation at λexci=398nm (7F0→5L6). Moreover, the emitting phosphor developed in this study can be very effectively excited at the wavelengths of 398 nm. The (Zn, Ca)TiO3:Eu3+ can be used as a complementary phosphor in there red region for the white LEDs.

Keywords

oxidelaserpolycrystal
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1565: Symposium HH – Materials for High-Performance Photonics II , 2013 , mrss13-1565-hh03-06
Copyright
Copyright © Materials Research Society 2013 

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