Paper Title:
Promising Zn3Ta2O8:Pr3+ Red Phosphor for Low Voltage Cathodoluminescence Applications
  Abstract

Zn3Ta2O8 is a promising host for low voltage cathodoluminescence (CL) applications. Surface chemical stability during low voltage electron beam excitation is a prime concern for phosphors to be used in various new generation information displays. Photoluminescence (PL) and CL characteristics of the Zn3Ta2O8 host doped with Pr3+ are presented. The phosphors were synthesized via solid-state reaction route at 1100°C. Red CL or PL with a maximum at 611 nm, attributed to the 1D2-3H4 transition of the Pr3+ ion, was observed at room temperature under high energy electron (2 keV, 12 μA) or a monochromatic xenon lamp (257 nm) irradiation. Electron stimulated chemical changes on the surface of the Zn3Ta2O8:Pr3+ phosphor during an electron beam exposure from 0-350 C/cm2 was monitored using Auger electron spectroscopy. The CL exhibited only a 20% loss in the original intensity during the continuous electron beam exposure. X-ray photoelectron spectroscopy (XPS) was used to estimate the redox states of the chemical constituents and a comparison of binding energies was made with the standard Ta2O5 and ZnO compounds. A correlation between the structural configuration of Zn3Ta2O8 and the XPS data is also established.

  Info
Periodical
Advanced Materials Research (Volumes 306-307)
Chapter
Chapter 3: Optical and Electronic Materials
Edited by
Shiquan Liu and Min Zuo
Pages
251-254
DOI
10.4028/www.scientific.net/AMR.306-307.251
Citation
S. S. Pitale, L.L. Noto, I.M. Nagpure, O.M. Ntwaeaborwa, J.J. Terblans, H. C. Swart, "Promising Zn3Ta2O8:Pr3+ Red Phosphor for Low Voltage Cathodoluminescence Applications", Advanced Materials Research, Vols. 306-307, pp. 251-254, 2011
Online since
August 2011
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Price
$32.00
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