TITLE:
Blue-Red Tuning Emission of ZnO: Europium Quantum Dots with Different Excitation Wavelengths
AUTHORS:
Primitivo Ortiz Maldonado, Ana K. Chavez-Alvarado, Francisco J. Rodríguez Gutierrez, Joan Reyes Miranda, Dulce Y. Medina Velazquez, Miguel A. Barron, Elizabeth Garfias García
KEYWORDS:
Chromaticity Diagram, Emission Spectra, Europium Luminescence, Red-Blue Tuning, ZnO Quantum Dots, White Light
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.8 No.10,
October
12,
2018
ABSTRACT: Optoelectronic applications require the development of new fluorescent
and efficient luminescent materials, free of toxicity, low in cost, and easy to
produce. In this way the synthesis of zinc-oxide (ZnO) quantum dots (QDs) has
recently received special attention due to their good optical, electrical and
chemical properties with low production costs and blue light emission. In this
work ZnO QDs were successfully doped with europium in order to obtain a tunable
emission luminescence from blue emission of ZnO to red emission of europium as
a function of wavelength excitation. Results show an efficient blue to red
tuning when the excitation wavelength was changed from 317 nm to 395 nm,
respectively. This opens the possibility of having new optical devices to
produce different color emission using the same material.