Dependence of fluorescence lifetimes of Y2O3 : Eu3+ nanoparticles on the surrounding medium

Files
TR Number
Date
1999-11
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract

The radiative lifetime, tau(R), of the D-5(0) metastable excited state of Eu3+ ions in nanocrystalline monoclinic Y2O3 samples is about four times longer than that in the micron size powder of the same material. The Eu3+ radiative lifetime was measured in nanocrystals surrounded with air as well as those immersed in different liquids. It is shown that the radiative lifetime changes with the index of refraction of the immersion medium and provides a unique test of the standard formula relating tau(R) and the oscillator strength. The magnitude of the effect is determined by the "filling factor" (the fraction of the sample volume occupied by nanocrystals) which can therefore be determined. [S0163-1829(99)51144-2].

Description
Keywords
eu3+y2o3 nanocrystals, physics, condensed matter
Citation
Meltzer, R. S.; Feofilov, S. P.; Tissue, B.; Yuan, H. B., "Dependence of fluorescence lifetimes of Y2O3 : Eu3+ nanoparticles on the surrounding medium," Phys. Rev. B 60, R14012(R) DOI: http://dx.doi.org/10.1103/PhysRevB.60.R14012