Size dependence of the luminescence spectra and dynamics of Eu3+:Y2O3 nanocrystals

Autor:	Huabiao Yuan, fnm>B.M.>>>fnm>Brian M Tissue, Diane K Williams
Rok vydání:	1999
Předmět:	Photoluminescence Chemistry Biophysics Analytical chemistry General Chemistry Condensed Matter Physics Biochemistry Molecular physics Atomic and Molecular Physics and Optics Spectral line Nanocrystalline material Nanocrystal Phase (matter) Particle size Monoclinic crystal system Line (formation)
Zdroj:	Journal of Luminescence. :297-300
ISSN:	0022-2313
DOI:	10.1016/s0022-2313(99)00114-3
Popis:	We report the optical spectra and lifetimes of nanocrystalline Eu3+ : Y2O3 as a function of particle diameter from 15 to 7 nm. As the particle size decreases, the spectra show increased line broadening and the emergence of a disordered phase. The 7-nm sample also contains cubic-phase material in addition to the monoclinic phase that is usually produced by the gas-phase-condensation synthesis. The 5 D 0 lifetimes increase by more than a factor of two when the particle size decreases from approximately 15–7 nm, with the decay transients becoming non-single exponential for the 13-nm and smaller particles.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6c786970c3a047e1e141889a43ebb9e9 https://doi.org/10.1016/s0022-2313(99)00114-3 Zobrazit plný text záznamu Full Text from ScienceDirect