Photoluminescence of CdSe nanocrystals embedded in a SiOx thin film matrix

Nesheva, D; Raptis, C; Levi, Z; Popovic, Z; Hinic, I

dc.contributor.author	Nesheva, D	en
dc.contributor.author	Raptis, C	en
dc.contributor.author	Levi, Z	en
dc.contributor.author	Popovic, Z	en
dc.contributor.author	Hinic, I	en
dc.date.accessioned	2014-03-01T01:15:03Z
dc.date.available	2014-03-01T01:15:03Z
dc.date.issued	1999	en
dc.identifier.issn	0022-2313	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13310
dc.subject	photoluminescence	en
dc.subject	nanocrystals	en
dc.subject	thin films	en
dc.subject	defect states	en
dc.subject	vacuum deposition	en
dc.subject	CdSe nanocrystals	en
dc.subject	SiOx glassy matrix	en
dc.subject.classification	Optics	en
dc.subject.other	Absorption spectroscopy	en
dc.subject.other	Crystal defects	en
dc.subject.other	Deposition	en
dc.subject.other	Electron energy levels	en
dc.subject.other	Energy gap	en
dc.subject.other	Nanostructured materials	en
dc.subject.other	Semiconducting cadmium compounds	en
dc.subject.other	Silica	en
dc.subject.other	Thin films	en
dc.subject.other	Vacuum applications	en
dc.subject.other	Cadmium selenide	en
dc.subject.other	Vacuum deposition	en
dc.subject.other	Photoluminescence	en
dc.title	Photoluminescence of CdSe nanocrystals embedded in a SiOx thin film matrix	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0022-2313(99)00043-5	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0022-2313(99)00043-5	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	Room- and low-temperature photoluminescence studies are reported on CdSe nanocrystals embedded in an SiOx thin film matrix. The main spectral feature for all samples and both temperatures is a broad band whose position does not change considerably with nanocrystallite size. The band is assigned to recombination through defect states, whose energy depends on the nanocrystallite size in such a way that they counter-balance the similar dependence of the optical band gap on the nanocrystallite size. A noticeable asymmetry on the low-energy side of this band at low temperatures is attributed to the existence of a variety of surface defect states and/or a large number of volume defect states in these nanocrystals. There is evidence to suggest that the energy band diagram of CdSe nanocrystals in SiOx matrix is considerably different from that of SiOx/CdSe multi-quantum wells. (C) 1999 Elsevier Science B.V. All rights reserved.	en
heal.publisher	Elsevier Science Publishers B.V., Amsterdam, Netherlands	en
heal.journalName	Journal of Luminescence	en
dc.identifier.doi	10.1016/S0022-2313(99)00043-5	en
dc.identifier.isi	ISI:000081962700007	en
dc.identifier.volume	82	en
dc.identifier.issue	3	en
dc.identifier.spage	233	en
dc.identifier.epage	240	en