Temperature dependence of photoluminescence from CdSe nanocrystals embedded in silica matrix

Utilize este identificador para referenciar este registo: https://hdl.handle.net/1822/17184

Título:	Temperature dependence of photoluminescence from CdSe nanocrystals embedded in silica matrix
Autor(es):	Chahboun, A. Levichev, S. Rolo, Anabela G. Conde, O. Gomes, M. J. M.
Palavras-chave:	CdSe Nanocrystals Photoluminescence Temperature dependence Thermal expansion
Data:	21-Jul-2009
Editora:	Elsevier 1
Revista:	Journal of Luminescence
Resumo(s):	In this work, CdSe nanocrystals (NCs) embedded in SiO(2) matrix were grown by radio frequency (RF)sputtering technique. X-ray technique was used to characterise the structural properties of the system. The NC's size was estimated to be around 4 +/- 1 nm in diameter. The temperature dependence of the photoluminescence from the CdSe/SiO(2) System showed carriers thermal exchange between the NCs and deep defects in the matrix. The evolution of the excitonic energy emission with temperature is about 10 meV in the temperature range 15-295 K. This weak shift was explained by thermal mismatch between the matrix and the NCs.
Tipo:	Artigo
URI:	https://hdl.handle.net/1822/17184
DOI:	10.1016/j.jlumin.2009.06.007
ISSN:	0022-2313
Versão da editora:	http://www.sciencedirect.com/
Arbitragem científica:	yes
Acesso:	Acesso restrito UMinho
Aparece nas coleções:	CDF - FMNC - Artigos/Papers (with refereeing)