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http://acervodigital.unesp.br/handle/11449/26173
- Title:
- Investigação de Er3+ nos dois sítios cristalográficos de Gd2SiO5 através da fotoluminescência resolvida no tempo
- Investigation of Er3+ in the two crystallographic sites of Gd2SiO5 by time resolved photoluminescence
- Universidade Estadual Paulista (UNESP)
- Universidade de São Paulo (USP)
- 0100-4042
- Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
- Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
- Gadolinium oxyortho-silicate, Gd2SiO5, presents a monoclinic structure with two crystallographic sites in which Gd3+ ions are equally distributed with coordination numbers CN, 7 and 9, respectively. By doping this host with Er3+ it is possible to distinguish and attribute the two sites by means of lifetime determination of the 4S3/2 state, (in this case, Er3+ substitutes Gd3+ ions). Samples doped with 0.1 and 5.0% molar Er3+ were prepared by solid state reaction and characterized by X-ray Diffractometry, Vibrational and Electronic Absorption Spectroscopies, and Time Resolved Photoluminescence. Based on the experimental results, it is possible to verify that, for the 5,0% doped sample, the lifetime value of the 4S3/2 state of the erbium ion inserted in site 1, (CN = 9), is 2.7 ± 0.1 mus, and for the one inserted in site 2, (CN = 7), it is 1.5 ± 0.1 mus.
- 1-Dec-2000
- Química Nova. Sociedade Brasileira de Química, v. 23, n. 6, p. 742-748, 2000.
- 742-748
- Sociedade Brasileira de Química
- gadolinium oxyorthosilicate
- erbium
- time resolved photoluminescence
- http://dx.doi.org/10.1590/S0100-40422000000600006
- Acesso aberto
- outro
- http://repositorio.unesp.br/handle/11449/26173
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