Photoluminescence properties of BaMoO4 amorphous thin films

Marques, Ana Paula Azevedo; Melo, Dulce Maria de Araújo; Silva, Elson Longo da; Paskocimas, Carlos Alberto; Pizani, Paulo Sérgio; Leite, Edson Roberto

Photoluminescence properties of BaMoO4 amorphous thin films

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dc.contributor.author	Marques, Ana Paula Azevedo
dc.contributor.author	Melo, Dulce Maria de Araújo
dc.contributor.author	Silva, Elson Longo da
dc.contributor.author	Paskocimas, Carlos Alberto
dc.contributor.author	Pizani, Paulo Sérgio
dc.contributor.author	Leite, Edson Roberto
dc.date.accessioned	2021-04-20T14:52:35Z
dc.date.available	2021-04-20T14:52:35Z
dc.date.issued	2005-07
dc.description.resumo	BaMoO4 amorphous and crystalline thin films were prepared from polymeric precursors. The BaMoO4 was deposited onto Si wafers by means of the spinning technique. The structure and optical properties of the resulting films were characterized by FTIR reflectance spectra, X-ray diffraction (XRD), atomic force microscopy (AFM) and optical reflectance. The bond Mo–O present in BaMoO4 was confirmed by FTIR reflectance spectra. XRD characterization showed that thin films heat-treated at 600 and 200 1C presented the scheelite-type crystalline phase and amorphous, respectively. AFM analyses showed a considerable variation in surface morphology by comparing samples heat-treated at 200 and 600 1C. The reflectivity spectra showed two bands, positioned at 3.38 and 4.37 eV that were attributed to the excitonic state of Ba2+ and electronic transitions within MoO24 , respectively. The optical band gaps of BaMoO4 were 3.38 and 2.19 eV, for crystalline (600 1C/2 h) and amorphous (200 1C/8 h) films, respectively. The room-temperature luminescence spectra revealed an intense single-emission band in the visible region. The PL intensity of these materials was increased upon heat-treatment. The excellent optical properties observed for BaMoO4 amorphous thin films suggested that this material is a highly promising candidate for photoluminescent applications	pt_BR
dc.identifier.citation	MARQUES, Ana Paula Azevedo; MELO, Dulce M.A. de; LONGO, Elson; PASKOCIMAS, Carlos A.; PIZANI, Paulo S.; LEITE, Edson R.. Photoluminescence properties of BaMoO4 amorphous thin films. Journal Of Solid State Chemistry, [S.L.], v. 178, n. 7, p. 2346-2353, jul. 2005. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S002245960500229X?via%3Dihub. Acesso em: 20 mar. 2021. http://dx.doi.org/10.1016/j.jssc.2005.05.024.	pt_BR
dc.identifier.issn	10.1016/j.jssc.2005.05.024
dc.identifier.issn	0022-4596
dc.identifier.uri	https://repositorio.ufrn.br/handle/123456789/32291
dc.language	en	pt_BR
dc.publisher	Elsevier	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	BaMoO4	pt_BR
dc.subject	Photoluminescence	pt_BR
dc.subject	Thin films	pt_BR
dc.subject	Polymeric precursor method	pt_BR
dc.subject	Amorphous	pt_BR
dc.title	Photoluminescence properties of BaMoO4 amorphous thin films	pt_BR
dc.type	article	pt_BR