dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2018-12-11T17:26:54Z | |
dc.date.available | 2018-12-11T17:26:54Z | |
dc.date.created | 2018-12-11T17:26:54Z | |
dc.date.issued | 2015-01-01 | |
dc.identifier | Materials Science Forum, v. 820, p. 378-383. | |
dc.identifier | 0255-5476 | |
dc.identifier | http://hdl.handle.net/11449/177742 | |
dc.identifier | 10.4028/www.scientific.net/MSF.820.378 | |
dc.identifier | 2-s2.0-84955511589 | |
dc.description.abstract | Ferroelectric semiconductors oxides with tetragonal tungsten bronze TTB-type structure doped with rare earth ions have been investigated in recent years due their promising optical properties. K2Nd(1-x)EuxNb5O15 nanopowders, where x = 0, 0. 0025, 0. 025, 0. 05 and 0. 1 were synthesized by the modified polyol method and characterized by X-ray diffraction and diffuse reflectance spectroscopy UV-Vis. Single phase and crystalline powders of tetragonal symmetry with non-centrosymmetric space group P4bm were obtained. The diffuse reflectance spectra were similar to the profile of a semiconductor material with the presence of thin transitions of Eu3+ in europium-doped K2NdNb5O15, as well as the transitions of Nd3+. The method of Kubelka-Munk was used for the estimation of bandgap energy. The values around 3. 7 eV showed small variation with the concentration of Eu3+ ions in the K2NdNb5O15 host structure. The transitions were identified as direct ones type. | |
dc.language | eng | |
dc.relation | Materials Science Forum | |
dc.relation | 0,180 | |
dc.rights | Acesso aberto | |
dc.source | Scopus | |
dc.subject | Niobate | |
dc.subject | Optical gap | |
dc.subject | Semiconductor | |
dc.title | Study of the influence of Eu3+ ions in the bandgap of K2NdNb5O15Nanopowders | |
dc.type | Actas de congresos | |