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Room temperature photoluminescence of BCT prepared by Complex Polymerization Method |
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| Authors: | F.V. Motta A.P.A. Marques J.W.M. Espinosa P.S. Pizani E. Longo J.A. Varela |
| Affiliation: | 1. LIEC, Departamento de Físico-química, Instituto de Química, Universidade Estadual Paulista, R. Francisco Degni, s/n, Bairro Quitandinha, 14801-907 Araraquara-SP, Brazil;2. LIEC, Departamento de Química, Universidade Federal de São Carlos, P.O. Box 676, 13565-905 São Carlos, SP, Brazil;3. Departamento de Engenharia de Produção, Universidade Federal de Goiás, 75704-020 Catalão, GO, Brazil;4. Laboratório de Semicondutores, Departamento de Física, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil |
| Abstract: | It was used the Complex Polymerization Method to synthesize barium calcium titanate powders (BCT). Crystalline Ba0.8Ca0.2TiO3 perovskite-type phase could be identified by X-ray diffraction and confirmed by Raman spectroscopy in the powders heat treated at 600 °C. Inherent defects, linked to structural disorder, facilitate the photoluminescence emission. The photoluminescent emission peak maximum was around of 533 nm (2.33 eV) for the Ba0.8Ca0.2TiO3. The photoluminescence process and the band emission energy photon showed dependence of both the structural order–disorder and the thermal treatment history. The results revealed that Ba0.8Ca0.2TiO3 (BCT20) is a highly promising candidate material for optical applications. |
| Keywords: | Barium calcium titanate Order– disorder transition Optical properties Photoluminescence |
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