| Texto completo | |
| Autor(es): |
Moreno, H.
;
Damm, M.
;
Freitas, S. M.
;
Rezende, M. V. S.
;
Simoes, A. Z.
;
Biasotto, G.
;
Mastelaro, V. R.
;
Teixeira, V. C.
;
Ramirez, M. A.
Número total de Autores: 9
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Alloys and Compounds; v. 923, p. 16-pg., 2022-11-25. |
| Resumo | |
CaCu3Ti4O12: x% Ce (x = 0.00, 0.25, 0.50, 0.75, and 1.00) ceramic composites were prepared via solid-state reaction. Theoretical atomistic simulations were combined with experimental techniques to uncover Ce effects in the (micro)structure and photoluminescence of CaCu3Ti4O12-based ceramics. Application of perovskites ceramics in optoelectronics have been limited by their specific, narrow emission range, which compromise operational efficiency, pushing for the development of novel perovskite-emissive materials. This study results confirm that Ce ions are incorporated at Ca sites within the CaCu3Ti4O12 lattice, inducing point metal and oxygen vacancies in the optical bandgap region. Shallow-level defects (V-Ca/V-O ) were as-sociated with broadband violet-blue photoluminescent (PL) emissions. Better color rendering may be a direct consequence of crystalline field splitting/wider PL emission. Furthermore, results demonstrate that PL on CaCu3Ti4O12: Ce system intensity can be modulated by structural defects, making it promising for applications in optoelectronics. (C) 2022 Published by Elsevier B.V. (AU) | |
| Processo FAPESP: | 18/18236-4 - Desenvolvimento de cerâmicas avançadas à base de CaCu3Ti4O12 na forma de pós, bulks e filmes nanoestruturados: um estudo integrado das propriedades multifuncionais |
| Beneficiário: | Henrique Piccoli Moreno |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |