| Texto completo | |
| Autor(es): |
Teixeira, Mayara Mondego
;
Gouveia, Amanda Fernandes
;
de Sousa, Alexsandro Gama
;
da Silva, Luis Fernando
;
de Oliveira, Regiane Cristina
;
San-Miguel, Miguel A.
;
Li, Maximo Siu
;
Longo, Elson
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Physical Chemistry C; v. 124, n. 27, p. 13-pg., 2020-07-09. |
| Resumo | |
White light photoluminescent materials can overcome many problems due to an intrinsic color balance, in addition to reducing the cost for application in emitting components and electronic devices. In this sense, to observe this phenomenon of photoluminescence, variations in the synthesis time at low temperatures were carried out, which also influenced the degree of structural order/disorder of strontium vanadate (Sr10V6O2.5, SVO). The microwave-assisted hydrothermal route allowed us to evaluate the structural and morphological evolution of the SVO compound. Furthermore, this paper discusses how van der Waals forces influence the morphological evolution of a semiconductor as a function of orientation, induction, and dispersion interactions. The experimental study combined with theoretical approaches provided information about the structure and electronic properties of SVO. From the experimental data and theoretical analysis, we propose, for the first time, that the unit cell of the SVO structure is composed of three distorted [SrOx] (x = 6, 7, and 9) and two distorted [VO4] clusters. Photoluminescence measurements revealed an efficient broadband emission, and the conversion of ultraviolet light excitation into visible light was observed. The emission chromaticity showed that the structural disorders of the [SrOx] and [VO4] clusters present the possibility of change in the Commission Internationale de l'Eclairage emission color. (AU) | |
| Processo FAPESP: | 19/01732-1 - Atividade fotocatalítica de semicondutores multifuncionais: influência da morfologia e injeção de elétrons |
| Beneficiário: | Amanda Fernandes Gouveia |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 16/23891-6 - Modelagem computacional da matéria condensada |
| Beneficiário: | Alex Antonelli |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais |
| Beneficiário: | Elson Longo da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |