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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Unraveling the Photoluminescence Properties of the Sr10V6O25 Structure through Experimental and Theoretical Analyses

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Teixeira, Mayara Mondego [1] ; Gouveia, Amanda Fernandes [2] ; de Sousa, Alexsandro Gama [3] ; da Silva, Luis Fernando [4] ; de Oliveira, Regiane Cristina [5] ; San-Miguel, Miguel A. [2] ; Li, Maximo Siu [6] ; Longo, Elson [1]
Total Authors: 8
[1] Univ Fed Sao Carlos, CDMF UFSCar, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Estadual Campinas, Inst Chem, BR-13083970 Campinas, SP - Brazil
[3] Univ Estadual Sudeste Bahia, UESB, BR-45700000 Itapetinga, BA - Brazil
[4] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil
[5] Univ Estadual Paulista, Fac Ciencias, Grp Modelagem & Simulacoes Mol, BR-17033360 Bauru, SP - Brazil
[6] IFSC Univ Sao Paulo, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 6
Document type: Journal article
Source: Journal of Physical Chemistry C; v. 124, n. 27, p. 14446-14458, JUL 9 2020.
Web of Science Citations: 0

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)

FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 16/23891-6 - Computer modeling of condensed matter
Grantee:Alex Antonelli
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 19/01732-1 - Photocatalytic activity of multifunctional semiconductors: influence of morphology and electron injection
Grantee:Amanda Fernandes Gouveia
Support Opportunities: Scholarships in Brazil - Post-Doctorate