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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.)

Controlling the Electronic, Structural, and Optical Properties of Novel MgTiO3/LaNiO3 Nanostructured Films for Enhanced Optoelectronic Devices

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Mazzo, T. M. [1] ; Macario, L. R. [2] ; Gorup, L. F. [3] ; Bouquet, V [4] ; Deputier, S. [4] ; Ollivier, S. [4] ; Guilloux-Viry, M. [4] ; Albuquerque, A. R. [5] ; Sambrano, J. R. [6] ; La Porta, F. A. [7] ; Longo, E. [2]
Total Authors: 11
[1] Fed Univ Sao Paulo UNIFESP, Inst Marine Sci, POB 11070-100, BR-11015020 Santos, SP - Brazil
[2] Univ Fed Sao Carlos UFSCar, CDMF, INCTMN, Rod Washington Luis Km 235, CP 676, BR-13565905 Sao Carlos, SP - Brazil
[3] Fed Univ Grande Dourados, Dept Chem, FACET, BR-79804970 Dourados, MS - Brazil
[4] Univ Rennes, UMR 6226, CNRS, Inst Sci Chim Rennes, Campus Beaulieu, F-35042 Rennes - France
[5] Univ Fed Rio Grande do Norte UFRN, Inst Quim, BR-59078970 Natal, RN - Brazil
[6] Sao Paulo State Univ UNESP, Modeling & Mol Simulat Grp, BR-17033360 Bauru, SP - Brazil
[7] Fed Technol Univ Parana UTFPR, Lab Nanotechnol & Computat Chem, BR-86036370 Londrina, Parana - Brazil
Total Affiliations: 7
Document type: Journal article
Source: ACS APPLIED NANO MATERIALS; v. 2, n. 5, p. 2612-2620, MAY 2019.
Web of Science Citations: 0

This study systematically investigated the electronic, structural, and optical properties of MgTiO3 (MTO), LaNiO3 (LNO), and MgTiO3/LaNiO3 (MTO/LNO) nanostructured films grown on Si(100) substrates by the pulsed laser deposition method. The structural characterizations obtained by X-ray diffraction revealed a preferred (003) orientation for the MTO film, while the LNO film was polycrystalline. The diffraction peaks corresponded to a rhombohedral structure, which was confirmed by micro-Raman spectroscopy for both nanostructured films. The MTO/LNO heterostructure was polycrystalline and exhibited the diffraction peaks of both the MTO and the LNO phases. Additionally, the results revealed that the LNO films did not have a significant photoluminescence (PL) emission, while an intense broad infrared luminescence centered at 724 nm appeared for the MTO nanostructured film. Surprisingly, for the MTO/LNO heterostructure, the PL emission profile exhibited a dual-color emission with an intense broad luminescence in the blue region (maximum centered at 454 nm) and an intense near-infrared emission (maximum centered at 754 nm), respectively, mainly because of the effect of interface defects, which induced a significant change in the PL behavior. Therefore, our experimental results correlated with the theoretical simulations based on the periodic density functional theory formalism and contributed to a deeper understanding of the charge/energy transfer processes occurring in the MTO/LNO/Si interfaces, and toward the exploitation of the close relationship between the structure and properties of these new functional materials. (AU)

FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC