Electrosteric colloidal stabilization for obtaining SrTiO3/TiO2 heterojunction: Microstructural evolution in the interface and photonics properties

Autor(es)

Amoresi, Rafael A. C. ^[1] ; Teodoro, Vinicius ^[2] ; Teixeira, Guilhermina F. ^[1] ; Li, Maximo S. ^[3] ; Simoes, Alexandre Z. ^[4] ; Perazolli, Leinig A. ^[1] ; Longo, Elson ^{[1, 2]} ; Zaghete, Maria A. ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, LIEC Chem Inst, Interdisciplinary Lab Electrochem & Ceram, BR-14800060 Araraquara, SP - Brazil

^[2] Univ Fed Sao Carlos UFSCAR, LIEC Dept Chem, Interdisciplinary Lab Electrochem & Ceram, BR-13565905 Sao Carlos, SP - Brazil

^[3] Univ Sao Paulo, Inst Phys Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

^[4] Sao Paulo State Univ UNESP, Fac Engn Guaratingueta, BR-12516410 Guaratingueta, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the European Ceramic Society; v. 38, n. 4, p. 1621-1631, APR 2018.
• Citações Web of Science: 6

Resumo

Researches on solids heterojunctions has proven to be an important field for technological applications due to synergism achieved by interface phenomena. In this work, we present an understanding of SrTiO3/TiO2 interface and its effects on structural and microstructural characteristics, and relate them to photoluminescence properties of heterojunctions obtained by a simple method. It was observed that SrTiO3 proportion directly influences the structural order-disorder, as observed by X-Ray diffraction, Raman spectroscopy and Transmission electron microscopy. Photoluminescence behavior of heterojunction with 1% of SrTiO3 showed a shift to blue emission region compared to TiO2, and enhanced of emission intensity compared to SrTiO3, resulted from defects generated by interface effects, attracting possible applications on selective color emitter. Therefore, we conclude that in same materials phases, nature and concentration of structural defects has strong dependence of SrTiO3 concentration, which leads to different photoluminescence properties. (AU)

• 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