LaNiO3/BaTiO3/KNbO3 thin films obtained from Si substrate to study structural and optical properties

• Grant number: 12/11173-0
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: September 01, 2012
• End date: November 30, 2012
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Elson Longo da Silva
• Grantee: Leilane Roberta Macario
• Supervisor: Valérie Bouquet
• Host Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Institution abroad: Université de Rennes 1, France
• Associated to the scholarship: 10/08453-6 - Preparation and characterization of polymer/ceramic composite of polyvinylidene fluoride with perovskite compounds doped with europium for multifunctional sensor applications., BP.DR

Abstract

This work proposes studies to obtain ceramic powders for subsequent deposition in multilayer thin films in order to obtain thin films with relevant optical properties. The ceramic powders to be used in the thin films production will be produced via conventional method of solid state reaction (SSR). The thin films will be performed by the Pulsed Laser Deposition method (PLD). The attainment of the multilayer films occurs through three stages, depositing a lanthanum nickelate layer (LaNiO3) on a Si substrate (100); deposition a barium titanate layer (BaTiO3) on the LaNiO3 layer, and deposition a potassium niobate layer (KNbO3) on BaTiO3 layer. The films structures will be investigated by the X-ray diffraction technique. A morphological study will be carried out using Scanning Electron Microscopy (SEM), allowing homogeneity and thickness of the films prepared. The optical property of the resulting thin film will be studied through photoluminescence emission (PL) measurements. The results will be correlated from PL emissions and structural and morphological properties of thin films. (AU)