Loading...
Search for:
ellipsometery
0.081 seconds
BiFeO3 Thin Films Deposition by Sol-Gel and Dip Coating Process
, M.Sc. Thesis Sharif University of Technology ; Nemati, Ali (Supervisor) ; Alizadeh, Masoud (Supervisor)
Abstract
Dark and light conductivity has been investigated in Ca-doped bismuth ferrite thin films. Higher conductivity in the order of 105 magnitude of pure Bismuth ferrite has been observed for Bi0.85Ca0.15FeO3-δ. Structural analysis using Rietveld refinement showed a deviation from volume reduction for Bi0.85Ca0.15FeO3-δ that could be the reason of the abnormally high conductivity for this compound. Although higher calcium doping reduced conductivity but photoresponse could be revived. Atomic Forec Microscopy investigations showed that surface roughness decreases with increasing calcium concentration. Enhanced photoconductivity is reported for Bi0.7Ca0.3FeO3-δ with ~2.9 eV direct optical band gap...