Title :
The dependence of optical properties on composition in BFO-PT thin films
Author :
Zhou, Xiaowen ; Yu, Shengwen ; Cheng, Jinrong
Author_Institution :
Sch. of Mater. Sci. & Eng., Shanghai Univ., Shanghai, China
Abstract :
It has been found that bismuth ferrite (BiFeO3, BFO) is not only a promising multiferroic material but also shows optical response in visible wavelength. This enables BFO a probable application in optoelectronic device with visible light source. However, the high leakage current in BFO greatly impedes its practical application. BiFeO3-PbTiO3 (BFO-PT), the derivative of BFO, has been proved exhibiting improved insulation. We have reported that the band gap of 0.7BFO-0.3PT thin film also locates in the visible green light. Nevertheless, the dependence of optical properties on composition in BFO-PT thin films is few documented. In this work, the electrical properties and optical response of xBFO-(1-x)PT (0.1 ≤ x ≤ 0.9) thin films are carefully examined and the band gap of the films are analyzed. The effect of composition on phase structure, electrical and optical properties in BFO-PT films will be investigated.
Keywords :
absorption coefficients; bismuth compounds; energy gap; ferroelectric thin films; lead compounds; leakage currents; ultraviolet spectra; visible spectra; BiFeO3-PbTiO3; electrical properties; leakage current; optical band gap; optical properties; phase structure; thin films; Absorption; Lattices; Optical device fabrication; Optical films; Optical polarization; Photonic band gap; BiFeO3-PbTiO3; optical band gap; thin film;
Conference_Titel :
Applications of Ferroelectrics (ISAF), 2010 IEEE International Symposium on the
Conference_Location :
Edinburgh
Print_ISBN :
978-1-4244-8190-3
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2010.5712270
