Structural and optical properties of Ba(Ti1−x,Nix)O3 thin films prepared by sol–gel process

✍ Scribed by Juntao Yang; Ting Zhang; Manman Ni; Linghong Ding; W.F. Zhang

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 265 KB
• Volume: 256
• Category: Article
• ISSN: 0169-4332
• DOI: 10.1016/j.apsusc.2009.04.168

✦ Synopsis

Sol-gel method

A B S T R A C T Ba(Ti 1Àx ,Ni x )O 3 thin films were prepared on fused quartz substrates by a sol-gel process. X-ray diffraction and Raman scattering measurements showed that the films are of pseudo-cubic perovskite structure with random orientation and the change of lattice constant caused by Ni-doping with different concentrations is very small. Optical transmittance spectra indicated that Ni-doping has an obvious effect on the energy band structure. The energy gap of Ba(Ti 1Àx ,Ni x )O 3 decreased linearly with the increase of Ni concentration. It indicates that the adjusting of band gap can be achieved by controlling the Ni-doping content accurately in Ba(Ti 1Àx ,Ni x )O 3 thin films. This has potential application in devices based on ferroelectric thin films.