PENENTUAN CELAH PITA ENERGI  FILM TIPIS BARIUM STRONSIUM TITANAT (Ba1-xSrxTiO3) UNTUK  x= 0,4 ; 0,5 DAN 0,6

Rahmi Dewi; Krisman Krisman; Taufiq Hidayat

doi:10.21009/0305020220

Rahmi Dewi Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Riau Kampus Bina Widya Pekanbaru, 28293, Indonesia
Krisman Krisman Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Riau Kampus Bina Widya Pekanbaru, 28293, Indonesia
Taufiq Hidayat Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Riau Kampus Bina Widya Pekanbaru, 28293, Indonesia

DOI: https://doi.org/10.21009/0305020220

Abstract

Barium Strontium Titanate (BST) thin film on the substrate glass was successfully fabricated by using sol-gel method. The purpose of this research is to obtain optical energy band gap value by adopting Tauc plot method with various composition and temperature. Obtaining of such information could be through identifying the degree of absorbance, degree of transmittance, the extent of refractive index, the usage of thin film and its quantified coefficients. Subsequently, the optical properties of thin film are characterized by using Ultraviolet-Visible Spectrophotometer with a thin film of Ba_1-_xSr_xTiO₃ subjected to temperatures of 650ÂºC. Upon subjected to temperature stated above, the wide energy band gap optical thin film Ba_0,6Sr_0,4TiO₃ is in the range of 2.0 eV for Ba_0,5Sr_0,5TiO₃ is in the range of 1.55 eV and for Ba_0,4Sr_0,6TiO₃ is in the range of 2.0 eV.

Keywords: Thin Film BST, Composition, Temperature, Energy Band Gap.