optical analysis of Co-doped SnO2 nanostructured thin films by using spectroscopic ellipsometry technique

Publish Year: 1397
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

CMTS02_013

تاریخ نمایه سازی: 29 تیر 1398

Abstract:

Optical properties of sol-gel spin coated Co-doped SnO2 thin film deposited on the glass substrate was investigated by using spectroscopic ellipsometry (SE) technique. SE measurements are done at three various incidence angles of light including 67.5°, 70° and 72.5°. Influeces of the incidence angle of light emitted by SE device on optical constants including the reflectance, refractive index, extinction and absorption coefficents were studied. By absorption coefficient values obtained from SE measurements and using Tauc equation, we determined the band gap energy values. Results showed the increase of incidence angle of light from 67.5° to 72.5° leads to decrease of the bandgap energy from 3.5 to 3.4 ev.

Authors

Sahar Moradi

Department of Physics, Faculty of Science, Urmia University, Urmia, Iran.

Hassan Sedghi

Department of Physics, Faculty of Science, Urmia University, Urmia, Iran.

Jamshid Asadi

Department of Physics, Faculty of Science, Urmia University, Urmia, Iran.