optical analysis of Co-doped SnO2 nanostructured thin films by using spectroscopic ellipsometry technique
محل انتشار: دومین کنفرانس بین المللی فناوری های نوین در علوم
سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 435
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شناسه ملی سند علمی:
CMTS02_013
تاریخ نمایه سازی: 29 تیر 1398
چکیده مقاله:
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.
کلیدواژه ها:
نویسندگان
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.