03 خرداد 1403
نادر قبادي

نادر قبادی

مرتبه علمی: دانشیار
نشانی:
تحصیلات: دکترای تخصصی / فیزیک-حالت جامد
تلفن:
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان
Optical band gap, photocatalysis, surface structures and depth profile properties of Cu2Se nanostructured thin films
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Cu2Se, nanostructure, optical band gap, urbach energy, photocatalytic
سال
2022
مجله Materials Research Express
پژوهشگران نادر قبادی

چکیده

The optical behaviour, stoichiometry, surface configuration of Cu2Se nanostructured thin layers prepared at different reaction times by the chemical process has been considered. The optical band gap of the deposited thin films decreases from 2.92 eV to 2.08 eV for the first transition and from 2.18 to 1.2 eV for the second transition. In addition, it was shown that Urbach energy is independent from the film thickness, and tail values of the localized states has decreased from 1.15 to 0.33 eV. It was found that the concentration of Cu: Se remains approximately constant across the depth of the deposited film at higher deposition time. The degradation efficiency of 98% was achieved by Congo red for the prepared Cu2Se thin film at optimal condition which make it a good candidate for organic dye. From these measurements and by controlling the band gap energy, the Cu2Se can find application in solar cell application