کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7223019 | 1470555 | 2018 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of growth temperatures on the surface morphology, optical analysis, dielectric constants, electric susceptibility, Urbach and bandgap energy of sprayed NiO thin films
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Thin films of nickel oxide (NiO) were deposited on glass substrates at a different temperature of growth using spray pyrolysis. Optical properties were examined using spectral measurement at a wavelength range of 300-2500ânm. Optical constants (n and k) were calculated from corrected transmittance and correct reflection. The data obtained show that the direct transition (Eg) decreased from 3.738 to 3.146âeV and the change in indirect transmission from 2.790 to 2.049âeV with increasing temperature. On the contrary, it was found that the Urbach energy (band tail width), the EU has decreased from 0.184 to 0.104âeV. This behavior is believed to be associated with increased growth temperature. Optical conductivity, reflectivity, dielectric constants, volume and surface energy loss functions, electrical susceptibility and relaxation time were discussed as functions for growth temperatures. Of these results, NiO films were rated as an excellent material for optoelectronic applications and a potential candidate for solar cell applications due to their ability to improve.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optik - Volume 172, November 2018, Pages 783-793
Journal: Optik - Volume 172, November 2018, Pages 783-793
نویسندگان
Alaa A. Akl, Safwat A. Mahmoud,