Optical Analytical Studies of Electrostatic-Sprayed Eu-doped Cadmium Selenide Nanofilms at Different Temperatures

Автори M.D. Jeroh, A.J. Ekpunobi , D.N. Okoli
Приналежність

Department of Physics and Industrial Physics, Nnamdi Azikiwe University, Awka, Nigeria

Е-mail jeruaye@gmail.com
Випуск Том 10, Рік 2018, Номер 3
Дати Одержано 27.02.2018; у відредагованій формі 07.06.2018; опубліковано online 25.06.2018
Посилання M.D. Jeroh, A.J. Ekpunobi, D.N. Okoli, J. Nano- Electron. Phys. 10 No 3, 03006 (2018)
DOI https://doi.org/10.21272/jnep.10(3).03006
PACS Number(s) 78.20.Ci, 78.40.Fy, 78.66.Hf
Ключові слова Photon Energy, Optical Constants (10) , Band gap (29) , Substrate temperature (2) , Blue-shift, Electromagnetic spectrum.
Анотація

Electrostatic spray pyrolysis was utilized to grow nanofilms of Eu-doped cadmium selenide at different temperatures. Optical analysis performed on the grown films reveals extremely poor reflection and absorption of light throughout the visible spectrum. However, high transmission was determined at higher wavelengths (visible spectrum) for the films. Other optical constants such as absorption coefficient, optical conductivity, refractive index, extinction coefficient, dielectric constants (imaginary and real), sum of both dielectric constants (imaginary and real) are analyzed. Optical band gap studies disclosed the band gaps of CdSe:Eu films were blue-shifted from CdSe bulk value (1.75 eV); from 2.4 eV to 2.84 eV.

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