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

Authors M.D. Jeroh, A.J. Ekpunobi , D.N. Okoli

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

Е-mail jeruaye@gmail.com
Issue Volume 10, Year 2018, Number 3
Dates Received 27 February 2018; revised manuscript received 07 June 2018; published online 25 June 2018
Citation 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
Keywords Photon Energy, Optical Constants (10) , Band gap (29) , Substrate temperature (2) , Blue-shift, Electromagnetic spectrum.

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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