Correlation between crystallite size–optical gap energy and precursor molarities of ZnO thin films

2014 ◽  
Vol 35 (4) ◽  
pp. 042001 ◽  
Author(s):  
S. Benramache ◽  
O. Belahssen ◽  
A. Guettaf ◽  
A. Arif
Keyword(s):  
Thin Films ◽  
Crystallite Size ◽  
Zno Thin Films ◽  
Gap Energy ◽  
Optical Gap ◽  
Optical Gap Energy

scholarly journals A Comparative Study the Calculation of the Optical Gap Energy and Urbach Energy in Undoped and Indium Doped ZnO Thin Films

2016 ◽  
Vol 8 (1) ◽  
pp. 01008-1-01008-5
Author(s):  
Said Benramache ◽  
◽  
Boubaker Benhaoua ◽  
Okba Belahssen ◽  
◽  
...  
Keyword(s):  
Thin Films ◽  
Comparative Study ◽  
Urbach Energy ◽  
Zno Thin Films ◽  
Gap Energy ◽  
Optical Gap ◽  
Optical Gap Energy ◽  
Doped Zno

scholarly journals The calculation of the optical gap energy of ZnXO (X = Bi, Sn and Fe)

Open Physics ◽  
2016 ◽  
Vol 14 (1) ◽  
pp. 714-720 ◽  
Author(s):  
Said Benramache ◽  
Boubaker Benhaoua
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Spray Deposition ◽  
Band Gap Energy ◽  
Zno Thin Films ◽  
Zno Films ◽  
Gap Energy ◽  
Optical Gap ◽  
Optical Gap Energy ◽  
Doped Zno

AbstractIn this paper, a new mathematical model has been developed to calculate the optical properties of nano materials a function of their size and structure. ZnO has good characterizatics in optical, electrical, and structural crystallisation; We will demonstrate that the direct optical gap energy of ZnO films grown by US and SP spray deposition can be calculated by investigating the correlation between solution molarity, doping levels of doped films and their Urbache energy. A simulation model has been developed to calculate the optical band gap energy of undoped and Bi, Sn and Fe doped ZnO thin films. The measurements by thus proposed models are in agreement with experimental data, with high correlation coefficients in the range 0.94-0.99. The maximum calculated enhancement of the optical gap energy of Sn doped ZnO thin films is always higher than the enhancement attainable with an Fe doped film, where the minimum error was found for Bi and Sn doped ZnO thin films to be 2,345 and 3,072%, respectively. The decrease in the relative errors from undoped to doped films can be explained by the good optical properties which can be observed in the fewer number of defects as well as less disorder.

Effect of optical gap energy on the Urbach energy in the undoped ZnO thin films

Optik ◽  
2015 ◽  
Vol 126 (15-16) ◽  
pp. 1487-1490 ◽  
Author(s):  
Okba Belahssen ◽  
Hachemi Ben Temam ◽  
Said Lakel ◽  
Boubaker Benhaoua ◽  
Said Benramache ◽  
...  
Keyword(s):  
Thin Films ◽  
Urbach Energy ◽  
Zno Thin Films ◽  
Gap Energy ◽  
Optical Gap ◽  
Optical Gap Energy

scholarly journals The calculate of optical gap energy and urbach energy of Ni1−xCoxO thin films

Sadhana ◽  
2019 ◽  
Vol 44 (1) ◽  
Author(s):  
Said Benramache ◽  
Yacine Aoun ◽  
Said Lakel ◽  
Boubaker Benhaoua ◽  
Chahrazed Torchi
Keyword(s):  
Thin Films ◽  
Urbach Energy ◽  
Gap Energy ◽  
Optical Gap ◽  
Optical Gap Energy

scholarly journals Influence of zinc ion concentration on structure, morphology and optical properties of spray deposited ZnO thin films

2021 ◽  
Vol 10 (3) ◽  
pp. 198
Author(s):  
Sarika Vishvnbath Jadhav ◽  
Limbraj Sopan Ravangave
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Crystallite Size ◽  
Zinc Acetate ◽  
Zinc Ion ◽  
Ion Concentration ◽  
Zno Thin Films ◽  
Electromagnetic Spectrum ◽  
Structure Morphology ◽  
Wide Range

<p>Zinc Oxide (ZnO) thin films were deposited for five different molarity (M) of Zinc acetate hydrated (0.075, 0.1, 0.125, 0.15, 0.175 M) using simple spray technique to study the effect of zinc ion concentration on structure, morphology and optical properties. The XRD patterns of deposited ZnO thin films show hexagonal crystal structure with wurtzite symmetry. The effect of molarity on morphology was studied using scanning electron microscopy (SEM). The elemental analysis was studied by using energy dispersive X-ray analysis (EDX). The optical absorption was recorded by using systronics double beam spectrophotometer (2201). Crystallite size estimated from XRD data was in nanometre (nm) range; however, films deposited for 0.15 M zinc acetate show maximum crystallite size (66 nm) as compared to other samples. All the films show low absorption in wide range (340-999 nm) of electromagnetic spectrum. However, ZnO film deposited for 0.15 zinc acetate hydrated shows maximum blue shifting of absorption edge and higher band gap (3.8 eV) as compared to other samples.</p>

Preparation and Properties of Hydrogen Ated Amorphous Germanium Nitride a-GeNx:H

1997 ◽  
Vol 467 ◽  
Author(s):  
M. Hioki ◽  
S. Nitta ◽  
Y. Takeda ◽  
K. Yamamoto ◽  
M. Sasaki ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Outer Edge ◽  
Optical Absorption Coefficient ◽  
Gap Energy ◽  
Optical Gap ◽  
Light Yellow ◽  
Carbon Impurities ◽  
Optical Gap Energy ◽  
The Magnetic Field ◽  
Content Of Oxygen

ABSTRACTThe properties of a-GeNx:H films have been studied including the effects of oxygen and carbon impurities. The contamination of a-GeNx:H with oxygen and carbon is expressed as a-GeNx(OyCz):H, where x=N/Ge, y=O/Ge and z=C/Ge. The characteristics of a-GeNx(OyCz):H are summarized as follows: the sample is transparent at the center of a film, and the color of a film varies to light yellow and to brown at the outer edge depending on the magnetic field of the magnetron sputtering. The compositional ratios of the film vary from x=0.34 to 0.28, y=0.15 to 0.25 and z=0.05 to 0.02 at the center and at outer edge of a film, respectively. Optical gap energy EO5, obtained by the photon energy at optical absorption coefficient of 5×103 cm−1, are 2.9 eV at the center and 1.7 eV at the outer edge of a film. Eo5 increases with the nitrogen content x in a-GeNx(OyCz):H but is independent of the content of oxygen and carbon.

Sign in / Sign up

Export Citation Format

Share Document