Comparison study between the effect of (He-Ne) laser irradiation and heat treatment on the optical properties of dichromium trioxide thin film
Other Title(s)
دراسة مقارنة بين تأثير التشعيع بوساطة ليزر (الهليوم- نيون) و تأثير المعاملة الحرارية في الخواص البصرية لغشاء Cr2O3 الرقيق
Joint Authors
Dahham, Najat Ahmad
al-Rawi, Ahmad Khalil
Muhammad, Ghusun Hamid
Source
Ibn al-Haitham Journal for Pure and Applied Science
Issue
Vol. 23, Issue 3 (31 Dec. 2010)10 p.
Publisher
University of Baghdad College of Education for Pure Science / Ibn al-Haitham
Publication Date
2010-12-31
Country of Publication
Iraq
No. of Pages
10
Main Subjects
Topics
Abstract EN
In this study, we investigate the effect of (He-Ne) laser irradiation for half hour and heat treatment (annealing) at 450oC for 2 hours on the optical properties of dichromium trioxide Cr2O3 thin films, prepared on glass slides by chemical spray pyrolysis at 400oC with spraying rate (1 ml / min) and (0.19 ± 0.05) µm thickness.
The optical characteristics of the prepared thin films have been investigated by UV/ VIS spectrophotometer in the wavelength range (300–900) nm.
Optical properties such as absorption coefficient (α), optical band gap (Eg), extinction coefficient (k), refractive index (n), and complex dielectric constants (€1 and €2) were evaluated from the absorptance and transmittance spectra.
All the films were found to exhibit allowed electronic transition (α >104 cm-1).
The absorption edge shifted toward the longer wavelength (red shift) after irradiation, leading to decrease the optical band gap (Eg) from 3.13 eV for untreated film to 2.97eV for the irradiated film, while Eg was increased to 3.22 eV for the annealed film, indicating (blue shift).
It was realized that localized states width (Et) for untreated film was increased from 0.47 eV to 0.56 eV after irradiation, and decreased to 0.41 eV after annealing.
American Psychological Association (APA)
Dahham, Najat Ahmad& al-Rawi, Ahmad Khalil& Muhammad, Ghusun Hamid. 2010. Comparison study between the effect of (He-Ne) laser irradiation and heat treatment on the optical properties of dichromium trioxide thin film. Ibn al-Haitham Journal for Pure and Applied Science،Vol. 23, no. 3.
https://search.emarefa.net/detail/BIM-287582
Modern Language Association (MLA)
al-Rawi, Ahmad Khalil…[et al.]. Comparison study between the effect of (He-Ne) laser irradiation and heat treatment on the optical properties of dichromium trioxide thin film. Ibn al-Haitham Journal for Pure and Applied Science Vol. 23, no. 3 (2010).
https://search.emarefa.net/detail/BIM-287582
American Medical Association (AMA)
Dahham, Najat Ahmad& al-Rawi, Ahmad Khalil& Muhammad, Ghusun Hamid. Comparison study between the effect of (He-Ne) laser irradiation and heat treatment on the optical properties of dichromium trioxide thin film. Ibn al-Haitham Journal for Pure and Applied Science. 2010. Vol. 23, no. 3.
https://search.emarefa.net/detail/BIM-287582
Data Type
Journal Articles
Language
English
Notes
Includes appendix.
Record ID
BIM-287582