Optical characterization of electron beam evaporated chloroindium phthalocyanine thin films
| Autor: | Salar Pourteimoor, M.E. Azim-Araghi |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Absorption spectroscopy business.industry Band gap Analytical chemistry Condensed Matter Physics Electron beam physical vapor deposition Atomic and Molecular Physics and Optics Molecular electronic transition Electronic Optical and Magnetic Materials Absorption edge Transmittance Optoelectronics Electrical and Electronic Engineering Thin film business Absorption (electromagnetic radiation) |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 24:5132-5139 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-013-1535-1 |
| Popis: | In present study, the optical properties of chloroindium phthalocyanine (ClInPc) thin films prepared by electron beam evaporation have been investigated. The optical characteristics of the prepared thin films have been determined using spectrophotometric measurements of the absorbance, transmittance and reflectance at normal incidence in the spectral range 300–1,100 nm. Surface morphology of thin films is studied using field emission scanning electron microscopy. The absorption spectra recorded in UV-Visible region for the deposited films show two well defined intense absorption bands of phthalocyanine molecule; namely the Q-band and the Soret (B-band). The analysis of the spectral behavior of the absorption coefficient in the intrinsic absorption region have been performed to determine the optical band gap energy and type of the electronic transition, which reveals the probability of direct and indirect transitions. Moreover, by studying the absorption coefficient spectra just below the fundamental absorption edge, the width of band tails of localized states (Urbach energy), steepness parameter and width of the defect states have been evaluated. The obtained results of this novel grown ClInPc thin films support the desirable feature for the optoelectronic devices. |
| Databáze: | OpenAIRE |
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