"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Light absorption in meta-dinitrobenzene and benzyl crystalline films

F. STANCULESCU1, A. STANCULESCU2,* , M. SOCOL2

Affiliation

  1. Faculty of Physics, University of Bucharest, P.O. Box MG-11 Bucharest-Magurele, Romania
  2. National Institute for Materials Physics, P.O. Box MG 7 Bucharest-Magurele, Romania

Abstract

This paper presents the optical absorption properties in crystalline meta-dinitrobenzene (m-DNB) and benzil. The optical band gap as an intrinsic property of these crystalline compounds has been studied using UV-VIS Spectroscopy on thin film. Analysing absorption near the fundamental absorption edge we have deduced the wide band gap semiconductor behaviour of these aromatic derivatives. Processing the experimental transmission data using a function obtained by the superposition of a linear function and a power function we have evaluated the band gap energy in m-DNB, Eg=2.90 eV and emphasised the same two edges patterns of the light absorption spectrum in benzil deposited on glass as for benzil deposited on quartz, with energetic thresholds slowly moved through lower energies, Eg1=2.79 eV and Eg2=3.49 eV. We have also remarked no significant change in the absorption spectrum in benzil induced by the dopant (organic and inorganic)..

Keywords

Organic compounds, Crystalline film, Light absorption.

Submitted at: March 15, 2006
Accepted at: May 18, 2006

Citation

F. STANCULESCU, A. STANCULESCU, M. SOCOL, Light absorption in meta-dinitrobenzene and benzyl crystalline films, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 3, pp. 1053-1056 (2006)