Study of π-conjugation effect of organic semiconductors on their optical parameters

Ahmad, Z. and Zafar, Q. and Touati, F. and Shakoor, R.A. (2016) Study of π-conjugation effect of organic semiconductors on their optical parameters. Optical Materials, 54. pp. 94-97. ISSN 0925-3467

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Official URL: https://doi.org/10.1016/j.optmat.2016.02.009

Abstract

Metal free organic semiconductor "7,16-bis(3,3-dimethyl-3H-indol-2-yl)-5,14-dihydrodibenzo [b,i][1,4,8,11] tetraazacyclotetradecine" and metal free with extended π-conjugation organic semiconductor "8,19-bis(3,3-dimethyl-3H-indol-2-yl)-6,17-dihydrodinaphthol [2,3-b:2′,3′-i][1,4,8,11] tetraazacyclotetradecine have been synthesized and the effect of conjugation on their photovoltaic parameters have been investigated. The photo-physical study reveals band gaps of 2.61 eV for metal free and 2.16 eV for extended material. The HOMO/LUMO levels of the materials are calculated using cyclic voltammetry (CV) study. The open circuit voltages of metal free and extended materials in single layer photovoltaic cells are observed to be 0.72 and 0.73 under simulated solar light illumination (air mass 1.5 G, 100 mW/cm2), respectively. The short circuit current in the extended materials is found to be more than ∼1.5 times higher the metal free material.

Item Type: Article
Uncontrolled Keywords: π-conjugation; Photovoltaic parameters; Cyclic voltammetry; HOMO/LUMO energy levels; Photoluminescence
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 07 Nov 2017 05:42
Last Modified: 07 Nov 2017 05:42
URI: http://eprints.um.edu.my/id/eprint/18137

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