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Improvement of photovoltaic conversion in sexithiophene-based photovoltaic cell with self-assembling dipole molecules

H. BEDIS OUERGHEMMI1,* , F. KOUKI1, H. BOUCHRIHA1, F. GARIER1

Affiliation

  1. UMAO, Faculté des Sciences de Tunis, Campus Universitaire, 2092 El-ManarI, Tunis, Tunisia

Abstract

In this paper, we study in the first the electrical and optical behaviours of organic photovoltaic cell based on thin film of sexithiophene (6T). We describe from current vs. applied voltage and impedance spectroscopy the mechanisms controlling conduction in this device. From absorption spectra, the action spectra and their modulation by Gosh model; we can evaluate motilities of generated photocarriers. In the second, we study the effect self-assembled dipole molecules (SAM) of benzoic acid on the photovoltaic behavior. From current-voltage characteristics after illumination we can estimate photovoltaic parameters of elaborated samples that shift according to orientation and the magnitude of dipole moment of molecule SAM. This Improvement involves a remarkable increase of the efficiency of these devices..

Keywords

Photovoltaïc cell, Sexithiophene, Dipole molecules, Photogeneration, Efficiency.

Submitted at: April 14, 2010
Accepted at: June 16, 2010

Citation

H. BEDIS OUERGHEMMI, F. KOUKI, H. BOUCHRIHA, F. GARIER, Improvement of photovoltaic conversion in sexithiophene-based photovoltaic cell with self-assembling dipole molecules, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 6, pp. 1360-1366 (2010)