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CELLULES PHOTOVOLTAÏQUES ORGANIQUES DÉRIVÉES DE NOUVEAUX SYSTÈMES CONJUGUÉS

Abstract : Photovoltaic cells based on organic semi-conductors are a focus of increasing research effort
motivated by the possibility to realize large area, light-weight and low-cost flexible solar cells taking
advantage of the processability of organic materials. Besides environmental constraints and the
predictable exhausting of fossil energy resources, the strong renewal of interest for organic PV
conversion has been boosted by the large improvement of the conversion efficiency of organic solar
cells accomplished in recent years.
The first part of this work consisted in elaborating a reliable experimental protocol allowing the
evaluation of new organic semiconducting materials donors and acceptors intended for the realization
of solar cells of type heterojunction.. The realization of cells based on copper phthalocyanin (CuPc)
and of C60, besides already described in the literature, allowed us to validate a set of protocols of
elaboration and characterization of the cells.
These procedures were then applied to the evaluation of a series of acceptors derived of
perylene in cells containing the CuPc as the donor. This second stage allowed us to select two
compounds as model acceptors whom we used for the suite of this work.
The third and last part of this work concerned the realization of heterojunctions base on new
hybrid conjugated oligomeres derived of three basic structures: terthiophene, quaterthiophene, and
quinquethiophene. We've first tried to establish correlations between the chemical structure of the
donors and some of the electric characteristics of the cells. Finally, the experiences of this systematic
study contributed to the conception and to the synthesis of new star shaped oligothiophenes acting as
donor, by means of whom we were able to realize solar cells which appear among the most effective
obtained until now from oligo- and from polythiophenes.
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Submitted on : Thursday, November 9, 2006 - 7:54:50 PM
Last modification on : Friday, May 10, 2019 - 1:02:02 PM
Long-term archiving on: : Tuesday, April 6, 2010 - 10:06:35 PM

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  • HAL Id : tel-00112847, version 1

Citation

Rémi de Bettignies. CELLULES PHOTOVOLTAÏQUES ORGANIQUES DÉRIVÉES DE NOUVEAUX SYSTÈMES CONJUGUÉS. Micro et nanotechnologies/Microélectronique. Université d'Angers, 2003. Français. ⟨tel-00112847⟩

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