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Dopage par co-sublimation de semi-conducteurs organiques pour la conversion en énergie : Applications aux cellules photovoltaïques

Abstract : Despite the potential advantages of the organic electronic devices such as flexibility and inexpensive manufacturing processes, they require improvements in terms of performance and lifetime. In this context, engineering interfaces plays an important role and doping, which allows the controlled position of the Fermi level and which has significantly contributed to the success of inorganic semiconductors, is a technique deserving to be explored.This work therefore describes the analysis of doped organic semiconductors deposited by co-sublimation in vacuum to improve the charge extraction and transport in electronic devices and more particularly in organic photovoltaic cells (OPV). The change in electrical conductivity, Seebeck coefficient and morphology is discussed for both p and n-type doping of different materials, before being used as interface layers in OPV cells. In most cases, the introduction of these interface layers has improved contact at organic / electrode interfaces and has enhanced the selectivity of the contacts which has reduced the voltage drops. State-of-the-art efficiencies could then be obtained by inserting some of these doped layers in solar cells based on P3HT: PCBM.Moreover, following the recent interest of the scientific community for organic thermoelectricity whose optimization requires the control of the doping level, these doped layers were also studied and considered to develop a prototype of a planar thermoelectric device.
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https://tel.archives-ouvertes.fr/tel-01144133
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  • HAL Id : tel-01144133, version 1

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Anthony Barbot. Dopage par co-sublimation de semi-conducteurs organiques pour la conversion en énergie : Applications aux cellules photovoltaïques. Electronique. Université de Limoges, 2014. Français. ⟨NNT : 2014LIMO0020⟩. ⟨tel-01144133⟩

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