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Exploration de procédés tout-ALD via la synthèse de couches minces à base de sulfures et d’oxydes pour l’élaboration de cellules photovoltaïques de type CIGS.

Abstract : The goal of this doctoral research project is to use the advantages of the ALD (Atomic Layer Deposition) technique for the synthesis of innovative materials to be used in the future generations of CIGS thin film solar cells. ALD technique allows the deposition in smooth conditions (low temperature, mbar pressure level) of conformal and uniform films, with a high control of the thickness at the atomic layer scale. Due its unique features, it is now widely applied in the field of microelectronics. In photovoltaics, the need to control at smaller scale and more accurately the thickness and the interfaces of the films implies a wide development of ALD in the next years. The main focus of this project is the synthesis of new materials with a fine interface engineering that will be integrated in CIGS devices and allows the elaboration of all-ALD solar cell. The doctoral candidate will pilot a new ALD reactor, and use its new functionalities to synthesize materials from innovative chemical precursors. In parallel, a second ALD reactor equipped with a plasma module will give access to other reactivities and allow further optimization of the interfaces. Understanding the reaction mechanisms involved via in-situ studies (for which two new analytical tools will be implemented by the student during the project) and materials characterization (XRD, SEM/EDX, optical transmission ...) will be compulsory for the success of this project. Finally, those materials will be integrated in CIGS devices, and tested to validate new concepts and allow the development of more efficient photovoltaic devices with reduced cost of atoms. In addition to this, they will be the building blocks of a first all-ALD solar cell.
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Harold Le Tulzo. Exploration de procédés tout-ALD via la synthèse de couches minces à base de sulfures et d’oxydes pour l’élaboration de cellules photovoltaïques de type CIGS.. Matériaux. Université Paris sciences et lettres, 2018. Français. ⟨NNT : 2018PSLEC011⟩. ⟨tel-02860685⟩

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