Etude de l'utilisation du ZnO comme contact de type n dans des dispositifs photovoltaïques à base de pérovskite hybride

Abstract : Perovskite solar cells have marked the photovoltaic world with a spectacular increase of efficiencies over the last four years. With efficiencies exceeding 20%, this type of solar cells attracts a particular attention in the photovoltaic field. In the standard perovskite solar cell stack, TiO2 is used as an electron-collecting layer. This oxide layer plays an important role in the cell, however, its growth process requires a high temperature annealing step. In addition to the high production costs involved, its use also exclude its application to temperatures sensitive substrates such as flexible plastic materials.This thesis focuses on the replacement of the TiO2 bilayer by a ZnO electron-collecting and hole-blocking layer. We consider ZnO as an alternative to its comparable and even superior properties. One of the interests of the choice of ZnO lies in its simplicity of implementation and the possibility to synthesize it at low temperature (<100°C) and under different structures. The ZnO is here synthesized by electrochemical way and sputtering process. Under optimized deposition conditions of perovskite and ZnO layers, record efficiencies of 14.2% and 9.7% have been obtained in planar and nanostructured architecture respectively.
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Warda Hadouchi. Etude de l'utilisation du ZnO comme contact de type n dans des dispositifs photovoltaïques à base de pérovskite hybride. Matériaux. Université Paris-Saclay, 2017. Français. ⟨NNT : 2017SACLX012⟩. ⟨tel-01633008⟩

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