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Nouveaux contacts sélectifs pour des cellules à pérovskites hybrides très efficaces

Abstract : This thesis work aimed at realizing efficient, stable, and reproducible photovoltaic perovskite solar cells, and to achieve a good understanding of the cells functioning. In Chapter 1, we present the context of the research on solar cells and PSC components as well as a description of the main techniques employed for the device characterizations. Chapter 2 provides a comparative study of two different CH3NH3PbI3 deposition techniques (1-step and 2-step). It is clear that both of them are suitable for the preparation of PSC which resulted in more than 17% PCE. In Chapter 3, we have thoroughly studied the two main kinds of organic hole transporting materials: molecular and polymeric. We have also investigated the doping effect on these HTMs. Through impedance spectroscopy measurement, we could clearly see that doping is really important to get high efficiency for Spiro-OMeTAD cells, while the improvement was less significant in the case of P3HT cells. In Chapter 4, we have investigated several new carbazole derivatives as hole transporting materials. These molecules ranged from the big dendritic core B186 to the DMs and iDMs series with lower molecular weight. B186 and iDM1 showed the highest efficiency at 14.59% and 15.04%, respectively. In Chapter 5, we have studied a simple planar structure of PSC by incorporating a wide bandgap n-type semiconductor SnO2 as the hole blocking layer. Planar cells have been prepared using this layer combined with MAPI(1)-SOF and FAMA perovskites. With FAMA absorber, the devices were highly efficient with a maximum PCE of 18.2% and were almost hysteresis-free (6.7% HI) while, with MAPI(1)-SOF, the obtained efficiency was 15.2% with higher hysteresis.
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Submitted on : Wednesday, June 10, 2020 - 5:24:14 PM
Last modification on : Sunday, June 26, 2022 - 2:50:42 AM


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Maria Ulfa. Nouveaux contacts sélectifs pour des cellules à pérovskites hybrides très efficaces. Autre. Université Paris sciences et lettres, 2019. Français. ⟨NNT : 2019PSLEC005⟩. ⟨tel-02863936⟩



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