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Theses

Pérovskites Halogénées pour l'électronique

Abstract : Although the Halogenated Perovskites based 3rd generation of solar cells are very promising, they suffer from a too short lifetime, which is due to a high instability of the Perovskite material towards the moisture in air. Since 10 years, many studies have considerably improved the lifespan of these solar cells, thanks in part to the engineering of the Perovskite material. That is in this context that the results of this thesis are located. Here, in this manuscript, the discovery of the new family of lead (or Tin) and Iodide (or Bromide) deficient Halogenated Perovskites is reported (abbreviated d-PHs). The d-PHs, particularly the Iodoplumbates d-PHs, present a lead lightened 3D Perovskite structure, and tolerate the incorporation of cations that don't respect the imposed limitation from the Goldschmidt factor. The Iodoplumbates d-PHs show suitable optoelectronic properties for an application in solar cells. Moreover, this d-PHs are more stable in open air, towards moisture. Remarkably, some of these d-PHs show a stability more than ten times higher than the stability of their non-deficient Perovskite counterparts. This d-PHs family opens up a new path for the chemistry of the 3D-structure Halogenated Perovskites, and also offers the possibility to combine efficiency and stability for Perovskites solar cells.
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Antonin Leblanc. Pérovskites Halogénées pour l'électronique. Chimie inorganique. Université d'Angers, 2019. Français. ⟨NNT : 2019ANGE0006⟩. ⟨tel-02496073⟩

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