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Communication Dans Un Congrès Année : 2024

Carbon-based mesoscopic perovskite solar cells: new insights for promising efficiency and durability enhancements.

Résumé

Perovskite materials have a great potential for high efficiency in photovoltaic devices and the best performances have now exceed 26% in single junction. We now need to further develop perovskite device architectures that combine simple industrial development with effective durability. Recently, a novel type of architecture emerged for which no hole transport layer is needed thanks to carbon electrodes which are able to extract photo-generated holes by themselves. Consequently, the use of carbon-based perovskite solar cells (C-PSC) with inexpensive and stable carbon electrode not only enhances the durability of the devices but also reduces fabrication costs. In the presented work, the perovskite deposition has been realized using a final perovskite infiltration through a mesoporous scaffold composed of metal oxide and carbon layers, affording a clean industrial process for large-scale and stable perovskite devices. Different variations will be here explored, including the formulation of the perovskite, the technique of infiltration for the perovskite, the implementation of a post-treatment, and the choice of the encapsulation process. A study of the occurring mechanisms will be conducted using a full set of characterization techniques including J-V measurements, UV-visible and photoluminescence (PL) spectroscopies, light-beam induced current (LBIC) and PL imaging mappings, X-ray diffraction (XRD), Scanning electron microscopy (SEM), Raman spectroscopy and Electrochemical impedance spectroscopy (ESI). Finally, the impact on the durability of photovoltaic performances of all the selected variations will be investigated in order to define the more promising paths to future industrial applications. A special attention will also be given to the method used to measure performances by analyzing J-V curves at different scan rates. Indeed, this allowed us to define boundary conditions allowing the observation of two different states within our devices (defined as ‘stable’ and ‘metastable’). This behavior was interpreted as a structural transition and can vary upon aging according to the selected device configuration.

Domaines

Matériaux
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Dates et versions

hal-04462324 , version 1 (16-02-2024)

Identifiants

Citer

Lara Perrin, Emilie Planes, Ryuki Tsuji, Stéphanie Narbey, Cynthia Farha, et al.. Carbon-based mesoscopic perovskite solar cells: new insights for promising efficiency and durability enhancements.. 7th Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP24), Jan 2024, Tokyo, Japan. ⟨10.29363/nanoge.iperop.2024.012⟩. ⟨hal-04462324⟩
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