Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)
DOI: https://doi.org/10.29363/nanoge.hopv.2024.138
Publication date: 6th February 2024
Organic-inorganic perovskites are hybrid materials with a three-dimensional (3D) structure which have recently been found to demonstrate excellent optical and electronic properties, making them highly suitable for applications such as solar cells, light-emitting diodes, and thin film field-effect transistors (FETs) [1]. While preliminary reports on perovskite FETs showed that the device performance was greatly affected by ion migration, a detailed understanding of how ion migration leads to the instabilities in the characteristics is yet unclear [2]. We systematically investigated the development of non-idealities in the transfer characteristics by turning the film stoichiometry. The FET devices were further investigated by photoluminescence mapping and elemental analysis using electron microscopy enabling the identification of the migration of ionic defects and electrochemical reactions with metal electrodes as the key aspects of the mechanism [3].
To manage these behaviors, we explored the use of two-dimensional (2D) Ruddlesden-Popper perovskites based on the spacer – isobutylammonium, by integrating them into 3D perovskite FETs by forming 3D/2D perovskite heterostructures on the surface of the film. Remarkably, in the 3D/2D heterostructure FETs, there is a reduction in the unwanted hysteresis. Our work presents an effective strategy to integrate 2D perovskites into 3D perovskite FETs, exploit the salient features of both components, and obtain improved device performance. Furthermore, it takes a step towards the realization of the predicted charge transport behavior of perovskite materials for various optoelectronic applications.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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