Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
Publication date: 20th April 2022
Layered materials have recently emerged to address the issues of stability and performance that are limiting the potential applications of perovskite solar cells. However, these materials are currently limited by their poor charge transport characteristics.
Recent research efforts have been focused largely on maximizing performance with good success using aromatic-based Ruddlesden-Popper layered materials. In order to make further progress and guide future synthetic efforts, the relationship between the structure and charge transport needs to be fully disentangled.
Here, the interlayer spacing and the symmetry of the crystal dictate the majority of the optoelectronic properties of the material. Typically, this is explained by a tunnelling mechanism, where the barrier width determines the likelihood of the process, and therefore the conductivity. In addition, the relative positions of the energy bands also influence this parameter. In these systems, the energetics of the organic cations are given by their building blocks, but they simultaneously determine the structure, making disentangling these effects difficult.
In this poster, I investigate the structures of low-dimensional films containing aromatic and aliphatic functional groups. I determine the interlayer spacing by X-Ray diffraction measurements, which I then compare to the in-plane and out-of-plane charge transport characteristics.
My results show that simplistically focusing on reducing the interlayer width, for instance by shortening the length of aliphatic chains, is not sufficient. This can lead to a break of the symmetry of the perovskite sheets, I.e., a jagged quasi-layered perovskite.
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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.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.