Mobility in Amorphous Organic Hole Transport Materials
Miriam Fsadni a, Thomas Pope a, Thomas Penfold a, Pablo Docampo b
a School of Natural and Environmental Sciences, Newcastle University, UK, Newcastle upon Tyne, Reino Unido, Newcastle upon Tyne, United Kingdom
b School of Chemistry, University of Glasgow, University Pl, G12 8QQ, Glasgow, UK
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP23)
Kobe, Japan, 2023 January 22nd - 24th
Organizers: Seigo Ito, Hideo Ohkita and Atsushi Wakamiya
Poster, Miriam Fsadni, 090
Publication date: 21st November 2022

Perovskite solar cells (PSC) are widening the scope of photovoltaics (PVs) to applications beyond the effective capabilities of conventional silicon-based PVs. They are able to operate efficiently under low light conditions and can easily be printed as cheap lightweight-flexible devices, making them suitable for integration within indoor and portable systems. [1]

The organic hole transporter material (HTM) used plays a major role in controlling the overall performance and cost of PSCs. One challenge is charge recombination, due to charge build- up at the HTM/perovskite interface, which limits the efficiency of the solar cell. [2] In addition, state-of- the-art HTMs, such as Spiro-OMeTAD, are expensive and difficult to synthesise thereby reducing commercially viability. [3] As a result, inexpensive aromatic amide, azomenthine and hydrazone-based HTMs have been developed employing simple Schiff-base condensation chemistry, the structures of which can be tuned to optimise performance. [1,2,4]

By combining theoretical and experimental approaches, we are looking to understand the improved charge transport properties of novel materials with disrupted conjugation in the backbone, built using condensation chemistry. Based on our results, we aim to design and synthesise improved materials for use within PSCs. Here we present our recent findings from theoretical studies on the relationship between the HTM electronic dipole moment and charge carrier mobility.

Professor Elizabeth Gibson, Dr Yvelin Giret, Dr Julien Eng, Dr Dimitru Sirbu. This research made use of the Rocket High Performance Computing service at Newcastle University.

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