What is special about Y6; the working mechanism of neat Y6 organic solar cells

Elifnaz Sağlamkaya; Artem Musiienko; Mohammad Saeed Shadabroo; Bowen Sun; Sreelakshmi Chandrabose; Oleksandra Shargaieva; Giulia Lo Gerfo M.; Niek F. van Hulst; Safa Shoaee

doi:10.1039/D2MH01411D

What is special about Y6; the working mechanism of neat Y6 organic solar cells†

Elifnaz Sağlamkaya,

^a Artem Musiienko,

^b Mohammad Saeed Shadabroo,^a Bowen Sun,^a Sreelakshmi Chandrabose,^c Oleksandra Shargaieva,^d Giulia Lo Gerfo M.,

^e Niek F. van Hulst

^ef and Safa Shoaee

*^a

Author affiliations

* Corresponding authors

^a Disordered Semiconductor Optoelectronics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam-Golm, Germany
E-mail: shoai@uni-potsdam.de

^b Department Novel Materials and Interfaces for Photovoltaic Solar Cells, Helmholtz-Zentrum Berlin für Materialien und Energie, Kekuléstraße 5, 12489 Berlin, Germany

^c Soft Matter Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam-Golm, Germany

^d Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, HySPRINT Innovation Lab, Department “Solution Processing of Hybrid Materials & Devices” (SE-ALM), Kekuléstr. 5, Berlin 12489, Germany

^e ICFO – Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain

^f ICREA – Institució Catalana de Recerca i Estudis Avançats, Passeig Lluís Companys 23, 08010 Barcelona, Spain

Abstract

Non-fullerene acceptors (NFAs) have delivered advancement in bulk heterojunction organic solar cell efficiencies, with a significant milestone of 20% now in sight. However, these materials challenge the accepted wisdom of how organic solar cells work. In this work we present a neat Y6 device with an efficiency above 4.5%. We thoroughly investigate mechanisms of charge generation and recombination as well as transport in order to understand what is special about Y6. Our data suggest that Y6 generates bulk free charges, with ambipolar mobility, which can be extracted in the presence of transport layers.

This article is part of the themed collections: 2023 Materials Horizons Most Popular Articles and Materials Horizons 10th anniversary regional spotlight collection: Europe

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DOI: https://doi.org/10.1039/D2MH01411D
Article type: Communication
Submitted: 15 Nov 2022
Accepted: 03 Feb 2023
First published: 01 Mar 2023

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Mater. Horiz., 2023,10, 1825-1834

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What is special about Y6; the working mechanism of neat Y6 organic solar cells

E. Sağlamkaya, A. Musiienko, M. S. Shadabroo, B. Sun, S. Chandrabose, O. Shargaieva, G. Lo Gerfo M., N. F. van Hulst and S. Shoaee, Mater. Horiz., 2023, 10, 1825 DOI: 10.1039/D2MH01411D

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What is special about Y6; the working mechanism of neat Y6 organic solar cells†

Abstract

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What is special about Y6; the working mechanism of neat Y6 organic solar cells

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