Perylene-based Organic Solar Cells with Photovoltages above 1.35 V for Possible Coupling with a Photo-rechargeable Battery
Elena Zuccalà a, Anna Jodlbauer a, Matiss Reinfelds a, Thomas Rath a, Ilie Hanzu a, Gregor Trimmel a
a Graz University of Technology, Institute for Chemistry and Technology of Materials (ICTM), NAWI, Stremayrgasse, 9, Graz, Austria
Proceedings of nanoGe Fall Meeting 2021 (NFM21)
#NewOPV21. Advances in Organic Photovoltaics
Online, Spain, 2021 October 18th - 22nd
Organizers: Uli Würfel and Jörg Ackermann
Poster, Elena Zuccalà, 291
Publication date: 23rd September 2021
ePoster: 

The concept of combining organic solar cells for energy harvesting and an electrochemical energy storage component into an integrated compact device exhibits significant advantages: besides the space-saving aspect, a device of this kind could not only find its application in small self-powering sensors, but also in the field of smart clothing.[1]

 

For the realization of a photo-rechargeable system, it is crucial that the organic solar cell delivers a sufficiently high voltage, to allow the photo-charging process. Strategies to reach high voltages would be the usage of tandem solar cells [2] or modules, however, this would make the device structure more complicated and difficult to optimize. On the other hand, single-junction organic solar cells with open-circuit voltages above 1.25 V are rare.[3]

 

In this work, we present single-junction organic solar cells based on PMI-FF-PMI, a non-fullerene perylene-monoimide acceptor, which was able to achieve open-circuit voltages above 1.1 V in combination with the polymeric donor PBDB-T.[4] By blending PMI-FF-PMI with the conjugated polymer D18, which has a downshifted HOMO level compared to PBDB-T, an open-circuit voltage of 1.38 V could be obtained, representing one of the highest photovoltages reached with single-junction organic solar cells so far. These solar cells are prepared in an inverted device architecture and typically reveal photocurrents up to 7.5 mA/cm2, fill factors of 60% and in combination with the high photovoltage, power conversion efficiencies between 5 and 6% are obtained.

 

In this contribution, we present a thorough analysis of the characteristics of these high-photovoltage organic solar cells including optoelectronic, morphological and recombination properties. Moreover, we give an outlook on their potential direct coupling with a lithium-ion battery as well as battery materials suitable for this application.

© Fundació Scito
We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info