Great news! After several rounds of review, which included a change of the title, our study on the effect of slow carrier relaxation on the open-circuit voltage of organic solar cells (see previous entry) has now finally been published in the Journal of Physical Chemistry Letters. In the article we argue that the open-circuit voltage […]
It is known that photogenerated charge carriers in organic solar cells can be extracted before they are fully thermalised. The reason is that the relaxation to the quasi-equilibrium energy is carried out by hopping in a disorder-broadened density of states, which is a slow process. Until now, however, it was not clear whether this effect […]
Last week Sebastian gave an invited talk in the Solar Cell Technology Group at Uppsala University in Sweden. Due to the current restrictions caused by the COVID-19 pandemic, the event took place virtually. The topic of the talk was recombination in organic solar cells and many results from ReMorphOPV were included in the presentation. The […]
The question how the nanoscale blend morphology of an organic solar cell determines the free charge carrier recombination rate remains largely unanswered. In a recent paper published in Advanced Electronic Materials, we provide new insight in this topic by revisiting the P3HT:PCBM blend system that dominated organic solar cell research a decade ago. Even though […]
Sebastian had the opportunity to contribute a chapter on Charge Recombination in Organic Solar Cells to the book Soft-Matter Thin Film Solar Cells: Physical Processes and Device Simulation that was recently published online and in print by AIP Publishing. The chapter provides a broad overview of different recombination mechanisms and is divided into the parts […]
Kinetic Monte Carlo (KMC) simulations are a powerful tool to describe microscopic processes in disordered materials such as charge carrier transport and recombination. However, describing the macroscopic performance of complete devices such as organic solar cells has proven exteremely challenging. In our latest paper published in Solar RRL, we introduce a KMC model that is […]
As of today, the ReMorphOPV project is at home at Åbo Akademi University in Turku, Finland. The research is carried out in Prof. Ronald Österbacka’s group at the Faculty of Science and Engineering. The change of the hosting organisation was necessary because the previous host research group at Linköping University was discontinued. The goals and […]
Space charge effects in the active layer usually lead to a degraded device performance of organic solar cells. In principle, there are two possible reasons for the build-up of space charge: unintentional doping and imbalanced charge transport. Although these are fundamentally different phenomena, they lead to the very same degradation of the device current-voltage curve, […]
Sebastian presented our latest results on kinetic Monte Carlo simulations of organic solar cells at the 2019 nanoGe Fall Meeting held from 4 to 8 November in Berlin. The nanoGe Fall Meeting is a unique series of focused symposia on fundamental properties and preparation of advanced materials and their applications in fields such as photovoltaics […]
The European Conference on Molecular Electronics (ECME) is one of the key conferences in the field of organic electronics and photonics. It was a special pleasure for us that the 15th edition of ECME was held right on our doorstep in Linköping from 27 to 31 August 2019. The conference was organised by our close […]
