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 […]
Category: Publications
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 […]
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 […]
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, […]
