09.01.2024 New publication in Advanced Materials Interfaces
We are thrilled to announce that our article "Efficient Energy Transfer and Singlet Fission in Co-Deposited Thin Films of Pentacene and Anthradithiophene", by Nico Hofeditz et al. recently got accepted in Advanced Materials Interfaces! The study originates from a collaboration between our group and the group of Prof. Frank Schreiber from the University of Tübingen.
Singlet fission is as spin-allowed process where one singlet exciton is converted into two triplet excitons with lower energy. In solar cells, this process can potentially enhance the efficiency of the light harvesting layer, because four instead of two charge carriers can be harvested from a single photon. However, the number of compounds with efficient singlet fission is rather limited and it would be desirable to optimize the light harvesting properties and the efficiency of singlet fission independently. In the present work, we demonstrate that this is possible in the molecular material anthradithiophene, which is rather inefficient in terms of singlet fission, but intermixing with small concentrations of the lower band gap material pentacene makes the process very efficient, because excitons and even more localized excimers can funnel into pentacene agglomerates, which enable them to split into triplet excitons.
Original publication: