Singlet and triplet energy transfer in two-dimensional hybrid perovskites

• Applicant: Professor Dr. Simon Kahmann
• Subject Area: Experimental Condensed Matter Physics
• Term: since 2025
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 555249208

By combining the excellent semiconducting properties of metal-halide frameworks with the immense functionalization possibilities of organic molecules, two-dimensional (2D) Hybrid Organic-Inorganic Perovskites (HOIPs) represent the ideal playground to obtain novel materials with targeted opto-electronic properties. Both charge and energy transfer between the inorganic and organic components have been reported in these hybrids, when π-conjugated spacer molecules template the lattice. In INTENSITY (sINglet and Triplet Energy traNSfer In Two-dimensional hYbrid perovskites), we aim at designing and synthesizing novel 2D HOIPs with optimized inorganic-organic energy transfer, both considering the transfer of spin-singlet and spin‑triplet excitons. In such a way, we aim to design desired interaction mechanisms, for example, to create efficient emitters with large Stokes shift and low reabsorption, as required for scintillators or efficient and tuned luminescence for use in light-emitting diodes. To reach this ambitious goal, we rely on a holistic approach that combines synthetic chemistry, optical spectroscopy, and theory and simulations. In addition to the expected output in terms of new materials, INTENSITY will build a sound fundamental understanding of the charge/energy/spin transfer phenomena taking place at the interface between the metal halide framework and π-conjugated molecules, which is crucial for further exploitation of these hybrids.

• DFG Programme: Research Grants
• International Connection: Belgium
• Partner Organisation: Fonds Wetenschappelijk Onderzoek - Vlaanderen ; Research Foundation Flanders (FWO)
• Cooperation Partners: Professor Dr. David Jacques Beljonne; Professor Dr. Wouter Van Gompel