In the field of organic photovoltaics there is a rising star in the family of perovskites called methylammonium lead iodide (MAPbI3). This semiconductor material can readily be used for solar cell applications as well as light emitting technology due to its exceptional electronic and optical properties. Absorption is very broad and charge carrieres are extremely long lived, which creates ideal conditions for solar cells. At the same time the material has a direct bandgap, which makes it an efficient light emitter.
In the Single Molecule Spectroscopy group we aim to study these properties on an individual crystal scale since ensemble measurements often obscure them. Our goal with this project is to further the understanding of the fundamental processes in these materials under operational conditions.
Exploring the Electronic Band Structure of Organometal Halide Perovskite via Photoluminescence Anisotropy of Individual Nanocrystals (D. Täuber et. al. Nano Letters 2016)
Giant Photoluminescence Blinking of Perovskite Nanocrystals Reveals Single-Trap Control of Luminescence (Y. Tian et. al. Nano Letters 2015)
Super-Resolution Luminescence Microspectroscopy Reveals Mechanism of Photoinduced Degradation in CH3NH3PbI3 Nano-Crystals (A. Merdasa et. al. JPCC 2015)