Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Poster Session IV
CPP 46.17: Poster
Mittwoch, 14. März 2018, 11:00–13:00, Poster A
Characterization of mm sized CH3NH3PbI3 crystals grown by Inverse Temperature Crystallization — •Stefan Kiesmüller1, Stefan Väth1, Sebastian Hammer1, Andreas Baumann2, and Vladimir Dyakonov1,2 — 1Experimental Physics VI, Julius Maximilian University of Würzburg, 97074 Würzburg — 2Bavarian Center for Applied Energy Research (ZAE Bayern), 97074 Würzburg
Organo lead halide perovskites are an important subject of research due to their promising properties concerning photovoltaics. Up to now, mostly thin films with poly-crystalline nature are formed from solution or vacuum deposition techniques. The role of crystallinity and crystal domain size on the functionality of the perovskite solar cell is in the focus of present research. In order to probe the fundamental properties like the charge carrier transport of the hybrid perovskite semiconductors and its limitations very often large crystals have been studied. Here, we used the technique of Inverse Temperature Crystallisation to grow methylammonium lead iodide (MAPI) crystals of different size and crystal quality. This growth technique for crystals is based on the effect of reverse solubility of some materials in special solvents in remarkably short growth times. The so grown MAPI crystals are characterized by means of X-ray diffraction and scanning electron microscopy. The optical properties are studied by photoluminescence. Finally, Time-of-Flight measurements were performed to investigate the fundamental charge carrier transport.