Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 31: Hybrid and Perovskite Photovoltaics III (joint session CPP/DF/DS/HL, organized by DS)
CPP 31.2: Vortrag
Mittwoch, 9. März 2016, 09:45–10:00, H11
Two dimensional organometal halid perovskite nanosheets in light emitting application — •Rui Wang1, Zhendong Fu1, Vitaliy Pipich1, Alexandros Koutsioumpas1, Stefan Mattauch1, Peter Müller-Buschbaum2, and Henrich Frielinghaus1 — 1Jülich Center for Neutron Science, outstation at FRM II, Lichtenbergstr. 1, 85747 Garching — 2TU München, Physik-Department, LS Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching
Two dimensional functional materials have created intensive research interest for high efficiency solar cells. Recently low dimensional pervoskite nanocrystals, such as 2D perovskite nanosheets have been reported to possess reduced fluorescence decay times, an increased exciton binding energy and low conductivity in certain crystallographic directions. Consequently, these lower dimensional perovskites can be utilized for light emitting applications. In the present work, 2D nanosheet perovskites are formed by using octylamine bromide as capping ligands. GISANS combined with neutron reflectivity (NR) are applied to investigate the structure buried inside the thin films. GISANS had proven to be a powerful technique for thin film morphology investigations. NR guarantees that information about nanometer sized layers can be accessed. We present the determined structures in terms of optical properties, grain size information and stacked layered characteristic.