MLZ Conference: Neutrons for Energy

Low dimensional lead bromide perovskite in light emitting application – investigation on structure evolution via neutron scattering

19 Jul 2016, 16:50

2h 40m

Hotel Wyndham Grand Axelmannstein, Bad Reichenhall, Germany

Board: 29

Poster Solar Energy Poster Session

Speaker

Mr Rui Wang (Jülich Center for Neutron Science, outstation at FRM II, Lichtenbergstr. 1, 85747 Garching)

Description

Two dimensional functional materials have created intensive research interest for high efficiency solar cells. Recently low dimensional pervoskite nanocrystals, such as 2D perovskite nanoplatlates 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 octylammonium 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 results in terms of morphology formation evolution, stacked layered characteristic and optical properties.