Regensburg 2019 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 19: Hybrid and Perovskite Photovoltaics II
CPP 19.10: Vortrag
Dienstag, 2. April 2019, 12:00–12:15, H18
Manipulating the excited state of CsPbBr3 nanoplatelets for superior optical properties — •Thomas Morgenstern1, Matthew Jurow2,3, Carissa Eisler2, Jun Kang3, Manuel Engelmayer1, Paul Alivisatos2, 3, Yi Liu3, and Wolfgang Brütting1 — 1University of Augsburg, Institute of Physics, 86135 Augsburg, Germany — 2College of Chemistry, University of California, Berkeley, California 94720, United States — 3Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
Lead halide perovskite (LHP) nanocrystals (NCs) and their light emitting features have recently moved into the focus of optoelectronic applications. However many properties of the nanoparticles remain to be investigated for a complete understanding of their optoelectronic attributes. Of crucial importance for lighting applications is the alignment of the emissive transition dipole moment with respect to the substrate normal, which limits the maximum achievable device performance. [1] To investigate this property we measured the photoluminescence radiation pattern of CsPbBr3 nanoplatelets. As a consequence of the nanocrystal shape, the energy of the emission peak shifts to shorter wavelengths, resulting in a deep blue emission maximum at 460 nm for the investigated nanoplatelets. Further the orientation of the transition dipole moments is confined in space and therefore aligns within the plane of the substrate. Hence the NCs have the potential to outperform existing solutions for blue emitting devices within display and lighting applications. [1] M. Jurow, et. al.: Nano Lett. 17(7) (2017), 4534-4540