Regensburg 2019 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 37: Poster Session III
CPP 37.17: Poster
Mittwoch, 3. April 2019, 11:00–13:00, Poster B1
Using polymeric hole-injection layers for solution-processed Perovskite-based light-emitting diodes — •Tassilo Naujoks1, Thomas Morgenstern1, Manuel Engelmayer1, Matthew Jurow2, Yi Liu2, and Wolfgang Brütting1 — 1Institute of Physics, University of Augsburg, 86135 Augsburg, Germany — 2Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America
Replacing common organic emitters with Lead-Halide Perovskites, like CsPbBr3, is a promising approach towards low cost, efficient and narrow emission-band LEDs. While showing high photoluminenscent quantum-yields in thin films [1], achieving similarly high performance in elec devices proves to be challenging. Protection of the hole injection layer either by shielding films or orthogonal solvents has a huge effect on the optoelectronic properties. A hole-injection layer for a solution-processed emitter should not be impaired by the respective solvent. Such films can be formed by crosslinked polymers.
In this study we investigate the synergy of poly-TPD as hole-injection polymer and CsPbBr3 quantum dots as emitter in an otherwise common organic LED stack. Furthermore the use of different polymers or combinations show significantly increased efficiency. The efficiency proves to be correlated to the respective solvent susceptibility of the layers. The findings are of huge importance for future applications of lead-halide perovskites in optoelectronic lighting applications.
[1] Becker, Michael, et. al. Nature 553, 189 (2018)