[MEET3] Emerging Quantum Dots and Nanotechnologies (1)

[MEET3-2(Invited)] Horizontally Oriented Exciton Dipoles in Solution-Processed Quantum Dot Solids

*Chih-Jen Shih¹, Jakub Jagielski¹, Simon Solari¹, Sudhir Kumar¹ (1. ETH Zurich, Switzerland (Switzerland))

Keywords:Quantum Dots, Perovskites, Light-Emitting Diodes

It is well-known that the horizontally oriented exciton transition dipole moments in thin films of quantum emitters can direct radiation perpendicular to the substrate, maximizing the light outcoupling efficiency. Exciton orientation control has been reported in many thermally evaporated organic molecular thin films but has not yet been realized in solution-processed quantum dots films. Here, we demonstrate that excitons in solution-processed thin films comprised of colloidal quantum wells (CQWs) of lead trihalide perovskites are horizontally oriented, with thin-film photoluminescent quantum yields of up to 90%.