Emitter Orientation as a Key Parameter in Organic Light-Emitting Diodes

Abstract

Neatness counts, even in optoelectronics. Controlling the orientation of dye molecules in an organic light-emitting diode (OLEDs) is a powerful tool to improve its light outcoupling. By aligning transition-dipole-moment vectors parallel to the substrate plane, up to 40% quantum efficiency can be achieved. The authors give a comprehensive review of the physics behind this phenomenon, and highlight prospects for future device designs.