Combinatorial Optimization of Polymeric Anodes for Use in Organic Light-Emitting Diodes

摘要

Organic light-emitting diodes (OLEDs) represent a promising technology for fiat-panel displays. Doped ?π-conjugated polymer layers have been demonstrated to improve hole injection and lifetime of OLED devices. In this paper, we demon-strate that the work function of such polymers can be continuously adjusted by means of electrochemical doping. This allows to control the hole current through organic semiconducting devices. Injection-limited or bulk-limited device performance can be obtained with the identical semiconductor. We use a combinatorial approach to speed up the optimization process.