Investigating Thin Li-Halide Cathodic Interlayers for Improved Electron Injection

摘要

Electron injection into the electroluminescent polymer layer is an important rate-limiting step in the operation of polymer light-emitting diodes(PLEDs).Since these semiconducting polymers are better hole transporters than electron transporters,enhanced electron injection is important for achieving balanced current components in the device.Previous research had demonstrated improved device efficiency by inserting a thin compound interlayer,such as an alkali metal fluoride,between the Al cathode and the electroluminescent polymer.