Highly Efficient Organic Light-Emitting Devices with Double Interfacial Layers

摘要

We report on a highly efficient phosphorescent organic light-emitting devices achieved by introducing nanoscale double interfacial layers. The double interfacial layers play multiple roles in the enhancement of devices performance: increasing electron injection, hole-blocking, and preventing luminescence quenching at the electrode surface. As an experimental result, current efficiency was improved to 240%, yielding a peak brightness over 40,000 cd/m{sup}2 and peak efficiency over 60 cd/A.