Solution-processable graphene oxide as an efficient hole injection layer for high luminance organic light-emitting diodes

The application of solution-processable graphene oxide (GO) as a hole injection layer in organic light-emitting diodes (OLEDs) is demonstrated. High luminance of over 53 000 cd m(-2) is obtained at only 10 V. The results will unlock a route to apply GO in flexible OLEDs and other electrode applications.