A versatile ferrocene-containing material as a p-type charge generation layer for high-performance full color tandem OLEDs

Abstract

A novel p-type charge generation material, DPAF, composed of a ferrocene core and a bis(biphenyl)amino group is designed and synthesized for application to tandem OLED devices. This molecular design not only enhances the thermal properties of ferrocene and the hole mobility, but also maintains its electrochemical stability. The red, green, and blue tandem OLEDs all give excellent device performance with low efficiency roll-off by using n-type C₆₀ and p-type DPAFs as charge generation layers.