Michael Cass

Thermally Activated Delayed Fluorescence in Polymers: A New Route toward Highly Efficient Solution Processable OLEDs

Efficient intermonomer thermally activated delayed fluorescence is demonstrated for the first time, opening a new route to achieving high-efficiency solution processable polymer light-emitting device materials. External quantum efficiency (EQE) of up to 10% is achieved in a simple fully solution-processed device structure, and routes for further EQE improvement identified.

56.1: Invited Paper: Excited State Interactions in P-OLEDs: Implications For Efficiency And Lifetime

A fluorescent blue P-OLED has high densities of triplet excited states within the emissive layer. In this paper we will present an efficiency and degradation analysis of model P-OLED devices and materials, and demonstrate that control of triplet transfer and annihilation processes are of crucial importance in realising the efficiencies and device stabilities required for commercialisation of the technology.