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The paper describes a multi-layer stack optimized for blue phosphorescent emitters. 4. Performance Results

A silicon-locked phosphine oxide host structure that provides superior thermal stability and efficient energy transfer. 2. Material Design and Synthesis 124694

High-energy blue excitons often lead to material degradation, particularly at the host-guest interface. The paper describes a multi-layer stack optimized for

(time to 50% initial brightness) of the devices compared to standard host-guest systems. 124694

The inclusion of phosphine oxide groups enhances electron-transporting properties, ensuring a balanced charge injection within the device. 3. Device Fabrication and Strategy