124694 [WORKING]

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

The inclusion of phosphine oxide groups enhances electron-transporting properties, ensuring a balanced charge injection within the device. 3. Device Fabrication and Strategy 124694

The silicon-locked host enables highly efficient blue emission with minimized non-radiative loss. 124694

The host material incorporates a rigid silicon-locked framework to prevent molecular rotation and improve heat resistance. 124694

This approach involves trapping electron-transporting molecules within the host matrix to minimize exciton quenching and reduce the efficiency roll-off at high luminance.

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

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