124694 [VERIFIED]

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

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

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

The host material incorporates a rigid silicon-locked framework to prevent molecular rotation and improve heat resistance. (time to 50% initial brightness) of the devices

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

The development of silicon-locked phosphine oxide hosts represents a major step forward for blue OLED technology. The dual encapsulation strategy not only improves immediate performance metrics but also addresses the long-term stability issues that have historically hindered the commercial application of high-efficiency blue emitters.