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

High-energy blue excitons often lead to material degradation, particularly at the host-guest interface. 124694

Blue OLEDs are critical for full-color displays but typically suffer from shorter lifespans and lower efficiency compared to their red and green counterparts. 124694

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. 124694

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