Pyrene-Based Non-Doped Blue Hot-Exciton OLEDs with Hybrid Local and Charge-Transfer States: Achieving High efficiency and Low Efficiency Roll-Off

Key Points

• The research aims to improve the efficiency of blue OLEDs by using non-doped pyrene-based materials and examining exciton conversion pathways.
• Examined fluorescent materials to facilitate exciton conversion.
• Utilized pyrene as a base for designing OLEDs.
• Analyzed efficiency and roll-off characteristics of the OLEDs.
• Achieved high efficiency in the OLEDs using hot exciton pathways.
• Demonstrated low efficiency roll-off at high brightness levels.
• Showed effective energy transfer from triplet to singlet excitons.