Condensed Polycyclic Compound for Red OLED Efficiency

The patent applies parameter changes by systematically modifying the molecular structure of the condensed polycyclic compound through substituent introduction at specific positions (R1-R22) on the dibenzo[f,f′]diindeno[1,2,3-cd:1′,2′,3′-lm]perylene skeleton. By changing the chemical parameters (substituent types, positions, and combinations), the patent simultaneously optimizes both the emission wavelength (color purity) and the light emitting efficiency, resolving the contradiction between these two parameters.

The patent employs composite material design by creating a complex substituted polycyclic aromatic hydrocarbon structure that combines the rigid dibenzo[f,f′]diindeno[1,2,3-cd:1′,2′,3′-lm]perylene core with various functional substituents (alkyl, aryl, heterocyclic groups). This composite molecular structure simultaneously provides enhanced stability for extended element life and optimized electronic properties for improved light emitting efficiency.

The patent applies local quality principle by introducing specific substituents at predetermined positions (R1-R22) on the polycyclic aromatic hydrocarbon skeleton. Each substituent location is strategically designed to locally modify the electronic distribution and HOMO-LUMO energy levels, thereby precisely controlling the emission characteristics and achieving high color purity in the red spectrum region while maintaining reasonable structural complexity.