Organic Optoelectric Compound for High Efficiency OLEDs

The patent employs composite organic materials comprising multiple functional units: a core unit (indolocarbazole or phenanthroindolizine) providing charge transport capability, fused aromatic rings (phenanthrene, carbazole, dibenzofuran, dibenzothiophene) enhancing stability and mobility, and substituent groups (triphenylamine, carbazole, dibenzofuran, dibenzothiophene) further improving electrochemical properties. This composite structure achieves high hole and electron mobility while maintaining excellent electrochemical stability for large-size OLED applications.

The patent systematically varies molecular parameters including the type of core unit (indolocarbazole vs. phenanthroindolizine), the number and position of fused aromatic rings, and the nature of substituent groups to optimize the balance between charge mobility and electrochemical stability. By adjusting these molecular parameters, the invention achieves the required performance threshold for large-size OLEDs while managing structural complexity.

The patent divides the organic material into distinct functional segments: a core unit responsible for basic charge transport, fused aromatic ring systems that enhance mobility and stability, and substituent groups that fine-tune electrochemical properties. This segmentation allows independent optimization of each functional element, achieving high luminous efficiency and lifespan while managing design complexity through modular construction.

The patent designs organic materials with multi-functional units where each component serves multiple purposes: the core unit provides charge transport, fused aromatic rings enhance both mobility and electrochemical stability, and substituent groups contribute to both charge transport and device stability. This multi-functionality achieves high luminous efficiency and lifespan without proportionally increasing design complexity.