Efficient fluorescent OLEDS based on assistant acceptor modulated HLCT emissive state for enhancing singlet exciton utilization
Jayaraman Jayabharathi, Jagathratchagan Anudeebhana, Venugopal Thanikachalam, Sekar Sivaraj
Abstract
OLED with C6/C9 substituted phenanthroimidazoles (DDPPPA/DDPBA) show blue emission with maximum external quantum efficiency (<italic>η</italic><sub>ex</sub>), current efficiency (<italic>η</italic><sub>c</sub>) and power efficiency (<italic>η</italic><sub>p</sub>) of 5.7/6.0%, 10.5/12.0 cd A<sup>−1</sup>and 8.3/9.2 lm W<sup>−1</sup>, respectively.
Topics & Concepts
OLEDFluorescenceSinglet stateAcceptorExcitonPhotochemistryOptoelectronicsMaterials scienceChemistryNanotechnologyAtomic physicsPhysicsOpticsCondensed matter physicsExcited stateLayer (electronics)Organic Light-Emitting Diodes ResearchConducting polymers and applicationsLuminescence and Fluorescent Materials