Boron‐, Sulfur‐ and Nitrogen‐Doped Polycyclic Aromatic Hydrocarbon Multiple Resonance Emitters for Narrow‐Band Blue Emission
Qiang Li, Yuliang Wu, Xingdong Wang, Qingqing Yang, Jun Hu, Rui Zhong, Shiyang Shao, Lixiang Wang
Abstract
Abstract Two boron‐, sulfur‐ and nitrogen‐doped polycyclic aromatic hydrocarbon multiple resonance thermally activated delayed fluorescence emitters with high photoluminescent quantum efficiency (88 %) and rapid reverse intersystem crossing (k RISC = 1.0×10 5 s −1 ) are designed and synthesized, enabling efficient narrow‐band blue electroluminescence at 473 nm with full width at half maximum of 29 nm and maximum external quantum efficiency of 22.0 %, which provides an avenue to expand the structure library for multiple resonance emitters and an approach to regulate their emission properties.
Topics & Concepts
Intersystem crossingElectroluminescenceResonance (particle physics)PhotoluminescenceFluorescencePhotochemistryQuantum efficiencyMaterials scienceHydrocarbonOptoelectronicsOLEDResonance fluorescencePolycyclic aromatic hydrocarbonAromatic hydrocarbonEmission spectrumFull width at half maximumQuantum yieldEmission intensityChemistryAnalytical Chemistry (journal)QuantumLuminescenceAggregation-induced emissionOrganic Light-Emitting Diodes ResearchLuminescence and Fluorescent MaterialsOrganoboron and organosilicon chemistry