Boron‐, Sulfur‐ and Nitrogen‐Doped Polycyclic Aromatic Hydrocarbon Multiple Resonance Emitters for Narrow‐Band Blue Emission. Issue 12 (3rd February 2022)

• Record Type: Journal Article
• Authors: Li, Qiang; Wu, Yuliang; Wang, Xingdong; Yang, Qingqing; Hu, Jun; Zhong, Rui; Shao, Shiyang; Wang, Lixiang
• Is Part Of: Chemistry. Volume 28:Issue 12(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-02-03
• Subjects: heavy-atom effects -- multiple resonances -- narrow-band emission -- polycyclic aromatic hydrocarbon -- thermally activated delayed fluorescence; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202104214
• Languages: English
• ISSNs: 0947-6539

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 (kRISC = 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. Abstract : Boron‐, sulfur‐ and nitrogen ‐doped polycyclic aromatic hydrocarbon (PAH) emitters are designed and synthesized to combine high photoluminescent quantum efficiency and rapid reverse intersystem crossing in one multiple resonance system for efficient narrow‐band blue emission with full width at half maximum of 29 nm, which provides an avenue to expand the structure library for PAH skeletons with multiple resonance effect and narrow‐band emission.