Novel tetracoordinated organoboron emitters for thermally activated delayed fluorescence organic light-emitting diodes. (April 2021)

• Record Type: Journal Article
• Authors: Huang, Taian; Chen, Zhanxiang; Zou, Yang; Gong, Shaolong; Yang, Chuluo
• Is Part Of: Dyes and pigments. Volume 188(2021)
• Publication Date: 2021-04
• Subjects: Tetracoordinated organoboron -- Thermally activated delayed fluorescence -- Organic lightemitting diodes -- Halogen-free -- Acceptor; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2021.109192
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: A novel three-dimensional tetracoordinated organoboron acceptor bearing C^N^C chelate was developed by the direct borylation of pyridine derivatives. Donor-acceptor type emitter based on this novel organoboron acceptor exhibited good stability, high photoluminescence quantum yield (PLQY) and thermally activated delayed fluorescence (TADF) character. By selecting different donors with different electron donating abilities, two distinct electroluminescence devices with white and green emission achieved maximum external quantum efficiency of over 10%. Highlights: A novel tetracoordinated organoboron acceptor bearing C^N^C chelate. Donor-acceptor type emitter based on this acceptor exhibited thermally activated delayed fluorescence. White and green EL devices with maximum external quantum efficiency of over 10%.