Increase the molecular length and donor strength to boost horizontal dipole orientation for high-efficiency OLEDs

• Published in: Journal of materials chemistry. C, Materials for optical and electronic devices Vol. 1; no. 24; pp. 9241 - 9248
• Main Authors: Chen, Yi-Kuan, Jayakumar, Jayachandran, Ko, Chang-Lun, Hung, Wen-Yi, Wu, Tien-Lin, Cheng, Chien-Hong
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 23.06.2022
• Subjects: Carbazoles; Chemical compounds; Current efficiency; Dipoles; Emitters; Horizontal orientation; Photoluminescence; Power efficiency; Quantum efficiency; Thermal stability

Three pyridine-carbonitrile (PPC) fluorophores with amine-type donors, carbazole, tert -butylcarbazole, and spiroacridine have been designed and synthesized. These PPC-based emitters exhibit excellent photoluminescence quantum yields of 92-100%, thermally activated delayed fluorescence (TADF) and th...