Guichen Yu, Mengna Yin, Jiangnan Zhu
May 11, 2021
Citations
0
Influential Citations
3
Citations
Journal
Tetrahedron
Abstract
Abstract In this work, two novel compounds 9-(4'-(4,6-bis(9,9-dimethyl-9H-fluoren-2-yl)-1,3,5-triazin-2-yl)-[1,1′-biphenyl]-4-yl)-9H-carbazole (TPBDF-Cz1) and 3-(4-(4,6-bis(9,9-dimethyl-9H-fluoren-2-yl)-1,3,5-triazin-2-yl)phenyl)-9-phenyl-9H-carbazole (TPBDF-Cz2) were synthesized and fully characterized by taking advantage of carbazole, 1,3,5-triazine and fluorene groups. Both materials exhibit extremely excellent thermal properties, appropriate HOMO and LUMO energy levels and high triplet energy. With the beneficial physical behaviors through measuring their optical and electrochemical properties, green PhOLEDs with the two materials acting as host were designed and fabricated. Both devices reveal a low turn-on voltage of 3.0 V and good electroluminescence performance owing to the balanced hole and electron transport mobilities. Besides, it was found that the TPBDF-Cz1-based device is slightly more efficient than the TPBDF-Cz2-based one because of higher carrier transport ability of TPBDF-Cz1. The relevant results indicate TPBDF-Cz1 opens up a new perspective for designing hosts for high performance PhOLEDs.