Department of Chemistry
Highly efficient iridium(III) phosphors with phenoxy-substituted ligands and their high-performance OLEDs
Two new iridium(iii) cyclometallated complexes (1 and 2) based on the 2-(1-phenoxy-4-phenyl)-5-methylpyridine ligand have been developed. By attaching a flexible phenoxy group on the phenyl ring of 2-phenylpyridine (Hppy), the light-emitting properties of the resulting IrIII complexes have been improved, while the introduction of an electron-donating methyl group on the pyridyl ring of Hppy can keep the triplet emission in the green region by compensating for the reduced energy gap caused by the phenoxy group. Owing to the unique electronic structures induced by the ligand, the vacuum-evaporated organic light-emitting devices (OLEDs) of the type [ITO/NPB (40 nm)/(1 or 2):CBP (20 nm)/BCP (10 nm)/Alq
Source Publication Title
Journal of Materials Chemistry C
Royal Society of Chemistry
Link to Publisher's Edition
Tan, Guiping, Shuming Chen, Ning Sun, Yanhu Li, Daniel Fortin, Wai-Yeung Wong, Hoi-Sing Kwok, Dongge Ma, Hongbin Wu, Lixiang Wang, and Pierre D. Harvey. "Highly efficient iridium(III) phosphors with phenoxy-substituted ligands and their high-performance OLEDs." Journal of Materials Chemistry C 1.4 (2012): 808-821.