Jump to main content
Jump to site search


Fast synthesis of iridium(III) complexes with sulfur containing ancillary ligand for high-performance green OLEDs with EQE over 31%

Abstract

Three green iridium(III) cyclometalated complexes, (4tfmppy)2Ir(dipdtc), (24btfmppy)2Ir(dipdtc) and (TN4T)2Ir(dipdtc), with the sulfur containing ancillary ligand of N,N-diisopropyldithiocarbamate (dipdtc) were synthesized for fifteen minutes at room temperature. The emission colours (peak = 497 - 534 nm) and photoluminescence quantum efficiencies (P = 71.6% - 94.2%) can be effectively regulated by introducing different main ligands of 2-(4-(trifluoromethyl)phenyl)pyridine (4tfmppy), 2-(2,4-bis(trifluoromethyl)phenyl)pyridine (24btfmppy) and 2',6'-bis(trifluoromethyl)-2,4'-bipyridine (TN4T), respectively. Employing these complexes as emitters, the organic light emitting diodes (OLEDs) with double-emitting layers were fabricated. Particularly, the device based on complex (TN4T)2Ir(dipdtc) showed superior performances with a maximum current efficiency of 86.59 cd A-1 and a maximum external quantum efficiency of 31.24% with low efficiency roll-off. These results suggest that the Ir(III) complexes with the four-membered ring Ir-S-C-S backbone containing N,N-diisopropyldithiocarbamate have potential application in OLEDs.

Back to tab navigation

Supplementary files

Publication details

The article was received on 14 Mar 2019, accepted on 07 May 2019 and first published on 07 May 2019


Article type: Paper
DOI: 10.1039/C9TC01397K
J. Mater. Chem. C, 2019, Accepted Manuscript

  •   Request permissions

    Fast synthesis of iridium(III) complexes with sulfur containing ancillary ligand for high-performance green OLEDs with EQE over 31%

    G. Lu, Z. Tu, L. Liu, W. Zhang and Y. Zheng, J. Mater. Chem. C, 2019, Accepted Manuscript , DOI: 10.1039/C9TC01397K

Search articles by author

Spotlight

Advertisements