Ubon Ratchathani University; National Science & Technology Development Agency - Thailand; National Metal & Materials Technology Center (MTEC); Thammasat University
Type
Article; Proceedings Paper
Source Title
ACTA PHYSICA POLONICA A
ISSN
0587-4246
Year
2015
Volume
127
Issue
4
Page
1109-1111
Open Access
gold
Publisher
POLISH ACAD SCIENCES INST PHYSICS
DOI
10.12693/APhysPolA.127.1109
Format
PDF
Abstract
Two heteroleptic charged iridium (III) species comprising two cyclometallating ligands and a neutral diimine ligand were synthesized and characterized, namely [(3,4,7,8-tetramethyl-1,10-phenanthroline-N-N')-bis-(2-(2,4-difluorophenyl)-5-(trifluoromethyl)pyridine-C-6',N)-iridium (III)]hexafluorophosphate (UM01) and [(3,4,7,8-tetramethy1-1,10-phenanthroline-N-N')-bis-(2-(2',4'-difluoro-phenyl)-1H-pyrazole-C-6',N)-iridium (III)]hexafluorophosphate (UM02). Both complexes were used as the blue emitter in OLED and LEG devices. We found that the optimized structure is ITO/PEDOT:PSS/complex:BMIMPF6(1:1)/Al. The UM01 gave a current efficiency of 1.14 cd A(-1), whereas the UM02 shows a better CIE coordination at 0.19, 0.40.
Funding Sponsor
Thailand Research Fund; Higher Education Commission; Ubon Ratchathani University [MEC5480005]; SAST
