Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5465993 | Thin Solid Films | 2017 | 7 Pages |
Abstract
Three blue materials based on diphenylamino dibenzo[g,p]chrysene were designed and synthesized via Buchwald-Hartwig amination. To characterize their electroluminescent properties, multilayered organic light emitting diodes (OLEDs) were fabricated with the following device structure: indium tin oxide (ITO) (180Â nm)/4,4â²,4â³-tris[2-naphthyl(phenyl)amino]triphenylamine (2-TNATA) (40Â nm)/N,Nâ²-diphenyl-N,Nâ²-(1-napthyl)-(1,1â²-phenyl)-4,4â²-diamine (NPB) (10Â nm)/2-methyl-9,10-di(naphthalen-3-yl)anthracene (mADN): 3 or 7% blue dopants (20Â nm)/tris-(8-hydroxyquinoline)aluminum (Alq3) (30Â nm)/lithium quinolate (Liq) (2Â nm)/Al (100Â nm). All the devices showed blue emission with high electroluminescent efficiencies. Particularly, a device using 2-methyl-9,10-di(naphthalen-3-yl)anthracene as the host material and 3,6-di[4â²-(1-di(tert-butyl))phenyl]-11,14-bis(diphenylamino) dibenzo[g,p]chrysene (2) as the dopant material at 3% doping exhibited highly efficient blue emission with an external quantum efficiency of 4.72% at 20Â mA/cm2.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Sujin Jeong, Se Hyun Kim, Dong Young Kim, Changmin Kim, Ho Won Lee, Song Eun Lee, Young Kwan Kim, Seung Soo Yoon,