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Highly Efficient Phosphorescent Light-Emitting Diodes by Using New Host Material.
- Source :
-
Journal of nanoscience and nanotechnology [J Nanosci Nanotechnol] 2016 Mar; Vol. 16 (3), pp. 2876-9. - Publication Year :
- 2016
-
Abstract
- An electron-transporting triazole (Tz) and hole transporting carbazole (Cz) moieties were introduced into the fluorene structure via a Suzuki coupling reaction. The resulting material, 9-(4'-(9-(4'-(4,5-diphenyl-4H-1,2,4-triazol-3-y)-[1,1'-biphenyl]-4-yl)-9H-fluoren-9-yl)-[1,1'-biphenyl]-4-yl)-9H-carbazole (Tz-FL-Cz), was synthesized and can be used as the host layer in phosphorescent OLEDs. The synthesized material exhibits wide energy gap (3.46 eV). The absorption and emission maximum of the Tz-FL-Cz was observed at 300 nm and 389 nm, respectively. Blue phosphorescent devices using Tz-FL-Cz as host material exhibited maximum current efficiency of 3.2 cd/A and power efficiency of 1.3 lm/W, respectively.
- Subjects :
- Luminescence
Spectrophotometry, Ultraviolet
Light
Subjects
Details
- Language :
- English
- ISSN :
- 1533-4880
- Volume :
- 16
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Journal of nanoscience and nanotechnology
- Publication Type :
- Academic Journal
- Accession number :
- 27455724
- Full Text :
- https://doi.org/10.1166/jnn.2016.11050