| Issue |
Eur. Phys. J. Appl. Phys.
Volume 41, Number 1, January 2008
|
|
|---|---|---|
| Page(s) | 29 - 32 | |
| Section | Microelectronics and Optoelectronics | |
| DOI | https://doi.org/10.1051/epjap:2007174 | |
| Published online | 19 December 2007 | |
https://doi.org/10.1051/epjap:2007174
Multilayer fluorescent polymer light emitting diode with low voltage and high efficiency
Université de Bordeaux, CNRS, Laboratoire IMS-UMR 5218, École Nationale Supérieure de Chimie et de Physique de Bordeaux, 16 Av. Pey Berland, 33607 Pessac Cedex, France
Corresponding author: lionel.hirsch@ims-bordeaux.fr
Received:
23
May
2007
Accepted:
15
October
2007
Published online:
19
December
2007
This study reports highly efficient green multilayer polymer light-emitting diodes (PLEDs). The fluorescent polymer is poly[(9,9-dioctyl-2,7-divinylene-fluorenylene)-alt-co-{2-methoxy-5-(2-ethyl-hexyloxy)-1,4-phenylene}] end capped with dimethylphenyl (ADS108GE). This emissive polymer has been found to behave as an electron transport emitter. A poly(N-vinylcarbazole) (PVK) layer has been introduced as both hole transporting layer/electron blocking layer. Thicknesses of both ADS108GE and PVK layers have been optimized. 3.1 lm/W have been achieved which corresponds to an improvement by a factor 2 comparing to devices without PVK. Luminances as high as 25 000 Cd/m2 at low operating voltage are reported.
PACS: 81.05.Hd – Other semiconductors / 85.30.De – Semiconductor-device characterization, design, and modeling / 85.60.Jb – Light-emitting devices
© EDP Sciences, 2007
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