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Nano-arrayed OLEDs: enhanced outcoupling efficiency and suppressed efficiency roll-off
- Source :
- Nanoscale. 10:19330-19337
- Publication Year :
- 2018
- Publisher :
- Royal Society of Chemistry (RSC), 2018.
-
Abstract
- Organic light-emitting diodes (OLEDs) with an enhanced outcoupling efficiency and a suppressed efficiency roll-off were fabricated by inserting a nanosize pixel-defining layer (nPDL) that defines the OLED emission region as an array of nanoholes. The outcoupling efficiency of the nano-arrayed OLEDs was increased through the reduced surface plasmon polariton loss caused by the wavy diffraction grating at the metal–organic interface, and their efficiency roll-off was suppressed through the diffusive exciton outside the exciton-formation zone. As a result, the nano-arrayed OLEDs exhibited enhancements of 148.7% in the power efficiency and 137.0% in the external quantum efficiency at 1000 cd m−2 compared with a reference device. Furthermore, the critical current density (J0) where the external quantum efficiency decreased to half of its initial value was improved by a factor of 2.5.
- Subjects :
- 010302 applied physics
Materials science
business.industry
Exciton
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Surface plasmon polariton
0103 physical sciences
Nano
OLED
Optoelectronics
General Materials Science
Quantum efficiency
0210 nano-technology
business
Diffraction grating
Electrical efficiency
Diode
Subjects
Details
- ISSN :
- 20403372 and 20403364
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- Nanoscale
- Accession number :
- edsair.doi.dedup.....902867d6b4859786c4a5afc80d85931a