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Yb:MoO3/Ag/MoO3 Multilayer Transparent Top Cathode for Top-Emitting Green Quantum Dot Light-Emitting Diodes
- Source :
- Nanomaterials, Volume 10, Issue 4, Nanomaterials, Vol 10, Iss 663, p 663 (2020)
- Publication Year :
- 2020
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2020.
-
Abstract
- In this study, we report on the application of a dielectric/ultra-thin metal/dielectric (DMD) multilayer consisting of ytterbium (Yb)-doped molybdenum oxide (MoO3)/silver (Ag)/MoO3 stacked as the transparent cathode in top-emitting green quantum dot light-emitting diodes (QLED). By optimizing the Yb doping ratio, we have highly improved the electron injection ability from 0.01 to 0.35. In addition, the dielectric/ultra-thin metal/dielectric (DMD) cathode also shows a low sheet resistance of only 12.2 &Omega<br />/sq, which is superior to the resistance of the commercially-available indium tin oxide (ITO) electrode (~15 &Omega<br />/sq). The DMD multilayer exhibits a maximum transmittance of 75% and an average transmittance of 70% over the visible range of 400&ndash<br />700 nm. The optimized DMD-based G-QLED has a smaller current leakage at low driving voltage. The optimized DMD-based G-QLED enhances the current density than that of G-QLED with indium zinc oxide (IZO) as a cathode. The fabricated DMD-based G-QLED shows a low turn-on voltage of 2.2 V, a high current efficiency of 38 cd/A, and external quantum efficiency of 9.8. These findings support the fabricated DMD multilayer as a promising cathode for transparent top-emitting diodes.
- Subjects :
- Ytterbium
Materials science
General Chemical Engineering
chemistry.chemical_element
02 engineering and technology
Dielectric
01 natural sciences
Article
law.invention
lcsh:Chemistry
law
0103 physical sciences
DMD
QLEDs
General Materials Science
Sheet resistance
Diode
010302 applied physics
business.industry
transparent cathode
021001 nanoscience & nanotechnology
Cathode
Indium tin oxide
top-emission
lcsh:QD1-999
chemistry
Optoelectronics
Quantum efficiency
0210 nano-technology
business
Light-emitting diode
Subjects
Details
- Language :
- English
- ISSN :
- 20794991
- Database :
- OpenAIRE
- Journal :
- Nanomaterials
- Accession number :
- edsair.doi.dedup.....8b76e957b01475b030bc94dfadc83df0
- Full Text :
- https://doi.org/10.3390/nano10040663