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Ideal nanocrystal quantum dots for light-emitting diodes
Ideal nanocrystal quantum dots for light-emitting diodes
- Source :
- Organic and Hybrid Light Emitting Materials and Devices XXV.
- Publication Year :
- 2021
- Publisher :
- SPIE, 2021.
-
Abstract
- Semiconductor nanocrystal core/shell quantum dots (QDs) have successfully extended their original fundamental research into many practical applications. But core/shell QDs may still not satisfying enough in practical applications because of the existence of photoblinking, multi-exponential PL decay behavior, and Forster resonance energy transfer (FRET) between QDs. Herein we report an approach to synthesize a series of alloyed core/shell QDs by a “low-temperature injection and high-temperature growth” precisely controlled method. By probing shell-thickness dependent performance, ZnCdSe-based core/shell QDs not only with nonblinking but also single photoluminescence decay channel and suppressed FRET have been successfully prepared. As emitters, such ZnCdSe- based QLEDs exhibit high external quantum efficiencies, low-efficiency roll-off at high current density, and long operational lifetime.
- Subjects :
- Photoluminescence
Materials science
Condensed Matter::Other
business.industry
Shell (structure)
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
law.invention
Core (optical fiber)
Condensed Matter::Materials Science
Förster resonance energy transfer
Nanocrystal
Quantum dot
law
Optoelectronics
business
Quantum
Light-emitting diode
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Organic and Hybrid Light Emitting Materials and Devices XXV
- Accession number :
- edsair.doi...........9a6dac2d65314b3e3a281f8026aa606f
- Full Text :
- https://doi.org/10.1117/12.2594049