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1 August 2021 Ideal nanocrystal quantum dots for light-emitting diodes
Lei Wang, Ruili Wu, Huaibin Shen, Lin Song Li
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Proceedings Volume 11808, Organic and Hybrid Light Emitting Materials and Devices XXV; 118081G (2021) https://doi.org/10.1117/12.2594049
Event: SPIE Organic Photonics + Electronics, 2021, San Diego, California, United States
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 Förster 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.
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Lei Wang, Ruili Wu, Huaibin Shen, and Lin Song Li "Ideal nanocrystal quantum dots for light-emitting diodes", Proc. SPIE 11808, Organic and Hybrid Light Emitting Materials and Devices XXV, 118081G (1 August 2021); https://doi.org/10.1117/12.2594049
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KEYWORDS
Light emitting diodes
Nanocrystals
Quantum dots
Zinc
Resonance energy transfer
Cadmium
Diodes
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