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Issue 11, 2018
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Light-emitting diodes of colloidal quantum dots and nanorod heterostructures for future emissive displays

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Abstract

Tunable, narrow-linewidth photoluminescence with nearly ideal quantum yields and solution processability make colloidal quantum dots (QDs) a unique class of emitters for a variety of applications including light-emitting diodes (LEDs). Wide color gamut and high color saturation that can be achieved with QDs along with recent advances in QD-LEDs motivate their use as large-area, patternable electroluminescent materials especially in displays. In this review, critical issues in performance and long-term stability of QD-LEDs, Cd-free compositions necessary for practical applications, lower-symmetry heterostructures that impart new capabilities, and unconventional fabrication approaches are discussed. As the current CdSe-based QD-LEDs approach their performance limits, emerging nanorod heterostructures, as exemplified by the double heterojunction nanorods (DHNRs), can extend efficiencies beyond these limits. Furthermore, enhancements in device lifetime and light detection/photovoltaic capabilities using the same high-performance DHNR-LEDs can allow exciting prospects for novel emissive displays. Such multifunctional LEDs that can be solution-processed into large-area, mulitcolor pixel arrays may fundamentally alter how we perceive, interact with and utilize display devices.

Graphical abstract: Light-emitting diodes of colloidal quantum dots and nanorod heterostructures for future emissive displays

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Article information


Submitted
29 Dec 2017
Accepted
21 Feb 2018
First published
23 Feb 2018

J. Mater. Chem. C, 2018,6, 2618-2634
Article type
Review Article

Light-emitting diodes of colloidal quantum dots and nanorod heterostructures for future emissive displays

Y. Jiang, S. Cho and M. Shim, J. Mater. Chem. C, 2018, 6, 2618
DOI: 10.1039/C7TC05972H

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