Issue 11, 2018

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

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

Article information

Article type
Review Article
Submitted
29 Dec. 2017
Accepted
21 Febr. 2018
First published
23 Febr. 2018

J. Mater. Chem. C, 2018,6, 2618-2634

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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