Colloidal quantum dot (QD) based light-emitting diodes (QLEDs) have been attracted attention as a promising candidate following organic light-emitting diodes, because of their superb optical properties such as narrow spectral bandwidths (FWHM ~30 nm), high external quantum efficiency (~20%), and solution processibility. This proceeding describes recent progress on the device structures and fabrication processes of QLEDs for their potential application to displays and lighting sources. Designing novel device architectures to improve device efficiency and stability, as well as to simplify the solution-based QD patterning processes will be also discussed.
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