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Issue 7, 2017
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Highly flexible inverted-quantum-dot light-emitting diodes on elastic polyurethane substrates

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Abstract

Fabrication of highly flexible, inverted, indium tin oxide (ITO)-free top-emitting quantum-dot light-emitting diodes (QDLEDs) on elastic polyurethane (PU) substrates is reported here. To cope with the irregular surfaces of the PU substrate, polyvinyl alcohol (PVA) is used as a buffer layer. By adopting the PVA buffer layer, we demonstrate red-color and green-color top-emitting QDLEDs that show turn-on voltages from 4.0 V to 4.5 V, and maximum luminance values of 1200 cd m−2 (red) and 4800 cd m−2 (green). In addition, when the QDLEDs are stuck on the curved surfaces (vials and a tumbler), the devices still exhibit a clear light emission. These highly flexible QDLEDs can pave the way for further development of next-generation wearable or attachable displays, or solid-state lighting.

Graphical abstract: Highly flexible inverted-quantum-dot light-emitting diodes on elastic polyurethane substrates

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Article information


Submitted
04 Oct 2016
Accepted
17 Jan 2017
First published
19 Jan 2017

J. Mater. Chem. C, 2017,5, 1596-1600
Article type
Communication

Highly flexible inverted-quantum-dot light-emitting diodes on elastic polyurethane substrates

H. H. Kim, J. W. Shim, Y. You, Y. J. Lee, C. Park, D. K. Hwang and W. K. Choi, J. Mater. Chem. C, 2017, 5, 1596
DOI: 10.1039/C6TC04310K

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