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

Hong Hee Kim, Jae Won Shim, Young Jun You, Yeon Ju Lee, Cheolmin Park, Do Kyung Hwang, Won Kook Choi

Research output: Contribution to journalArticle

7 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1596-1600
Number of pages5
JournalJournal of Materials Chemistry C
Volume5
Issue number7
DOIs
Publication statusPublished - 2017 Jan 1

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Polyurethanes
Semiconductor quantum dots
Light emitting diodes
Polyvinyl Alcohol
Polyvinyl alcohols
Substrates
Buffer layers
Color
Light emission
Tin oxides
Indium
Luminance
Lighting
Display devices
Fabrication
Electric potential

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

Cite this

Kim, Hong Hee ; Shim, Jae Won ; You, Young Jun ; Lee, Yeon Ju ; Park, Cheolmin ; Hwang, Do Kyung ; Choi, Won Kook. / Highly flexible inverted-quantum-dot light-emitting diodes on elastic polyurethane substrates. In: Journal of Materials Chemistry C. 2017 ; Vol. 5, No. 7. pp. 1596-1600.
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Highly flexible inverted-quantum-dot light-emitting diodes on elastic polyurethane substrates. / Kim, Hong Hee; Shim, Jae Won; You, Young Jun; Lee, Yeon Ju; Park, Cheolmin; Hwang, Do Kyung; Choi, Won Kook.

In: Journal of Materials Chemistry C, Vol. 5, No. 7, 01.01.2017, p. 1596-1600.

Research output: Contribution to journalArticle

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