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

9 Citations (Scopus)


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
Issue number7
Publication statusPublished - 2017 Jan 1


All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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