Highly flexible inverted-quantum-dot light-emitting diodes on elastic polyurethane substrates. Issue 7 (30th January 2017)

• Record Type: Journal Article
• Authors: Kim, Hong Hee; Shim, Jae Won; You, Young-Jun; Lee, Yeon Ju; Park, Cheolmin; Hwang, Do Kyung; Choi, Won Kook
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 7(2017)
• Page Start: 1596
• Page End: 1600
• Publication Date: 2017-01-30
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6tc04310k
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Highly flexible inverted QDLEDs are fabricated using elastic PU substrates, which stuck on the curved surfaces still operate well without any serious degradation. 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.