Highly Flexible, Electrically Driven, Top-Emitting, Quantum Dot Light-Emitting Stickers


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Yang X., Mutlugun E. , Dang C., Dev K., Gao Y., Tan S. T. , ...More

ACS NANO, vol.8, no.8, pp.8224-8231, 2014 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 8 Issue: 8
  • Publication Date: 2014
  • Doi Number: 10.1021/nn502588k
  • Title of Journal : ACS NANO
  • Page Numbers: pp.8224-8231

Abstract

Flexible information displays are key elements in future optoelectronic devices. Quantum dot light-emitting diodes (QLEDs) with advantages in color quality, stability, and cost-effectiveness are emerging as a candidate for single-material, full color light sources. Despite the recent advances in QLED technology, making high-performance flexible QLEDs still remains a big challenge due to limited choices of proper materials and device architectures as well as poor mechanical stability. Here, we show highly efficient, large-area QLED tapes emitting in red, green, and blue (RGB) colors with top-emitting design and polyimide tapes as flexible substrates. The brightness and quantum efficiency are 20 000 cd/m(2) and 4.03%, respectively, the highest values reported for flexible QLEDs. Besides the excellent electroluminescence performance, these QLED films are highly flexible and mechanically robust to use as electrically driven light-emitting stickers by placing on or removing from any curved surface, facilitating versatile LED applications. Our QLED tapes present a step toward practical quantum dot based platforms for high-performance flexible displays and solid-state lighting.