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

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 QLE...

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Bibliographic Details
Published in:ACS nano 2014-08, Vol.8 (8), p.8224-8231
Main Authors: Yang, Xuyong, Mutlugun, Evren, Dang, Cuong, Dev, Kapil, Gao, Yuan, Tan, Swee Tiam, Sun, Xiao Wei, Demir, Hilmi Volkan
Format: Article
Language:English
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Summary: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/m2 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.
ISSN:1936-0851
1936-086X
DOI:10.1021/nn502588k