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

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• 作者：Xuyong Yang ; Evren Mutlugun ; Cuong Dang ; Kapil Dev ; Yuan Gao ; Swee Tiam Tan ; Xiao Wei Sun ; Hilmi Volkan Demir
• 刊名：ACS Nano
• 出版年：2014
• 出版时间：August 26, 2014
• 年：2014
• 卷：8
• 期：8
• 页码：8224-8231
• 全文大小：562K
• ISSN：1936-086X

文摘

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鈥?00 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.

Keywords:

quantum dot; polyimide tape; flexibility; electroluminescence; light-emitting diodes