期刊
ACS PHOTONICS
卷 10, 期 7, 页码 2192-2200出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.2c00863
关键词
QLED; flexible; top-emitting; microcavity; blade-coating
类别
资金
- [62174067]
- [62175085]
- [61905086]
- [20200201296JC]
- [XJ2020028]
This study proposes a strategy combining a top-emitting structure, optical microcavity optimization, and large-scale film preparation to achieve flexible, efficient, and large-area QLEDs. It also demonstrates a 1.3-inch passive-matrix flexible QLED display with 19x19 pixels.
Flexible displays are essential to provide information in real time for human-machine interactions. As a next-generation display technology, quantum-dot light-emitting diodes (QLEDs) are potentially serving as key components for flexible displays. However, it is still challenging for QLEDs to simultaneously achieve flexibility, large-scale production, and high efficiencies. To this end, a strategy is proposed here by combining a top-emitting structure, optical microcavity optimization, and large-scale film preparation. A top emitting microcavity with semitransparent and reflective metals is designed to achieve flexibility, efficient carrier injection, and high light extraction efficiency. Precision manufacturing of large-area QLEDs with the designed top-emitting microcavity is achieved by combining surfactant-assisted blade-coating and vacuum thermal evaporation processes. With this strategy, a large-area flexible QLED with an active area of 400 mm2 and a maximum external quantum efficiency of 21.8% is developed. This strategy provides a promising approach toward the development of flexible displays with the demonstration of a 1.3 in. passive-matrix flexible QLED display of 19 by 19 pixels.
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