期刊
NANO RESEARCH
卷 15, 期 7, 页码 6477-6482出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-022-4204-y
关键词
quantum-dot light-emitting diode (QLEDs); organic light-emitting diode; blue common layer; full-color display; reduced process step
类别
资金
- Technology Innovation Program - Ministry of Trade, Industry & Energy (MOTIE, Korea) [20010371, 20010737]
- Industrial Core Technology Development Program - Ministry of Trade, Industry & Energy (MOTIE, Korea) [10077471]
In this study, a novel concept of QD-organic hybrid light-emitting diodes (QLEDs) is presented, which improves the performance of QLEDs and simplifies the manufacturing process, leading to higher resolution and full-color displays.
Colloidal quantum-dot (QD) light-emitting diodes (QLEDs) have been in the forefront of future display devices due to their outstanding optoelectronic properties. However, a complicated solution-process for patterning the red, green, and blue QDs deteriorates the QLED performance and limits the resolution of full-color displays. Herein, we report a novel concept of QD-organic hybrid light-emitting diodes by introducing an organic blue common layer (BCL) which is deposited through a common mask over the entire sub-pixels. Benefitted from the optimized device structure, red and green QLEDs retained their color coordinates despite the presence of the BCL. Furthermore, adopting the BCL improved the external quantum efficiency of green and red QLEDs by 38.4% and 11.7%, respectively, due to the FOrster resonance energy transfer from the BCL to the adjacent QD layers. With the BCL structure, we could simply demonstrate a full-color QD-organic hybrid device in a single substrate. We believe that this device architecture is practically applicable for easier fabrication of solution-processed, high-resolution, and full-color displays with reduced process steps.
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