Researchers from Kookmin University, Korea Electronics Technology Institute (KETI), Kyung Hee University, and Pohang University of Science and Technology (POSTECH) have developed a high-performance fin-shaped light-emitting diode (fin-LED) leveraging face-selective dielectrophoretic self-assembly technology. This breakthrough, poised to revolutionize next-generation inorganic displays, was published in Nature Communications under the title “Development of fin-LEDs for next-generation inorganic displays using face-selective dielectrophoretic assembly.“
DOI: https://doi.org/10.1038/s41467-024-53965-0

Micro-LEDs as a Key Component in Next-Generation Displays
Micro-LEDs have emerged as a pivotal component in next-generation displays due to their high performance, extended lifespan, wide color gamut, strong modularity, and exceptional stability. Despite advancements, challenges persist. For instance, Samsung Display Corporation previously developed nanorod-based micro-LEDs (nanorod-LEDs) using inkjet printing and dielectrophoretic self-assembly techniques. However, these devices suffered from low brightness and suboptimal light extraction efficiency.
Fin-LED: A Revolutionary Approach to Enhanced Efficiency
To address these limitations, researchers proposed a fin-LED architecture optimized for dielectrophoretic self-assembly. This novel approach significantly improves brightness and light extraction efficiency. The production efficiency of fin-LED devices was exceptional, with a wafer utilization rate exceeding 90%, a vertical alignment rate of 91.3%, and a pixel production yield of 99.93%. Additionally, the blue-light fin-LED demonstrated an external quantum efficiency (EQE) of 9.1% and a brightness of 8640 cd/m² at 5.0V.
Future Prospects for Fin-LEDs in Inorganic Displays
The face-selective dielectrophoretic self-assembly technology underpinning fin-LEDs achieves high brightness, improved light extraction, and superior manufacturing yield. This innovation holds great promise for application in next-generation inorganic displays.
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