Innovative Fluid Self-Assembly Method
According to reports, a collaborative research effort between Kookmin University and Kyung Hee University in South Korea has successfully improved Micro LED performance through a fluid self-assembly method based on chemical linking agents and chelation bonds. The study indicates that assembly efficiency has increased by 61.8% compared to previous methods. The vertically assembled 1.3-micrometer Micro LEDs achieved a peak external quantum efficiency (EQE) of 8.1% and a brightness of 22,300 nits at a voltage of 9V.
New Approach to Selective Vertical Assembly
The researchers developed a new method utilizing a chemical linking agent capable of forming metal chelation interactions within zinc metal complexes to achieve face-selective vertical assembly of Micro LEDs.
Step-by-Step Process
This novel process consists of three main steps:
- Self-Assembled Monolayer (SAM) Treatment: The p-GaN surface and bottom Au layer of the Micro LEDs are treated with gly-thiol using the SAM method.
- Zinc Precursor Treatment: Various zinc precursors are applied to the gly-thiol-treated bottom Au electrodes to form metal chelation coordination bonds.
- Vertical Self-Assembly: Finally, the gly-thiol-treated Micro LEDs are vertically self-assembled through the chelation bonds.
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