New Anchoring Group for Surface Engineering of Inorganic Nanoparticles
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초록
내용
Nanoparticles are extensively utilized in electroluminescence-quantum dot (EL-QD) due to their high luminescence efficiency, tunable optical properties, high electron mobility, and wide bandgap. However, they face the problem of poor performance due to surface defects. The most commonly used ligand anchoring groups in inorganic nanoparticles include carboxylic acid, thiol, and silanes. Carboxylic acid has the disadvantages of hard to control binding modes and dehydration, thiol has slow kinetic and binding mechanisms not clear, and silanes have hard to control polymerization. We introduced a ligand with a new anchoring group, which enables fast and stable binding, prevents nanoparticles from aggregating, improves dispersion stability, increases luminescence efficiency, and prolongs device lifetime. Surface modification of this ligand to the emissive layer resulted in a 10% increase in luminance with improved external quantum efficiency and quantum yield.