Surface modification of ZnMgO nanoparticles through changes in anchoring groups
발표자
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초록
내용
ZnMgO nanoparticles have a wide bandgap and high CBM level, and are used as an electron transport layer due to their moderate electron injection rate. However, green emission due to oxygen defects interferes with the light emitted from the EML, reducing the color purity of the QDs. In previous studies, carboxylic acid-based ligands with bidentate bonds were introduced into ZnMgO to alleviate the problem, but they faced a new problem that the ROOH groups were hydrolyzed and reduced the device performance. In this study, a new type of ligand with thiocarboxylic acid as an anchoring group was synthesized and introduced into ZnMgO nanoparticles. As a result, the strong binding power of the ROSH group solved the hydrolysis problem, and PL data proved that it was more suitable for reducing green emission. In addition, device tests were conducted to achieve optimal device performance.