Surface Modification of ZnMgO Nanoparticles With Beta-Diketone Based Ligands
발표자
()
초록
내용
Zinc oxide is often used as an electron transport layer in ElectroLuminescent Devices because it has high electron affinity, high electron mobility, and a wide bandgap. However, it has poor dispersion stability and faster electron mobility than the hole transport layer, which leads to Auger recombination and low efficiency. By doping Mg into ZnO, the electron mobility can be controlled by adjusting the CBM level and band gap. In this study, we found a suitable Mg doping ratio and demonstrated that the 8.5:1.5 ratio is the most appropriate. However, ZnMgO suffers from surface defects that reduce device performance and difficult solution processing. We improved the surface defects of ZnMgO by exchanging beta-diketone-based ligands, which made the solution process easier and improved the device performance. This approach was successfully validated to minimize surface defects and achieve optimal device performance of ZnMgO-based electron transport materials.