Surface Modification of ZnO Using Organic Ligands to Improve Device Performance of EL-QD
발표자
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초록
내용
ZnO is a very suitable material as an electron transport layer because it has high transparency, electron mobility, and low work function properties. However, an oxygen defect occurs during synthesis, which not only dramatically increases electron mobility, but also emits fluorescence in the green region. Applying this to the light emitting element has the effect of reducing efficiency and reducing color purity. In addition, due to low dispersion stability, processability is also reduced, and this includes low dispersion stability of inorganic nanoparticles in organic solvents and poor device processability. To avoid this problem, a new ligand has been designed and applied to inorganic nanoparticles. Our approach achieves high dispersion stability for light-emitting quantum dots(EL-QD) and ZnO-based electron transport materials and reduces oxygen defects on the surface, ultimately improving the performance of EL-QD devices.