| 초록 |
In this study, the effects of ligands on the surface of quantum dots (QDs) were investigated on the perspective of Quantum Dot Light-Emitting Diodes (QLEDs). In optoelectronic device properties, ligand on the QD plays a key role for appropriate injection and charge balance to the Emissive Material Layer (EML) with the other materials such as Hole Transport Layer (HTL) and Electron Transport Layer (ETL). Herein, 2,2’-Dipyridyl was selected as the ligand for modification which is found to be effective and exchangeable. 2,2’-Dipyridyl possess Highest occupied Molecular Orbital (HOMO) and Lowest Unoccupied Molecular Orbital (LUMO) of -6.35 eV and -1.32 eV ensuring better hole movement into the EML from the HTL. Therefore, 2,2’-Dipyridyl was placed onto the interface of the HTL and QDs by spin-coating method. Optical characteristics of the synthesized QDs and device properties of QLED with pyridine 2,2’-Dipyridyl was compared. |
