| 초록 |
We prepared two quinoxaline-based small molecules with the intention of regulating the dipole moment in the molecule structure. The characteristics of two target molecules were investigated by utilizing three types of optoelectronic devices. Interestingly, the enhanced device properties with good long-term stability of the devices was achieved from optoelectronic devices, when the newly developed two materials were used as electron transporting layers (ETLs). This result can be attributed the efficient modulation of the work function of the electrode by controlling the interfacial dipole moment occurring at the electrode interface. In addition, the addition of ETL can fine tune the overall energy levels of the device, which can trigger more effective electron injection and extraction process. Therefore, this study can offer meaningful insights in the structure-property relationships of conjugated small molecules for developing organic ETLs. |
