| 초록 |
Modification of inorganic electrodes has attracted much attention in the study of organic semiconductor. Self-assembled monolayers (SAMs) are in the limelight as new tools for enhancing the macroscopic bulk properties and molecular properties of functional materials. SAM method can improve poor adhesion between organic and inorganic electrodes like buffer layer. Carbazole is a compound which has been the subject of many studies, due to its photo-conductive properties and its ability to form charge-transfer complexes as well as its inherent electro-donating nature arising from the nitrogen atom through the conjugated aromatic rings. An ethoxysilane functionalized hole-transporting material (Carbazole–CONH–silane) was synthesized and was self-assembled to form a monolayer on an indium tin oxide (ITO) anode. The modified material was characterized using Fourier transfer infrared spectrometer(FT-IR), Electroluminescence spectroscopy (EL), Atomic Force Microscopy (AFM) and Cyclic Voltammetry (CV). The SAM-modified device showed a lower turn voltage than that of its corresponding device (ITO/TPD/Alq3) without SAM.
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