| 초록 |
The threshold voltages of organic thin-flm transistors (oTFTs) were easily controlled by modifying the bottom-contact electrodes with an ultrathin polymeric layer deposited via initiated-chemical vapor deposition (iCVD). The inserting polymer, which is poly dimethyl aminomethyl styrene (pDMAMS), is physisorbed on the various metal surfaces, and reduces the work functions (WFs) of them. Due to its universal WF-reducing property, highly reduced threshold voltages and enhanced field effect mobilities were achieved in n-channel (C60) oTFTs with various channel-electrodes. The improvements can be attributed to the significantly facilitated charge injection from the channel electrodes to the C60, and this correlates well with highly decreased contact resistance in the devices. These results demonstrate that the ultrathin iCVD polymeric layer can be universally applied to other organic electronic devices without any solvent contamination and damages of previously deposited materials. |
