| 초록 |
We report a new casting method, thickness controlled drop casting (TCDC) to induce bulk properties of conducting polymer thin films for making a flexible polymer electrode with high conductivity and transmittance. An absence of external centrifugal force during film forming process in TCDC method allows polymer chains to have longer relaxation time, and consequently leads better alignment of polymer chains resulting an enhanced conductivity. Polyaniline doped with camphor sulfonic acid (PANI:CSA) electrode casted by TCDC method exhibits a constant conductivity under a variety of film thickness. The electrode shows high optical transmittance of about 85 % at 550 nm and a sheet resistance of ~ 90 ohm cm-2. Furthermore, the PANI:CSA electrode from the TCDC method have been successfully used in flexible polymer electronic devices as a flexible anode. The devices from the TCDC method represent better device performances with lower internal resistance than spin-cast devices. |
