| 초록 |
Highly effective ITO-free conductive polymer solar cells based on polypyrrole and multiwall carbon nanotubes (MWCNTs) grafted with poly(styrenesulfonic acid) (PPy/MWCNT-gr-PSSA) were developed to substitute for a polymeric anode from conventional poly(3,4-ethylenedioxy thiophene):poly(styrenesulfonate) (PEDOT:PSS). As compared with c-MWCNT, MWCNT-gr-PSSA provided better dispersion of MWCNT resulting in higher polymerization yield of PPy. The conductivity of flexible PPy/MWCNT-gr-PSSA film was optimized by molar ratio of PPy/MWCNT-gr-PSSA and the amount of various additives, such as polar solvents. The optimized conductivity was obtained with 5:5 molar ratio of PPy/MWCNT-gr-PSSA with addition of dimethylsulfoxide, which is better than that of commercial modified PEDOT:PSS(PH500). Because of the potential of relatively low cost, it should be an important addition to the related research area. This research was supported by the National Research Foundation (Project. 2009-0066814). |
