Abstract
Doping effects of conducting polymer (CP)-C 60 composites by n-type dopants, namely, by alkali metals, are investigated, emphasizing the electron spin resonance (ESR) spectroscopy together with conductivity changes upon K-doping of poly(3-alkylthiophene) (PAT)-(C 60) y composites at various fullerene concentrations y. The ESR shows two types of lines: one from polarons on PAT chains, and the other from K 3C 60 clusters and monomolecular C 60 radicals. The evolution of conductivity suggests that, at comparatively large C 60 content y = 0.05, the composite can be viewed as a network of C 60 clusters in the PAT host matrix at the initial K-doping stage. K 3C 60 metallic islands are formed, while the PAT matrix is still insulating so that increase of conductivity is slower than in the pure PAT case. These results are consistent with the granular nature of superconducting phases found by us in PAT(C 60) y K x at y ≥ 0.005 by low-field microwave absorption (LFMA).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
