Abstract
Pb-phosphate glass-based optically transparent and light sensitive two composites, one containing C60-fullerene and the other single-walled carbon nanotubes (SWCNTs), have been prepared by melt-quenched technique, and their optical, electronic, and optoelectronic properties have been studied. Absorption studies of the SWCNT-composite show that the SWCNTs in this system suffer massive conformational deformations and as consequence band structure modulations. Conductivity measurements have revealed that the presence of SWCNTs in the host glass, which is basically an insulator, increases the conductivity of the host almost by hundred thousand times. UV–Vis light-induced absorption (LIA) and UV–Vis light-induced ESR (LIESR) studies in the case of C60-composite and similar LIESR and conductivity studies in the case of SWCNT-composite show that both the composites suffer a light-induced charge separation phenomenon, which involves electron transfer from the divalent (Pb2+)-center of the host to their respective electron acceptor (C60/SWCNT). Related charge transfer products are: Pb3+-holes and C60-anions in the case of the fullerene composite; and Pb3+-holes and conduction electron rich SWCNT anions in the case of the SWCNT-composite. The conductivity properties of the SWCNT-composite, suggest a possibility of its use as a transparent electrode, while the photo-induced charge—separation phenomenon of both the composites indicates prospect of their use as solar photo → current converter.
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Acknowledgments
The author gratefully acknowledges the grant-in-aid received from CSIR, India, under Emeritus Scientist Scheme in this work. He also thanks Dr. R. Sahoo, S. Balaji and S. Bose, who were involved at different phases of the work presented.
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Debnath, R. (2015). Packaging of Buckyballs/Buckytubes in Transparent Photo-Active Inorganic Polymers: New Hope in the Area of Electronics and Optoelectronics . In: Baillin, X., Joachim, C., Poupon, G. (eds) Nanopackaging: From Nanomaterials to the Atomic Scale. Advances in Atom and Single Molecule Machines. Springer, Cham. https://doi.org/10.1007/978-3-319-21194-7_10
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