Fullerenes electrical transport

Carbon (element No. 6 in the periodic table) forms a variety of materials, including graphite, diamond, carbon fibers, charcoal, as well as newly discovered nanocarbon materials, such as fullerene, graphene, carbon nanotube, and graphene nanoribbon (GNR). Even though all are composed of the same atoms, different carbon materials can show very different physical and chemical properties, including electrical transport, optical and thermal properties, and chemical reactivity, depending on their structures. 

Nalwa HS, "Handbook of Organic Conductive Molecules and Polymers", Vol. 1, "Charge-Transfer Salts, Fullerenes and Photoconductors" Vol. 2, "Conductive Polymers Synthesis and Electrical Properties" Vol. 3, "Conductive Polymers Spectroscopy, Photo-Physics and Applications" Vol. 4, "Conductive Polymers Transport and Physical Properties", Wiley, Chichester, 1997. 

Contents v. 1. Charge-transfer salts, fullerenes, and photoconductors—v. 2. Conductive polymers synthesis and electrical properties— v. 3. Conductive polymers spectroscopy and physical properties—v. 4. Conductive polymers transport, photophysics and applications. 

Fig. 7.3 Electronic state diagram and (in horizontal perspective) schematic charge photogeneration and transport in a polymer fullerene photovoltaic cell. The migration of the exciton to the BHJ generates a CT exciton that may dissociate into free charge carriers, recombine to the ground state or intersystem cross to the triplet exciton (not shown in this figure). Chaige separation is believed to occur from a hot exciton, in competition with its thermalisation. The built-in electric field created by the electrode work function differential drives the electrons to the cathode and the holes to the anode...

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