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We report on the multiwall carbon nanotube application as energy conversion material to fabricate thin film solar cells, with nanotubes acting as photogeneration sites as well as charge separators, collectors and carrier transporters. The device consists of a semitransparent thin film of nanotubes coating a n-type crystalline silicon substrate. Under illumination electron–hole (e–h) pairs, generated in the nanotubes and in the silicon substrate underneath, are split and charges are transported through the nanotubes (electrons) and the n-Si (holes). We found that a suitable thickness of the nanotube thin film, high density of Schottky junctions between nanotubes and n-Si and lowest number of nanotube walls are all fundamental parameters to improve the device incident photon to electron conversion efficiency. Multiwall carbon nanotubes have been synthesized by chemical vapour deposition in an ultra high vacuum …
American Scientific Publishers
Publication date: 
1 Oct 2011

Paola Castrucci, Silvano Del Gobbo, Luca Camilli, Manuela Scarselli, S Casciardi, F Tombolini, A Convertino, G Fortunato, Maurizio De Crescenzi

Biblio References: 
Volume: 11 Issue: 10 Pages: 9202-9207
Journal of nanoscience and nanotechnology