Fig. 13 (a) Schematic of the SWNT/Si solar cell with dimensional parameters. (b) Magnified SEM image of contact window edge of the SWNT/Si solar cell. A region of the SWNT film with the width of 300 nm was suspended between the Si substrate and the Pt electrode. d) J-V characteristics of the SWNT/Si solar cell measured immediately as well as after 1, 6 and 10 months exposed in the ambient condition.