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This paper demonstrates all-carbon photovoltaic devices made of amorphous carbon (a-C) and C 60 thin films. C 60 film is deposited by the sublimation in vacuum and a-C film is synthesized by exposing N 2 radicals to C 60 during the deposition. C 60 is converted into a-C when the rf power is larger than 150W and the optical band gap decreases with increasing the power. Photovoltaic properties of device with the structure of Al/C 60 /a-C/indium tin oxide/glass are presented. It is shown that the present cell has a strong spectral response in the wavelength range shorter than 550nm and a small response at around 620nm.