Photovoltaic devices based on interpenetrating blends of semiconducting oli
gomer and C-60 are investigated in terms of performance and morphology. Dev
ices prepared in two different ways are examined, one where oligomer deposi
tion is followed by C-60 deposition (schematically shown on the left hand s
ide of the Figure), the other where oligomer and C-60 are codeposited (see
Figure, right).