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Compared with photodiodes, photosensitive organic field-effect transistors (photOFETs) have been widely investigated due to their higher sensitivity and lower noise levels in recent years1-3.We have designed and fabricated three kinds of photOFET.The performance of bottom-gate top-contact photOFET based on pentacene (Fig.1 a) for red light detection was greatly improved by introducing a C60 buffer layer between the Au source/drain electrodes and pentacene.