Green-Light Photoresponsive Organic Field-Effect Transistor by PTCDA/Pentacene Heterojunction

摘要

The new organic photoelectric detector with great potential has been widely concerned and researched, especially for the photoresponsive organic field-effect transistor (photOFET). However, it is still rare for the researches on green-light photOFET. This paper aimed at green-light photOFET. The green-light photOFETs were fabricated by utilizing organic heterojunction based on PTCDA and pentacene. Under a green-light illumination (the wavelength is 532 nm), it exhibited a maximum photosensitivity of 56.15 (with power intensity of 16.5 mW/cm~2) and a maximum photoresponsivity of 19.62 A/W (with power intensity of 0.0033 mW/cm~2), which were greater than that of PTCDA single-layer photOFET. These results indicate that the heterojunction photOFET based on PTCDA and pentacene is proved to be a green-light pho-todetector with good performance.