Studies of charge transfer processes across donor-acceptor interface using a field effect transistor geometry

The existence of donor- type polymer field effect transistors (FETs), which are FETs exhibiting p- type characteristics and acceptor- type molecular FETs with n- type characteristics, provide an interesting possibility of a combined active bilayer system, especially under photoexcitation. We present a device structure and methodology that is conducive to study donor- acceptor interfacial processes using a FET platform. The changes in FET characteristics initiated by the photogenerated carriers in the donor coated acceptor device are studied using steady state and pulsed photoexcitation