OSIT ITO/Pentacene/Al/Pentacene/Au under negative VDS and VG is characterized.
Current saturation effect of the pentacene OSIT under negative VDS and VG is seen.
VON moved to larger negative voltages with increasing negative VG.
The movement step of VG gets smaller after keeping the device for enough time.
The possible mechanisms for such a kind of current modulation are discussed.