A two-dimensional simulation of intrinsic top-contact field-effect transist
or is presented. The simulated structure is unique to organic transistors a
nd hence is most relevant. By time resolving the operation of such a transi
stor, the mechanisms underlying its operation are resolved. The effect of t
his device configuration on the measured "intrinsic" material properties is
also discussed and shown to explain previously reported features. (C) 2001
American Institute of Physics.