Active organic semiconductor devices and methods for making the same
View Patent ↗Techniques for disposing an organic semiconductor film on a receiver substrate, comprising the steps of: depositing an organic semiconductor film onto a donor substrate, the semiconductor film having a first surface facing the donor substrate and having an exposed second surface; bringing the exposed second surface adjacent a receiver substrate such that the semiconductor film is in contact with both substrates; and then, moving the donor and receiver substrates apart; and wherein a surface portion of the receiver substrate is maintained above its glass transition during the moving step. Active organic semiconductor devices.
1. An active organic semiconductor device comprising:
a receiver substrate; and
an organic semiconductor film on the said receiver substrate, the semiconductor film including a first surface having a first root mean square roughness and being on the receiver substrate, the semiconductor film also including a second surface having a second root mean square roughness and facing away from the receiver substrate;
wherein the second root mean square roughness is less than the first root mean square roughness.
2. The active organic semiconductor device of claim 1 , in which the second surface has a root mean square roughness within a range of between about 1 nanometer and about 2 nanometers.
3. The active organic semiconductor device of claim 1 , in which the semiconductor film has a charge carrier mobility of at least about 0.001 square centimeters per volt second.
4. The active organic semiconductor device of claim 1 , in which the semiconductor film is discontinuous.
5. The active organic semiconductor device of claim 1 , in which the receiver substrate has a composition including poly(butylmethacrylate), polymethylacrylate, polymethoxyethylmethacrylate, or a combination including two or more of the foregoing.
6. The active organic semiconductor device of claim 1 , in which the receiver substrate has a composition including an acrylate, a methacrylate, or including both in combination.
7. The active organic semiconductor device of claim 1 , in which the receiver substrate has a composition including a thermoplastic polymer.
8. The active organic semiconductor device of claim 1 , in which the receiver substrate is configured as a gate insulator.
9. The active organic semiconductor device of claim 1 , in which the receiver substrate has a glass transition occurring at a temperature within a range of between about 280° Kelvin and about 300° Kelvin.