Semiconducting devices and methods of preparing
An amic acid or amic ester precursor can be applied to a substrate to form a thin film, and is then thermally converted into a semiconducting layer of the corresponding arylene diimide. This semiconducting thin film can be used in various articles including thin-film transistor devices that can be incorporated into a variety of electronic devices. In this manner, the arylene diimide need not be coated onto the substrate but is generated in situ from a solvent-soluble, easily coated precursor compound.
1. A thin-film transistor device comprising a gate dielectric layer, a gate electrode, a source electrode, a thin organic semiconductor film, and a drain electrode,
wherein the dielectric layer, the gate electrode, the thin film of organic semiconductor material, source electrode, and the drain electrode are in any sequence as long as the gate electrode and thin organic semiconductor film both contact the dielectric layer, and the source electrode and the drain electrode both contact the thin film of the organic semiconducting composition, and
wherein the thin organic semiconductor film is continuous and polycrystalline and comprises an arylene diimide compound that is the product from thermal dehydration imidization conversion of an amic acid or amic ester precursor thereof.
2. The device of claim 1 comprising:
a plurality of the electrically conducting gate electrodes disposed on a substrate,
the gate dielectric layer disposed on the electrically conducting gate electrodes,
the thin organic semiconductor film disposed on the dielectric layer substantially overlapping the gate electrodes, and
a plurality of sets of the source electrodes and drain electrodes disposed on the thin organic semiconductor film such that each of the sets is in alignment with each of the gate electrodes.
3. The device of claim 1 wherein the arylene diimide compound is the thermal dehydration imidization product of an arylene tetracarboxylic acid or ester precursor that is represented by the following Structure (I):
wherein Ar is an anthracene, naphthalene, or perylene nucleus and the four carbonyl groups are attached directly to peri carbon atoms, A 1 is an aryl, heteroaryl, alkyl, fluoroalkyl, cycloalkyl, or heterocyclyl group, and R is hydrogen or an alkyl or cycloalkyl group that is the same or different as that defined for A 1 .
4. The device of claim 3 wherein Ar is naphthalene or perylene, Ar 1 is a non-aromatic alkyl, alkylaryl, fluoroalkyl, alkylphenyl, phenyl, or cycloalkyl group, and R is hydrogen or a methyl or ethyl group.
5. The device of claim 1 wherein the arylene diimide compound is the thermal dehydration imidization product of an arylene tetracarboxylic acid or ester precursor that is represented by the following Structure (II):
wherein Ar is an anthracene, naphthalene, or perylene nucleus and the four carbonyl groups are attached directly to peri carbon atoms, A 1 and A 2 are independently aryl, heteroaryl, alkyl, fluoroalkyl, cycloalkyl, or heterocyclyl groups, and R is hydrogen or an alkyl or cycloalkyl group that is the same or different as that defined for A 1 and A 2 .
6. The device of claim 5 wherein Ar is naphthalene or perylene, and A 1 and A 2 are independently non-aromatic alkyl, alkylaryl, fluoroalkyl, alkylphenyl, phenyl, or cycloalkyl groups, and R is hydrogen or a methyl or ethyl group.
7. The device of claim 1 wherein the arylene diimide compound is the thermal dehydration imidization product of an arylene tetracarboxylic acid or ester precursor that is represented by the following Structure (III):
wherein Ar is an anthracene, naphthalene, or perylene nucleus and the four carbonyl groups are attached directly to peri carbon atoms, A 1 is an aryl, heteroaryl, alkyl, fluoroalkyl, cycloalkyl, or heterocyclyl group, and R is hydrogen or an alkyl or cycloalkyl group that is the same or different as that defined for A 1 .
8. The device of claim 7 wherein Ar is naphthalene or perylene, and A 1 is a non-aromatic alkyl, alkylaryl, fluoroalkyl, alkylphenyl, phenyl, or cycloalkyl group.
9. The device of claim 1 wherein the arylene diimide compound is present in the thin organic semiconductor film in an amount of at least 99 and up to 100 weight % based on total dry layer weight.
10. The device of claim 1 wherein the amic acid or amic ester is one or more of compounds I-1 through I-50:
11. The device of claim 1 wherein the thin organic semiconductor film consists essentially of the arylene diimide compound.
12. The device of claim 1 wherein the thin organic semiconductor film consists of the arylene diimide compound.
13. The device of claim 1 wherein the thin organic semiconductor film is capable of exhibiting a field electron mobility greater than 0.001 cm 2 /V·sec.
14. The device of claim 1 that has an on/off ratio of a source/drain current of at least 10 4 .
15. The device of claim 1 wherein the gate electrode is adapted for controlling, by means of a voltage applied to the gate electrode, a current between the source and drain electrodes through the thin organic semiconductor film.
16. The device of claim 1 wherein the source, drain, and gate electrodes each independently comprise a material selected from doped silicon, metal, and a conducting polymer.
17. An electronic device selected from the group consisting of integrated circuits, active-matrix display, and solar cells comprising a multiplicity of the thin-film transistor devices of claim 1 .
18. The electronic device of claim 17 wherein the multiplicity of the thin-film transistor devices is disposed on a non-participating substrate that is optionally flexible.
19. The device of claim 1 that is disposed on a flexible removable polymeric support that is adhered to a rigid substrate.