Properties of insulated gate field-effect transistors with a polyaniline gate electrode
| Autor: | D. Chinn, Jiří Janata, M. Liess, Danuta Petelenz |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Materials science
business.industry Gate dielectric Transistor Metals and Alloys Field effect Drain-induced barrier lowering Surfaces and Interfaces Surfaces Coatings and Films Electronic Optical and Magnetic Materials Threshold voltage law.invention chemistry.chemical_compound chemistry law Gate oxide Polyaniline Materials Chemistry Optoelectronics Field-effect transistor business |
| Zdroj: | Thin Solid Films. 286:252-255 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/s0040-6090(95)08233-6 |
| Popis: | On a p-type silicon wafer with n+ source and drain contacts, covered by a SiO2Si3N4 dielectric insulating layer, field-effect transistors were made by spin coating with a polyaniline gate electrode layer. For comparison conventional IGFETs were also made on the same chip. Preparation and characterization of devices that change their threshold voltage due to modulation of work function of the gate electrode are described. Such devices can in principle be used for gas sensing. The steady-state and transient behavior of the devices was investigated: the work function of polyaniline has been determined by comparing the metal-oxide-semiconductor field-effect transistor threshold voltage to the polyaniline gate field effect transistor (PANi-FET) threshold voltage. The response of the PANi-FETs to a step function potential input has been determined. The device behavior was modeled with a simulation in which the gate and pre-gate area are represented by a distributed resistance-capacitance network, under the assumption that the resistivity of the polyaniline film and its contact resistance to platinum is not frequency dependent. The behavior is well described by the model. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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