How does an organic field effect transistor work?

Field-effect transistors usually operate as a capacitor. They are composed of two plates. One plate works as a conducting channel between two ohmic contacts, which are called the source and the drain contacts. The other plate works to control the charge induced into the channel, and it is called the gate.

What is channel in field effect transistor?

The FET controls the flow of electrons (or electron holes) from the source to drain by affecting the size and shape of a “conductive channel” created and influenced by voltage (or lack of voltage) applied across the gate and source terminals.

What makes organic molecules work as semiconductors?

Organic semiconductors are solids whose building blocks are pi-bonded molecules or polymers made up by carbon and hydrogen atoms and – at times – heteroatoms such as nitrogen, sulfur and oxygen. They exist in form of molecular crystals or amorphous thin films.

What are the different configurations of an organic field effect transistor?

Various configurations of organic field effect transistors. (A) Bottom gate Top contact, (B) Bottom gate Bottom contact, (C) Top gate Bottom contact, (D) Top gate Top contact. The field effect mobility of the active layer can be extracted from the drain current at the linear or saturated operation regimes (Fig. 24.15).

How do thin-film transistors work?

A thin-film transistor (TFT) is a type of field-effect transistor that is usually used in a liquid crystal display (LCD). This type of display features a TFT for each individual pixel. These TFTs act as individual switches that allow the pixels to change state rapidly, making them turn on and off much more quickly.

What is organic thin-film?

Organic thin-film transistor (OTFT) technology involves the use of organic semiconducting compounds in electronic components, notably computer displays. Such displays are bright, the colors are vivid, they provide fast response times, and they are easy to read in most ambient lighting environments.

What are the types of field effect transistor how a field effect transistor does is being test?

The Field Effect Transistor, FET, is a three terminal active device that uses an electric field to control the current flow and it has a high input impedance which is useful in many circuits. The field effect transistor, FET is a key electronic component using within many areas of the electronics industry.

What is a field effect transistor used for?

The FET(Field Effect Transistor) is a three-terminal electronic device used to control the flow of current by the voltage applied to its gate terminal. The three terminals in this device are named drain, source, and gate. Source: It is a terminal through which charge carriers enter the channel.

What is organic and inorganic semiconductor?

Organic semiconductors are made from carbon based materials, whereas inorganic semiconductors are made of noncarbon based materials such as silicon.

Why organic materials are preferred in electronic devices?

One of the promised benefits of organic electronics is their potential low cost compared to traditional electronics. Attractive properties of polymeric conductors include their electrical conductivity (which can be varied by the concentrations of dopants) and comparatively high mechanical flexibility.

What is transistor on off ratio?

On-off ratio is the ratio of the on-state and off-state current without any applied gate voltage (Vg). A high on-off ratio means a low leakage current i.e. an improved device performance. With reduced dimensionality, FETs (typically, MOSFETs) starts to show higher I_off due to short channel effect.

What is organic thin film?

What is an organic field-effect transistor?

An organic field-effect transistor ( OFET) is a field-effect transistor using an organic semiconductor in its channel. OFETs can be prepared either by vacuum evaporation of small molecules, by solution-casting of polymers or small molecules, or by mechanical transfer of a peeled single-crystalline organic layer onto a substrate.

What is the channel length of a field effect transistor?

A field-effect transistor (organic or inorganic) consists of a thin semiconducting layer, source and drain electrodes, a gate electrode, and an insulating gate dielectric. The distance between source and drain electrodes is called channel length L. The width of source and drain electrodes is called channel width W.

What is the thickness of an organic CMOS logic circuit?

Organic CMOS logic circuit. Total thickness is less than 3 μm. Scale bar: 25 mm An organic field-effect transistor ( OFET) is a field-effect transistor using an organic semiconductor in its channel.

What is the source and drain electrode of a semiconductor device?

Here the source and drain electrodes are directly deposited onto the conducting channel (a thin layer of semiconductor) then a thin film of insulator is deposited between the semiconductor and the metal gate contact. This structure suggests that there is no depletion region to separate the device from the substrate.