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Field Effect Transistor

Field Effect Transistor

Field-effect transistors (FETs) are integral to electronic circuits and distinguished by their three-terminal setup: the gate, drain, and source. These transistors operate as unipolar devices, which utilize either electrons or holes as charge carriers, in contrast to bipolar transistors, which use both types of carriers. The primary function of the FET is to modulate the flow of these carriers from the source to the drain through a channel. The voltage difference between the gate and source...

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
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Semiconductors

Semiconductors

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Related Experiment Video

Updated: Feb 1, 2026

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors

Published on: November 7, 2016

Highly Oriented Liquid Crystal Semiconductor for Organic Field-Effect Transistors.

Moon Jong Han¹, Dayan Wei², Yun Ho Kim³

¹Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea.

ACS Central Science

|December 18, 2018

Summary

This summary is machine-generated.

Researchers developed new liquid crystal (LC) semiconductors based on benzothienobenzothiophene (BTBT). These materials enable precise measurement of electrical conductivity and carrier mobility in oriented structures.

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Last Updated: Feb 1, 2026

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors

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Area of Science:

Organic electronics
Materials science
Liquid crystals

Background:

Benzothienobenzothiophene (BTBT) derivatives are known organic semiconductors.
Achieving highly ordered structures is crucial for optimizing charge transport.
Existing liquid crystal (LC) semiconductors have limitations in processing and characterization.

Purpose of the Study:

To introduce nematic liquid crystal (LC) ordering into the BTBT family.
To create a new class of LC semiconducting materials.
To enable facile processing into highly oriented monodomains for improved characterization.

Main Methods:

Synthesis of a novel mesogenic compound incorporating BTBT.
Processing of the compound into highly oriented monodomains using anisotropic surfaces.
In situ monitoring of domain quality and orientation via LC birefringence textures.
Measurement of electrical conductivity on oriented domains.

Main Results:

Successful introduction of nematic LC ordering into BTBT.
Creation of a new class of LC semiconducting materials.
Demonstration of facile processing into highly oriented monodomains.
Precise determination of anisotropic carrier mobility.

Conclusions:

The new BTBT-based LC semiconductors offer facile processing and high orientation.
This advancement enables a new era of precision and reliability in measuring anisotropic carrier mobility.
The findings pave the way for advanced organic electronic devices.