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Related Concept Videos

Field Effect Transistor01:29

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...
P-N junction01:11

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...

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Related Experiment Video

Updated: Jun 23, 2026

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
08:43

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

Published on: November 7, 2016

Organic field effect transistor using pentacene single crystals grown by a liquid-phase crystallization process.

Yasuo Kimura1, Michio Niwano, Naohiko Ikuma

  • 1Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan. ykimura@riec.tohoku.ac.jp

Langmuir : the ACS Journal of Surfaces and Colloids
|April 29, 2009
PubMed
Summary

Solution crystallization yields high-quality pentacene single crystals for organic field-effect transistors (OFETs). This method offers a promising chemical route for fabricating high-performance OFET devices.

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Solid-State Physics

Background:

  • Pentacene is a key organic semiconductor for high-performance electronic devices.
  • Previous methods for growing pentacene single crystals, such as physical vapor deposition, have limitations.
  • Solution-based crystallization offers a potentially scalable and cost-effective alternative.

Purpose of the Study:

  • To develop a solution-based crystallization method for growing high-quality pentacene single crystals.
  • To fabricate and characterize organic field-effect transistors (OFETs) using these crystals.
  • To compare the performance of solution-grown pentacene OFETs with those grown by physical vapor deposition.

Main Methods:

  • Growing pentacene single crystals from a trichlorobenzene solution.
  • Fabricating organic field-effect transistors (OFETs) using the synthesized pentacene crystals.
  • Characterizing the electrical properties of the fabricated OFETs, focusing on field-effect mobility.

Main Results:

  • Nearly perfect pentacene single crystals with wide terraces (micrometers in width) were successfully grown via solution crystallization.
  • Fabricated OFETs exhibited field-effect mobility in the range of 0.4-0.6 cm²/V·s.
  • The performance is comparable to OFETs made from pentacene single crystals grown by physical vapor-phase methods.

Conclusions:

  • Solution crystallization is a viable and promising chemical method for producing high-quality pentacene single crystals.
  • This approach facilitates efficient device processing for high-performance organic field-effect transistors.
  • The study highlights the potential of solution-based techniques in advancing organic semiconductor device fabrication.