Related Experiment Video
Updated: May 21, 2026
12:32
The Effect of Anodization Parameters on the Aluminum Oxide Dielectric Layer of Thin-Film Transistors
Published on: May 24, 2020
GaS and GaSe ultrathin layer transistors
Dattatray J Late1, Bin Liu, Jiajun Luo
1Department of Materials Science and Engineering, International Institute of Nanotechnology, Northwestern University, Evanston, IL 60208, USA.
Advanced Materials (Deerfield Beach, Fla.)
|June 9, 2012
Summary
Researchers report on field-effect transistors made from 2D ultrathin layers of Gallium Sulfide (GaS) and Gallium Selenide (GaSe). These transistors exhibit both n-type and p-type behavior at room temperature.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Two-dimensional (2D) materials offer unique electronic properties.
- Gallium Sulfide (GaS) and Gallium Selenide (GaSe) are layered semiconductor materials with potential for electronic applications.
Purpose of the Study:
- To investigate the field-effect transistor (FET) characteristics of 2D ultrathin layers of GaS and GaSe.
- To evaluate their performance at room temperature for potential electronic device applications.
Main Methods:
- Micromechanical cleavage technique was used to prepare ultrathin layers of GaS and GaSe from bulk crystals.
- Fabrication and characterization of bottom-gate field-effect transistors using these 2D layers.
Main Results:
- Demonstrated typical n-type and p-type conductance transistor operation for both GaS and GaSe FETs.
- Achieved good ON/OFF ratios and measurable electron differential mobility in the fabricated transistors.
Conclusions:
- Ultrathin 2D layers of GaS and GaSe are suitable for room-temperature transistor applications.
- These materials exhibit ambipolar behavior and promising electronic characteristics for future devices.
Related Concept Videos
01:29Field 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...
01:17Characteristics of MOSFET
Metal-oxide-semiconductor field-effect Transistors, or MOSFETs, play a critical role in electronic circuits. They are primarily utilized for amplifying and switching signals.
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable quicker...
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable quicker...
01:22Bipolar Junction Transistor
Bipolar Junction Transistors (BJTs) are essential elements in electronic circuits, playing a crucial role in the functionality of amplifiers, memories, and microprocessors. These transistors can be designed as NPN or PNP based on their doping patterns. They consist of three layers: the emitter, base, and collector. The configuration of these layers and their respective doping levels—with N-type or P-type impurities—define the transistor's type and its operational characteristics.
The structure...
The structure...
01:16MOSFET
The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...
In an n-MOSFET, the structure includes n-type source and drain...
01:22MOSFET: Enhancement Mode
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...
01:23The Joule and Joule–Thomson Experiments
Consider an adiabatic system composed of two chambers, A and B, designed such that no heat flows into or out of the system. Initially, chamber A is filled with a gas at a fixed temperature T1, pressure p1, and volume V1, while chamber B is evacuated. The gas is then gradually forced through a rigid, porous barrier to chamber B, ultimately reaching temperature T2, pressure p2, and volume V2. A piston on the right side maintains a constant pressure (p2), which is lower than p1. The significant...