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Semiconductors

Semiconductors

There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...

Types of Semiconductors

Types of Semiconductors

Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...

MOS Capacitor

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...

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Related Experiment Video

Updated: Dec 25, 2025

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

Semiconductor Quantum Dots for Memories and Neuromorphic Computing Systems.

Ziyu Lv¹, Yan Wang¹, Jingrui Chen²

¹Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, P. R. China.

Chemical Reviews

|March 24, 2020

Summary

This summary is machine-generated.

Semiconductor quantum dots (QDs) offer advanced nonvolatile memories and neuromorphic computing. These materials provide excellent electronic/optical properties for low-cost, high-performance electronics in the post-silicon era.

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Area of Science:

Materials Science
Nanotechnology
Computer Engineering

Background:

Growing demand for data storage and processing necessitates novel high-performance hardware.
Semiconductor quantum dots (QDs) exhibit desirable electronic/optical properties and stability for advanced applications.
QDs enable low-cost, large-area, and solution-based manufacturing of electronic devices.

Purpose of the Study:

To explore the development of nonvolatile memories and neuromorphic computing systems utilizing QD thin-film solids.
To highlight recent advances in QD technology for future electronic devices.
To discuss the potential of QDs in both conventional and emerging memory technologies.

Main Methods:

Review of recent advances in quantum dot (QD) materials and their electrical/optical properties.
Analysis of QD thin-film solids for nonvolatile memory applications (flash memories, memristors).
Examination of QD-based neuromorphic devices, including artificial synapses and sensory platforms.

Main Results:

QDs possess unique electrical and optical features suitable for advanced memory and neuromorphic applications.
QD thin-film solids demonstrate promise for optimized memory techniques and novel neuromorphic devices.
Recent studies show progress in QD-based artificial synapses and light-sensory synaptic platforms.

Conclusions:

Quantum dots are a promising material for next-generation nonvolatile memories and neuromorphic computing.
Further research and development are needed to overcome challenges for commercial translation of QD-based electronics.
QDs represent a key technology for the future post-silicon era of computing.