Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

1.1K
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
1.1K
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

632
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
632
Semiconductors01:22

Semiconductors

1.6K
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...
1.6K
Types of Semiconductors01:20

Types of Semiconductors

1.5K
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...
1.5K
Bonding in Metals02:32

Bonding in Metals

52.6K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
52.6K
Metallic Solids02:37

Metallic Solids

20.9K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

An Oxygen-Defect-Induced Unsaturated Coordination Strategy Boosts High-Selective PET Upcycling via Suppressing Oxygen Evolution.

Angewandte Chemie (International ed. in English)·2026
Same author

Design of Skyrmion Bags with Tunable Topology in Symmetry-Broken 2D Lattices.

ACS nano·2026
Same author

Undergraduate nursing students' perceptions, needs, and expectations regarding large language model-based virtual patients: a qualitative study.

BMC nursing·2026
Same author

An Efficient Photocatalytic Process for Hydrogen Production and Acetic Acid Synthesis on FAPbBr<sub>3</sub> Perovskite.

Angewandte Chemie (International ed. in English)·2026
Same author

Mapping the landscape of AI-driven digital twins in medical diagnosis: A scoping review on core technologies, applications, and implementation barriers.

Artificial intelligence in medicine·2026
Same author

Giant thermal Hall effect in topological magnon insulator Cr<sub>3</sub>Se<sub>4</sub> monolayer.

Materials horizons·2026

Related Experiment Video

Updated: Feb 10, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

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

Published on: June 3, 2015

15.5K

Tl2S: a metal-shrouded two-dimensional semiconductor.

Shiying Shen1, Yan Liang, Yandong Ma

  • 1School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandanan Str. 27, 250100 Jinan, P. R. China. yandong.ma@sdu.edu.cn weiw@sdu.edu.cn daiy60@sdu.edu.cn.

Physical Chemistry Chemical Physics : PCCP
|May 22, 2018
PubMed
Summary
This summary is machine-generated.

Researchers discovered Tl2S, a stable, semiconducting 2D metal-shrouded crystal. This novel material shows promising electronic and photovoltaic properties for advanced device applications.

More Related Videos

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
11:14

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

Published on: May 28, 2016

14.4K
Planar and Three-Dimensional Printing of Conductive Inks
10:49

Planar and Three-Dimensional Printing of Conductive Inks

Published on: December 9, 2011

37.8K

Related Experiment Videos

Last Updated: Feb 10, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

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

Published on: June 3, 2015

15.5K
Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope
11:14

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

Published on: May 28, 2016

14.4K
Planar and Three-Dimensional Printing of Conductive Inks
10:49

Planar and Three-Dimensional Printing of Conductive Inks

Published on: December 9, 2011

37.8K

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Solid-State Chemistry

Background:

  • The family of metal-shrouded two-dimensional (2D) crystals is expanding, but most known materials are metallic.
  • There is a need for novel 2D materials with semiconducting properties for electronic and photovoltaic applications.

Purpose of the Study:

  • To identify and characterize new semiconducting 2D metal-shrouded crystals.
  • To investigate the electronic, photovoltaic, and structural properties of the Tl2S monolayer.
  • To explore potential applications in electronic and photovoltaic devices.

Main Methods:

  • First-principles calculations were employed to predict and analyze the properties of the Tl2S monolayer.
  • Stability was assessed through thermal and dynamic analyses.
  • Electronic band structure, light absorption, and spin-valley coupling were investigated.

Main Results:

  • A stable, semiconducting 2D metal-shrouded crystal, the Tl2S monolayer, was identified.
  • Tl2S monolayers exhibit tunable bandgaps (1.89-2.31 eV), strong light absorption, and efficient photo-electricity transduction.
  • The unique metal-shrouded structure facilitates excellent electrode contacts, and a large conduction band spin-valley coupling was observed.

Conclusions:

  • The Tl2S monolayer is a promising candidate for experimental exfoliation and device fabrication.
  • Its unique electronic and photovoltaic properties make it suitable for diverse applications in electronics and photovoltaics.
  • The observed spin-valley coupling opens avenues for spintronic applications.