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Related Concept Videos

Schottky Barrier Diode01:27

Schottky Barrier Diode

Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
Interfacial Electrochemical Methods: Overview01:06

Interfacial Electrochemical Methods: Overview

Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current passing...
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

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 semiconductor's...
Imperfections in Crystal Structure: Stoichiometric Point Defects01:26

Imperfections in Crystal Structure: Stoichiometric Point Defects

Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

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...
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: Jul 16, 2026

Fabrication of Schottky Diodes on Zn-polar BeMgZnO/ZnO Heterostructure Grown by Plasma-assisted Molecular Beam Epitaxy
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Fabrication of Schottky Diodes on Zn-polar BeMgZnO/ZnO Heterostructure Grown by Plasma-assisted Molecular Beam Epitaxy

Published on: October 23, 2018

Interfacial Schottky junction induced enhanced piezocatalytic activity.

Akshay Gaur1, Addisalem Abebe2, Chirag Porwal1

  • 1School of Mechanical and Materials Engineering, Indian Institute of Technology Mandi, Mandi, 175005, India.

Scientific Reports
|July 14, 2026
PubMed
Summary

Researchers enhanced piezocatalytic activity for pollutant removal by creating Schottky junctions with gold (Au) and silver (Ag) on barium titanate (BaTiO₃) ceramic. This metal-semiconductor interface boosts catalyst performance for degrading methylene blue dye.

Keywords:
Au/Ag layerBaTiO3 (BT)PiezocatalysisSchottky junction

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Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics
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Fabrication of Schottky Diodes on Zn-polar BeMgZnO/ZnO Heterostructure Grown by Plasma-assisted Molecular Beam Epitaxy
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Published on: August 5, 2020

Area of Science:

  • Materials Science
  • Environmental Chemistry
  • Catalysis

Background:

  • Schottky junctions formed by metal deposition on semiconductors can induce polarization.
  • This phenomenon offers a pathway to enhance piezocatalytic activity for environmental remediation.
  • Barium titanate (BaTiO₃) is a semiconductor with potential piezocatalytic properties.

Purpose of the Study:

  • To investigate the effect of metal deposition (Au, Ag) on the piezocatalytic activity of BaTiO₃.
  • To enhance the degradation of methylene blue (MB) using modified BaTiO₃ catalysts.
  • To demonstrate a strategy for improving catalyst performance through interfacial polarization.

Main Methods:

  • Fabrication of BaTiO₃ (BT), Ag-BT, and Au-BT ceramic catalysts.
  • Evaluation of piezocatalytic activity under mechanical vibrations.
  • Measurement of methylene blue (MB) dye degradation efficiency over time.

Main Results:

  • Au-BT exhibited the highest MB degradation (89%), followed by Ag-BT (75%) and BT (47%) within 3 hours.
  • Au-BT and Ag-BT showed approximately 1.9- and 1.6-fold improvements in degradation compared to plain BT.
  • Enhanced piezocatalytic activity is linked to increased built-in polarization at the metal-semiconductor interface.

Conclusions:

  • Metal deposition on BaTiO₃ effectively enhances its piezocatalytic activity for pollutant degradation.
  • The strategy of interfacial polarization via Schottky junction formation is a viable method for catalyst improvement.
  • This approach offers a non-chemical alternative for boosting catalyst performance in environmental applications.