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Related Concept Videos

Biasing of P-N Junction01:16

Biasing of P-N Junction

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The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
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Modeling of Diode Reverse Characteristics01:14

Modeling of Diode Reverse Characteristics

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In electronic circuits, reverse-biased diode configurations are critical for regulating voltage levels. Zener diodes exploit the reverse breakdown phenomenon and exhibit a controlled breakdown at a specific Zener voltage (VZ). They are designed to maintain a constant voltage across their terminals and are commonly used for voltage regulation in circuits.
When a reverse voltage applied to a Zener diode exceeds its breakdown voltage, the diode enters the breakdown region. At this point, the...
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Modeling of Diode Forward Characteristics01:19

Modeling of Diode Forward Characteristics

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Understanding the behavior of diodes when forward-biased is a fundamental aspect of electronic circuit design and analysis. This analysis primarily utilizes two models: the exponential diode model and the constant-voltage-drop model. The exponential model comes into play when the source voltage exceeds 0.5 volts, pushing the diode current to rise exponentially above the saturation current. This relationship is graphically depicted in the current-voltage (I-V) curve, illustrating the diode's...
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P-N junction01:11

P-N junction

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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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Schottky Barrier Diode01:27

Schottky Barrier Diode

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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...
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Diode: Forward bias01:20

Diode: Forward bias

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In semiconductor devices, diodes play a crucial role in directing current flow, and its operation is primarily categorized into forward bias and reverse bias. A diode is said to be forward-biased when its p-type region is connected to the positive terminal of a battery and its n-type region is linked to the negative terminal. This configuration reduces the potential barrier within the diode, allowing current to flow easily from the p to the n-type region.
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Related Experiment Video

Updated: Jul 15, 2025

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
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Vertical Diamond p-n Junction Diode with Step Edge Termination Structure Designed by Simulation.

Guangshuo Cai1, Caoyuan Mu2, Jiaosheng Li1

  • 1School of Optoelectronic Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China.

Micromachines
|September 28, 2023
PubMed
Summary
This summary is machine-generated.

Diamond vertical p-n junction diodes with step edge termination were simulated. Combining junction termination extension significantly improved breakdown voltage and device performance by optimizing electric field distribution.

Keywords:
diamondjunction terminal extensionp-n junction diodesimulation

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Area of Science:

  • Materials Science
  • Semiconductor Physics
  • Device Engineering

Background:

  • Vertical p-n junction diodes are crucial semiconductor devices.
  • Edge termination is essential for high-voltage performance in diodes.
  • Diamond offers superior material properties for power electronics.

Purpose of the Study:

  • To investigate diamond-based vertical p-n junction diodes with step edge termination.
  • To enhance the breakdown voltage and overall performance of these diodes.
  • To analyze the impact of junction termination extension on electric field distribution.

Main Methods:

  • Utilized Silvaco TCAD (Version 5.0.10.R) for device simulation.
  • Investigated diodes with conventional, step edge, and combined junction termination extension.
  • Optimized structural parameters of the junction termination extension.

Main Results:

  • Step edge termination suppressed electric field crowding but had minimal impact on forward characteristics.
  • Simple step edge termination resulted in lower breakdown voltage than ideal parallel-plane structures.
  • Combined junction termination extension with step edge termination achieved overlapping depletion regions, uniform electric field, and enhanced breakdown voltage.

Conclusions:

  • Step edge termination is effective in managing electric field crowding in diamond diodes.
  • Combining junction termination extension with step edge termination is a viable strategy to significantly boost breakdown voltage.
  • Optimized diamond vertical p-n junction diodes with advanced termination structures show promise for high-performance applications.