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Related Concept Videos

Diode: Forward bias01:20

Diode: Forward bias

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.
The behavior of a diode in forward bias...
Semiconductors01:22

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...
Modeling of Diode Forward Characteristics01:19

Modeling of Diode Forward Characteristics

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...
Diode: Reverse bias01:14

Diode: Reverse bias

A diode is reverse-biased when the positive terminal of an external voltage source is connected to the n-type material and the negative terminal to the p-type material. This configuration opposes the natural direction of current flow through the diode, effectively increasing the width of the depletion region and the barrier potential. The reverse bias condition produces a minimal leakage current, primarily due to minority charge carriers. This leakage becomes significant when the reverse...
Small-signal Diode Model01:18

Small-signal Diode Model

In analyzing the behavior of diodes in circuits, the relationship between the current through a diode and the voltage across it is of particular interest, especially when considering the effect of a direct current (DC) bias voltage. When applied, this DC bias influences the diode's operating point, known as the Q point, around which the current-voltage (I-V) characteristic of the diode exhibits exponential behavior. Introducing a small, time-varying signal on top of this bias aids in examining...
Biasing of P-N Junction01:16

Biasing of P-N Junction

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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Note: ε(T) dependence behavior in GaP diodes at high temperatures.

V A Krasnov1, S V Shutov, S Yu Yerochin

  • 1V. Lashkaryov Institute of Semiconductor Physics, NAS Ukraine, 76∕78 Zavodskaya St., 73008 Kherson, Ukraine.

The Review of Scientific Instruments
|July 5, 2012
PubMed
Summary

Researchers studied the static dielectric constant (ε) in Gallium Phosphide (GaP) diodes across a wide temperature range. Findings reveal a temperature-dependent ε(T) function, useful for high-temperature electronics and thermometry applications.

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Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Published on: July 17, 2020

Area of Science:

  • Solid State Physics
  • Materials Science
  • Semiconductor Physics

Background:

  • Understanding the dielectric properties of semiconductor materials is crucial for electronic device performance.
  • Gallium Phosphide (GaP) is a wide bandgap semiconductor with potential applications in high-temperature environments.
  • The temperature dependence of dielectric constants can significantly impact device characteristics.

Purpose of the Study:

  • To investigate the temperature behavior of the static dielectric constant (ε) in the base region of Gallium Phosphide (GaP) diodes.
  • To determine the ε(T) function and analyze its characteristics within the 300-575 K temperature range.
  • To provide data valuable for the development of high-temperature electronics and thermometry.

Main Methods:

  • Capacity-voltage (C-V) characteristics of GaP diodes were measured.
  • The static dielectric constant (ε) was extracted from the C-V data.
  • The temperature dependence of ε, denoted as ε(T), was analyzed in the range of 300-575 K.

Main Results:

  • The static dielectric constant (ε) of GaP diodes exhibits a monotonic temperature dependence.
  • A maximum in the ε(T) function was observed in the high-temperature region.
  • The observed temperature behavior is attributed to a mixed electron-ion polarization mechanism characteristic of wide bandgap III-V semiconductors.

Conclusions:

  • The temperature dependence of the static dielectric constant in GaP diodes has been successfully characterized.
  • The findings provide essential data for designing and optimizing GaP-based devices for high-temperature operation.
  • The results are beneficial for the advancement of high-temperature electronics and precision thermometry using semiconductor materials.