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Related Concept Videos

Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

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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...
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Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

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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...
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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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Developing High Performance GaP/Si Heterojunction Solar Cells
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Atom-to-Device Simulation of MoO3/Si Heterojunction Solar Cell.

Jasurbek Gulomov1, Oussama Accouche2, Zaher Al Barakeh2

  • 1Renewable Energy Sources Laboratory, Andijan State University, Andijan 170100, Uzbekistan.

Nanomaterials (Basel, Switzerland)
|December 11, 2022
PubMed
Summary
This summary is machine-generated.

Molybdenum trioxide (MoO3) exhibits indirect semiconductor properties, making it suitable for solar cell applications. This study demonstrates MoO3/Si heterojunction solar cells achieve 8.8% efficiency, outperforming silicon homojunction cells.

Keywords:
DFTMoO3TCADheterojunctionsimulation

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Semiconductor Physics

Background:

  • Metal oxides are crucial in optoelectronics due to their transparency and conductivity.
  • Molybdenum trioxide (MoO3) is a metal oxide with potential applications in electronic devices.

Purpose of the Study:

  • To determine and assess the physical, optical, and electronic properties of MoO3.
  • To evaluate the performance of MoO3/Si heterojunction solar cells.

Main Methods:

  • Density Functional Theory (DFT) calculations using PBE and HSE06 functionals.
  • Optical and electronic parameter simulations.
  • Sentaurus TCAD for photoelectric parameter calculation of MoO3/Si heterojunction solar cells.

Main Results:

  • MoO3 exhibits indirect semiconductor properties with band gaps of 2.12 eV (PBE) and 3.027 eV (HSE06).
  • Calculated electron and hole mobilities suggest suitability for optoelectronic applications.
  • MoO3/Si heterojunction solar cells achieved 8.8% efficiency, surpassing silicon homojunction cells by 1.24%.

Conclusions:

  • MoO3 possesses properties suitable for anti-reflection layers and emitter layers in solar cells.
  • The MoO3/Si heterojunction demonstrates enhanced efficiency compared to traditional silicon solar cells.
  • Optimizing MoO3 layer thickness is critical for maximizing short-circuit current in MoO3/Si solar cells.