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- Semiconductor Devices Tutorial
- Semiconductor Devices - Home
- Introduction
- Atomic Combinations
- Conduction in Solid Materials
- Conductivity & Mobility
- Types of Semiconductor
- Doping in Semiconductors
- Junction Diodes
- Depletion Zone
- Barrier Potential
- Junction Biasing
- Leakage Current
- Diode Characteristics
- Light Emitting Diode
- Zener Diode
- Photo Diode
- Photovoltaic Cells
- Varactor Diode
- Bipolar Transistors
- Construction of a Transistor
- Transistor Biasing
- Configuration of Transistors
- Field Effect Transistors
- JFET Biasing
- Semiconductor Devices - MOSFET
- Operational Amplifiers
- Practical Op-Amps
- Semiconductor Devices - Integrator
- Differentiator
- Oscillators
- Feedback & Compensation
- Semiconductor Devices Resources
- Quick Guide
- Semiconductor Devices - Resources
- Semiconductor Devices - Discussion
Semiconductor Devices - Depletion Zone
Initially, when a junction diode is formed, there is a unique interaction between current carriers. In N type material, the electrons move readily across the junction to fill holes in the P material. This act is commonly called diffusion. Diffusion is the result of high accumulation of carriers in one material and a lower gathering in the other.
Generally, the current carriers which are near to the junction only takes part in the process of diffusion. Electrons departing the N material cause positive ions to be generated in their place. While entering the P material to fill holes, negative ions are created by these electrons. As a result, each side of the junction contains a large number of positive and negative ions.
![Depletion Region](/semiconductor_devices/images/depletion_region.jpg)
The area where these holes and electrons become depleted is generally known by the term depletion region. It is an area where there is lack of majority current carriers. Normally, a depletion region is developed when P-N junction is formed. The following figure shows the depletion region of a junction diode.
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