Doped Semiconductors | N-Type, P-Type & Heavily Doped Silicon

Heavily Doped Semiconductor Substrates

UniversityWafer supplies heavily doped semiconductor wafers for electronics, MEMS, photonics, integrated circuits, sensors, and advanced research. Available materials include heavily doped silicon, silicon-on-insulator (SOI), and compound semiconductor substrates with custom resistivity, carrier concentration, crystal orientation, oxide layers, and polish options.

A PhD candidate requested the following quote:

Need an epitaxial insulating crystal on a heavily doped semiconductor (preferably silicon). GaN on silicon could work, but more cost-effective alternatives are desired.

Reference #99738 for specifications and pricing.

Get Your Doped Semiconductor Quote FAST! Or, Buy Online and Start Researching Today!

Degenerately Doped Semiconductor Wafers

Degenerately doped semiconductors contain extremely high concentrations of dopants, causing the material to behave more like a metal than a conventional semiconductor. These low-resistivity substrates are widely used for ohmic contacts, conductive backplanes, transistor fabrication, MEMS, and advanced semiconductor device research.

An electrical engineering student requested the following:

Can you please provide a quotation for a degenerately doped n++ silicon substrate with 300 nm of thermally grown SiO₂? The material should have a much higher doping concentration than standard n-type silicon.

UniversityWafer Response:

A degenerately doped semiconductor typically has a resistivity below 0.020 Ω·cm, allowing it to exhibit electrical properties similar to a metal.

P-type silicon wafers are commonly doped with boron.
N-type silicon wafers are typically doped with antimony (0.01–0.02 Ω·cm) or arsenic (0.001–0.005 Ω·cm).
Degenerately doped phosphorus silicon wafers are much less common due to manufacturing limitations.

Reference #221401 for specifications and pricing.

Custom Doped Semiconductor Solutions

UniversityWafer provides custom n-type, p-type, heavily doped, and degenerately doped semiconductor wafers with specified resistivity, carrier concentration, oxide thickness, crystal orientation, diameter, thickness, and surface finish to meet the requirements of university research laboratories, government facilities, and commercial semiconductor manufacturers.

Doped Semiconductor Carrier Concentration

UniversityWafer supplies doped semiconductor substrates with controlled electrical properties for research, device fabrication, testing, and production. Researchers often request materials with known or measured carrier concentration, resistivity, dopant type, orientation, and thickness.

Researcher Request: “I am looking to buy a piece of doped semiconductor material with the measured numerical carrier concentration provided. It does not matter what semiconductor material it is.”

Reference #105780 for specs and pricing.

What Are Doped Semiconductors?

Doped semiconductors are semiconductor materials whose electrical properties are intentionally changed by adding controlled amounts of impurities called dopants. Doping allows engineers and researchers to control conductivity, resistivity, carrier concentration, and whether the material behaves as an n-type semiconductor or p-type semiconductor.

N-Type Semiconductor Wafers

N-type semiconductors contain extra electrons as the majority charge carriers. In silicon wafers, common n-type dopants include phosphorus, arsenic, and antimony.

Dopants: Phosphorus, arsenic, antimony
Majority carriers: Electrons
Typical materials: N-type silicon wafers
Common uses: Transistors, diodes, sensors, MEMS, CMOS, and semiconductor device research

P-Type Semiconductor Wafers

P-type semiconductors contain holes as the majority charge carriers. In silicon wafers, boron is the most common p-type dopant.

Dopants: Boron, gallium, aluminum
Majority carriers: Holes
Typical materials: P-type silicon wafers
Common uses: P-N junctions, solar cells, IC fabrication, MEMS, and microelectronics

Why Semiconductor Doping Matters

Pure silicon has limited conductivity. By adding dopants, semiconductor wafers can be engineered for specific electronic behavior. This makes doped silicon and other doped semiconductor materials essential for modern electronics.

P-N junctions and diodes
MOSFET, BJT, CMOS, and transistor fabrication
Solar cells and photovoltaic devices
Integrated circuits and microelectronics
MEMS devices and sensors

Typical Dopant Concentration Ranges

Dopant concentration affects resistivity, carrier concentration, and device performance. Researchers may request lightly doped, moderately doped, heavily doped, or degenerately doped semiconductor substrates depending on the application.

Lightly doped: 10¹³ - 10¹⁶ atoms/cm³ for sensors, intrinsic device research, and optical applications.
Moderately doped: 10¹⁶ - 10¹⁸ atoms/cm³ for standard transistor and integrated circuit fabrication.
Heavily doped: >10¹⁸ atoms/cm³ for contact layers, conductive substrates, and highly conductive device regions.
Degenerately doped: very low-resistivity material that can behave more like a metal than a conventional semiconductor.

Applications of Doped Semiconductor Substrates

Doped semiconductor wafers are used across electronics, photonics, energy, and sensor research because their electrical properties can be tailored to the needs of the device.

Electronic components including transistors, diodes, and integrated circuits
Photovoltaic solar cells
Temperature, pressure, chemical, and radiation sensors
MEMS and microelectromechanical systems
Ohmic contacts and conductive backside layers
Research involving carrier concentration, resistivity, Hall effect, and sheet resistance measurements

Request Doped Semiconductor Pricing

To receive a quote, provide the semiconductor material, dopant type, conductivity type, resistivity, carrier concentration, diameter, thickness, orientation, polish, oxide requirement, and quantity. UniversityWafer can help source doped silicon and other semiconductor substrates for research and production.

What are Doped Semiconductors?