Sapphire Wafers for Bragg Reflections in XRD
What Substrates are Used to Fabricate Diodes?
Diodes can be fabricated using a variety of substrates and materials, depending on the type of diode, its intended application, and the required electrical, optical, or thermal properties. Here’s a categorized list of materials commonly used:
1. Silicon-Based Diodes
- Silicon (Si) – The most common material for general-purpose diodes (e.g., rectifiers, Zener diodes, Schottky diodes).
- Silicon-on-Insulator (SOI) – Used for high-speed and low-power diodes, particularly in CMOS circuits.
2. Compound Semiconductor-Based Diodes
- Gallium Arsenide (GaAs) – High-speed and RF applications (e.g., Gunn diodes, IMPATT diodes, LEDs, laser diodes).
- Gallium Nitride (GaN) – High-power, high-frequency applications (e.g., Schottky diodes, UV LEDs).
- Indium Phosphide (InP) – Used for high-frequency and optoelectronic applications (e.g., photodiodes, laser diodes).
- Silicon Carbide (SiC) – High-power and high-temperature diodes (e.g., Schottky diodes for power electronics).
3. Organic and Specialty Materials
- Organic Semiconductors – Used for organic light-emitting diodes (OLEDs) and flexible diodes.
- Graphene and Carbon Nanotubes (CNTs) – Emerging materials for ultrafast and nanoscale diodes.
- Perovskites – Used in high-efficiency photodetectors and solar cells.
4. Exotic and Research-Based Materials
- Diamond (CVD Diamond Substrates) – Used for high-power and high-temperature diode applications.
- 2D Materials (e.g., MoS₂, WS₂, WSe₂) – Used in next-generation ultrathin diodes for nanoelectronics.
The choice of substrate depends on bandgap, thermal conductivity, carrier mobility, and device operating conditions. Let me know if you need recommendations for a specific diode type!