Cadmium Phosphide (Cd3P2) Semiconductors

Topics Covered

Chemical Properties
Electrical Properties
Mechanical and Optical Properties
Safety Information


Cadmium is a soft, bluish white metal that occurs as minor component in most of the zinc ores. Cadmium phosphide is a binary compound of cadmium and phosphate, which readily reacts with nitric acid, oxidizing agents, acid fumes, acids, moisture, steam and water.


Cadmium phosphide finds applications in the following:

  • Pesticide
  • Laser diodes
  • High power, high frequency applications.

Chemical Properties

The chemical properties of cadmium phosphide are provided in the table below:

Chemical Properties
Chemical Formula Cd3P2
Molecular Weight 399.181
CAS No. 12014-28-7
Group Cadmium – 12
Phosphorus - 15
Crystal Structure Tetragonal

Electrical Properties

The electrical properties of cadmium phosphide are provided in the table below:

Electrical Properties
Electrical Resistivity 9–25 x 10-3 Ω cm
Intrinsic Carrier Concentration 2-5 × 1017 cm-3
Dielectric Constant 37
Band Gap 0.52 eV
Electron Mobility 1500 cm2/Vs

Mechanical and Optical Properties

The mechanical and optical properties of cadmium phosphide are provided in the tables below:

Mechanical Properties
Density 5.96 g/cm3
Melting Point 700°C
Optical Properties
Refractive Index 3.88

Safety Information

Safety Information
GHS Hazard Statements H314: Causes skin irritation
H318: Causes serious eye irritation
H370:Causes damage to organs.
Safety Precautions P210: Keep away from heat/sparks/open flames/hot surfaces – No smoking
P233: Keep container tightly closed
P261:Avoid breathing dust/fume/gas/mist/vapors/spray
P264: Wash hands thoroughly after handling
P280: Wear protective gloves/protective clothing/eye protection/face protection.


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