Aug 15 2013
Cadmium zinc telluride is an alloy of zinc telluride and cadmium telluride. It has a high electro-optic coefficient and transparency in the mid-infrared region. It is a direct bandgap semiconductor used in a number of applications. It posseses lowest thermal conductivity among all semiconductors, which make it difficult to obtain planar solid-liquid interface required for single crystal growth.
Applications
Cadmium zinc telluride finds applications in the following:
- Radiation detectors
- Photorefractive gratings
- Electro-optic modulators
- Infrared lasers
- Solar cells
- Terahertz generation and detection.
Chemical Properties
The chemical properties of cadmium zinc telluride are provided in the table below:
| Chemical Properties |
| Chemical Formula |
CdZnTe |
| Molecular Weight |
235.31 |
| CAS No. |
303114-50-3 |
| Group |
Cadmium – 12
Zinc – 12
Tellurium – 16 |
Electrical Properties
The electrical properties of cadmium zinc telluride are provided in the table below:
| Electrical Properties |
| Band Gap |
14.4 to 2.2 eV |
| Specific Resistivity |
>1x102 Ω cm-1 |
Mechanical and Optical Properties
The mechanical and optical properties of cadmium zinc telluride are provided in the tables below:
| Mechanical Properties |
| Melting Point |
1100-1150°C |
| Optical Properties |
| Refractive Index |
3.09 |
| Chromatic Dispersion |
-2.266 µm-1 |
| Extinction Coefficient |
7.360 e-2 |
Safety Information
| Safety Information |
| GHS Hazard Statements |
H332 - Harmful if inhaled
H334 - May cause allergy or asthma symptoms or breathing difficulties if inhaled
H335 - May cause respiratory irritation
H372 - Causes damage to organs through prolonged or repeated exposure. |
| Safety Precautions |
P233 - Keep container tightly closed
P264 - Wash hands thoroughly after handling
P280 - Wear protective gloves/protective clothing/eye protection/face protection
P341 - If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing. |