Copper Indium Gallium Selenide (CuInGaSe2) Semiconductors

Topics Covered

Chemical Properties
Electrical Properties
Mechanical Properties
Safety Information


Copper indium gallide selenide is a I-III-VI semicondutor material composed of selenium, gallium, indium and copper. It is a tetrahedrally bonded semiconductor mostly found in chalcopyrite.

During heating, it transforms into zincblende, and its transition temperature decreases from 1045 to 805°C. It is mainly used in the manufacture of solar cells due to its high absorption coefficient and ability to strongly absorb sunlight.


Copper indium gallium selenide finds applications in the following:

  • Photovoltaic applications
  • Sun angle detectors in space applications
  • Unmanned aerial vehicles.

Chemical Properties

The chemical properties of copper indium gallium selenide are provided in the table below:

Chemical Properties
Chemical Formula CuInxGa(1-x)Se2
Molecular Weight 327.05
CAS No. 12018-95-0
Group Copper – 11
Indium – 13
Gallium – 13
Selenium - 16
Crystal Structure Tetragonal
Lattice Constant a = 0.56–0.58 nm
c = 1.10–1.15 nm

Electrical Properties

The electrical properties of copper indium gallium selenide are provided in the table below:

Electrical Properties
Band Gap 1 – 1.7 eV

Mechanical Properties

The mechanical properties of copper indium gallium selenide are provided in the tables below:

Mechanical Properties
Density ~5.7 g/cm3
Melting Point 990 - 1070°C

Safety Information

Safety Information
Risk Phrases R22 - Harmful if swallowed
R23 - Toxic by inhalation
R25 - Toxic if swallowed
R37 - Irritating to respiratory system
R43 - May cause sensitization by skin contact
R49 - May cause cancer by inhalation
R53 - May cause long-term adverse effects in the aquatic environment.
Safety Phrases S1 - Keep locked up
S2 - Keep out of the reach of children
S22 - Do not breathe dust
S36 - Wear suitable protective clothing
S37 - Wear suitable gloves
S53 - Avoid exposure – obtain special instructions before use
S61 - Avoid release to the environment.

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