Cerium Sulfide (CeS) is a rare earth sulfide compound with the chemical formula CeS and CAS number 12014-82-3. It is a black solid powder with a cubic crystal structure.

Applications

1. Optics: Cerium sulfide is used as a pigment in various optical devices, such as laser diodes, optical filters, and x-ray scintillators.

2. Ceramics: Cerium sulfide is used as a dopant in ceramic materials to improve their electrical and mechanical properties.

3. Catalysts: Cerium sulfide nanoparticles can act as a catalyst for various chemical reactions, including the hydrogenation of carbon dioxide and the decomposition of water.

4. Lubricants: Cerium sulfide can be used as a solid lubricant due to its low friction coefficient and high thermal stability.

5. Solar cells: Cerium sulfide nanoparticles can be used as a sensitizer in dye-sensitized solar cells to improve their efficiency.

6. Thermoelectric materials: Cerium sulfide is used as a thermoelectric material due to its high Seebeck coefficient and low thermal conductivity.

Physical Properties