Antimony triselenide
Antimony triselenide is the chemical compound with the formula Template:Chem2. The material exists as the sulfosalt mineral antimonselite (IMA symbol: Atm[1]), which crystallizes in an orthorhombic space group.[2] In this compound, antimony has a formal oxidation state +3 and selenium −2. The bonding in this compound has covalent character as evidenced by the black color and semiconducting properties of this and related materials.[3] The low-frequency dielectric constant (ε0) has been measured to be 133 along the c axis of the crystal at room temperature, which is unusually large.[4] Its band gap is 1.18 eV at room temperature.[5]
The compound may be formed by the reaction of antimony with selenium and has a melting point of 885 K.[3]
Applications
Template:Chem2 is now being actively explored for application thin-film solar cells.[6] A record light-to-electricity conversion efficiency of 9.2% has been reported.[7]
References
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- ↑ Jambor, J. L.; Grew, E. S."New Mineral Names" American Mineralogist, Volume 79, pages 387-391, 1994.
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