Antimony triselenide
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| Template:Longitem | Template:Chembox Elements/molecular formula |
| Molar mass | Template:Chem molar mass |
| Appearance | black crystals |
| Density | 5.81 g/cm3, solid |
| Melting point | Template:Chembox CalcTemperatures |
| Template:Longitem | Orthorhombic, oP20, SpaceGroup = Pnma, No. 62 |
| Template:Longitem | antimony(III) oxide, antimony(III) sulfide, antimony(III) telluride |
| Template:Longitem | arsenic(III) selenide, bismuth(III) selenide |
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Antimony triselenide is the chemical compound with the formula Template:Chem2. The material exists as the sulfosalt mineral antimonselite (IMA symbol: Atm[2]), which crystallizes in an orthorhombic space group.[3] 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.[4] 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.[5] Its band gap is 1.18 eV at room temperature.[6]
The compound may be formed by the reaction of antimony with selenium and has a melting point of 885 K.[4]
Applications
Template:Chem2 is now being actively explored for application thin-film solar cells.[7] A record light-to-electricity conversion efficiency of 9.2% has been reported.[8]
References
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- ↑ a b Script error: No such module "citation/CS1".
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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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