Bismuth selenide
| Names | |
|---|---|
| IUPAC name
selenoxobismuth, selanylidenebismuth [1]
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| Identifiers | |
3D model (JSmol)
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| ECHA InfoCard | 100.031.901 |
PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| Bi2Se3 | |
| Molar mass | 654.8 g/mol [2] |
| Appearance | Dull grey [3] |
| Density | 6.82 g/cm^3[2] |
| Melting point | 710 °C (1,310 °F; 983 K)[2] |
| insoluble | |
| Solubility | insoluble in organic solvents soluble in strong acids [2] |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards
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Toxic [3] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Bismuth selenide (Bi2Se3) is a gray powder that is a compound of bismuth and selenium also known as bismuth(III) selenide. It is a semiconductor and a thermoelectric material.[4] While perfect stoichiometric bismuth selenide should be a semiconductor (with a gap of 0.3 eV) naturally occurring selenium vacancies act as electron donors and it often acts as a semimetal.[5] Topologically protected surface states have been observed in Bismuth selenide[6] which is the subject of ongoing scientific research.[7]
See also
References
- ^ "Bismuth(III) selenide - PubChem Public Chemical Database". Pubchem.ncbi.nlm.nih.gov. 2011-10-21. Retrieved 2011-11-01.
- ^ a b c d "bismuth selenide | Bi2Se3". ChemSpider. Retrieved 2011-11-01.
- ^ a b "Bismuth Selenide | Bismuth Selenide". Espimetals.com. Retrieved 2011-11-01.
- ^ Mishra, S K; S Satpathy; O Jepsen (1997-01-13). "Electronic structure and thermoelectric properties of bismuth telluride and bismuth selenide". Journal of Physics: Condensed Matter. 9: 461–470. doi:10.1088/0953-8984/9/2/014. ISSN 0953-8984. Retrieved 2011-11-01.
- ^ Hor, Y. S.; A. Richardella; P. Roushan; Y. Xia; J. G. Checkelsky; A. Yazdani; M. Z. Hasan; N. P. Ong; R. J. Cava (2009-05-21). "p-type Bi_{2}Se_{3} for topological insulator and low-temperature thermoelectric applications". Physical Review B. 79 (19): 195208. doi:10.1103/PhysRevB.79.195208. Retrieved 2011-11-01.
- ^ Hsieh, D.; Y. Xia; D. Qian; L. Wray; J. H. Dil; F. Meier; J. Osterwalder; L. Patthey; J. G. Checkelsky; N. P. Ong; A. V. Fedorov; H. Lin; A. Bansil; D. Grauer; Y. S. Hor; R. J. Cava; M. Z. Hasan (2009). "A tunable topological insulator in the spin helical Dirac transport regime". Nature. 460 (7259): 1101–1105. doi:10.1038/nature08234. ISSN 0028-0836. PMID 19620959. Retrieved 2010-03-25.
- ^ Brumfield, Geoff (2010-07-14). "Topological insulators: Star material : Nature News". Nature. 466: 310–311. doi:10.1038/466310a. PMID 20631773. Retrieved 2010-08-06.