Bismuth selenide

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Bismuth selenide
CAS number 12068-69-8 YesY
PubChem 6379269
Jmol-3D images Image 1
Molecular formula 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]
Solubility in water insoluble
Solubility insoluble in organic solvents
soluble in strong acids [2]
Main hazards Toxic [3]
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

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[edit]


  1. ^ "Bismuth(III) selenide - PubChem Public Chemical Database". 2011-10-21. Retrieved 2011-11-01. 
  2. ^ a b c d "bismuth selenide | Bi2Se3". ChemSpider. Retrieved 2011-11-01. 
  3. ^ a b "Bismuth Selenide | Bismuth Selenide". Retrieved 2011-11-01. 
  4. ^ 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. 
  5. ^ 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. 
  6. ^ 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 (journal )|]] 460 (7259): 1101–1105. doi:10.1038/nature08234. ISSN 0028-0836. PMID 19620959. Retrieved 2010-03-25. 
  7. ^ 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.