Molybdenum diselenide

Molybdenum diselenide
Molybdenum diselenide

Top-view atomic images of MoSe2 before and after (right) ion irradiation[1]
Names
IUPAC name
bis(selanylidene)molybdenum
Other names
molybdenum diselenide, molybdenumdiselenide, molybdenum selenide, diselanylidenemolybdenum, molybdenum(IV) selenide
Identifiers
3D model (JSmol)
ECHA InfoCard 100.031.831 Edit this at Wikidata
  • [Se]=[Mo]=[Se]
Properties
MoSe
2
Molar mass 253.86 g/mol[2]
Appearance crystalline solid
Density 6.90 g/cm3[2]
Melting point >1200 °C[2]
Band gap ~0.85 eV (indirect, bulk)
~1.5 eV (direct, monolayer)[3][4]
Structure
hP6, space group P6
3/mmc, No 194[5]
a = 0.3283 nm, c = 1.2918 nm
Trigonal prismatic (MoIV)
Pyramidal (Se2−)
Related compounds
Other anions
 Molybdenum dioxide
Molybdenum disulfide
Molybdenum ditelluride
Tantalum diselenide
Other cations
 Tungsten diselenide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Molybdenum diselenide (MoSe
2) is an inorganic compound of molybdenum and selenium. Its structure is similar to that of MoS
2.[6] Compounds of this category are known as transition metal dichalcogenides, abbreviated TMDCs. These compounds, as the name suggests, are made up of a transition metals and elements of group 16 on the periodic table of the elements. Compared to MoS
2, MoSe
2 exhibits higher electrical conductivity.[7]

  1. ^ Iberi, Vighter; Liang, Liangbo; Ievlev, Anton V.; Stanford, Michael G.; Lin, Ming-Wei; Li, Xufan; Mahjouri-Samani, Masoud; Jesse, Stephen; Sumpter, Bobby G.; Kalinin, Sergei V.; Joy, David C.; Xiao, Kai; Belianinov, Alex; Ovchinnikova, Olga S. (2016). "Nanoforging Single Layer MoSe2 Through Defect Engineering with Focused Helium Ion Beams". Scientific Reports. 6: 30481. Bibcode:2016NatSR...630481I. doi:10.1038/srep30481. PMC 4969618. PMID 27480346.
  2. ^ a b c Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.76. ISBN 1-4398-5511-0.
  3. ^ Yun, Won Seok; Han, S. W.; Hong, Soon Cheol; Kim, In Gee; Lee, J. D. (2012). "Thickness and strain effects on electronic structures of transition metal dichalcogenides: 2H-MX2 semiconductors (M = Mo, W; X = S, Se, Te)". Physical Review B. 85 (3): 033305. Bibcode:2012PhRvB..85c3305Y. doi:10.1103/PhysRevB.85.033305.
  4. ^ Kioseoglou, G.; Hanbicki, A. T.; Currie, M.; Friedman, A. L.; Jonker, B. T. (2016). "Optical polarization and intervalley scattering in single layers of MoS2 and MoSe2". Scientific Reports. 6: 25041. arXiv:1602.00640. Bibcode:2016NatSR...625041K. doi:10.1038/srep25041. PMC 4844971. PMID 27112195.
  5. ^ Agarwal, M. K.; Patel, P. D.; Joshi, R. M. (1986). "Growth conditions and structural characterization of MoSexTe2−x (0 ⩽ x ⩽ 2) single crystals". Journal of Materials Science Letters. 5: 66–68. doi:10.1007/BF01671439. S2CID 96858586.
  6. ^ Greenwood, N. N.; Earnshaw, A. (11 November 1997). Chemistry of the Elements. Elsevier. pp. 1017–1018. ISBN 978-0-08-050109-3.
  7. ^ Eftekhari, Ali (2017). "Molybdenum Diselenide (MoSe
    2    ) for Energy Storage, Catalysis, and Optoelectronics". Applied Materials Today. 8: 1–16. doi:10.1016/j.apmt.2017.01.006.