Tin selenide

Tin selenide
Names
Other names
Tin(II) selenide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.013.871 Edit this at Wikidata
EC Number
  • 215-257-6
UNII
  • InChI=1S/Se.Sn
    Key: MFIWAIVSOUGHLI-UHFFFAOYSA-N
  • InChI=1S/Se.Sn
  • [Se]=[Sn]
Properties
SnSe
Molar mass 197.67 g/mol
Appearance steel gray odorless powder
Density 5.75 g/cm3[1]
Melting point 861 °C (1,582 °F; 1,134 K)
negligible
Band gap 0.9 eV (indirect), 1.3 eV (direct)[2]
Structure
Orthorhombic, oP8[2]
Pnma, No. 62[2]
a = 4.4 Å, b = 4.2 Å, c = 11.5 Å[3]
Thermochemistry
-88.7 kJ/mol
Hazards
GHS labelling:
GHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard
Danger
H301, H331, H373, H410
P260, P261, P264, P270, P271, P273, P301+P310, P304+P340, P311, P314, P321, P330, P391, P403+P233, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oilInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
2
1
1
Safety data sheet (SDS) https://www.ltschem.com/msds/SnSe.pdf
Related compounds
Other anions
 Tin(II) oxide
Tin(II) sulfide
Tin telluride
Other cations
 Carbon monoselenide
Silicon monoselenide
Germanium selenide
Lead selenide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Tin selenide, also known as stannous selenide, is an inorganic compound with the formula SnSe. Tin(II) selenide is a typical layered metal chalcogenide[4] as it includes a group 16 anion (Se2−) and an electropositive element (Sn2+), and is arranged in a layered structure. Tin(II) selenide is a narrow band-gap (IV-VI) semiconductor structurally analogous to black phosphorus. It has received considerable interest for applications including low-cost photovoltaics, and memory-switching devices.

Because of its low thermal conductivity as well as reasonable electrical conductivity, tin selenide is one of the most efficient thermoelectric materials.[5][6]

  1. ^ "Supplementary Information - Facile chemical synthesis and enhanced thermoelectric properties of Ag doped SnSe nanocrystals" (PDF). www.rsc.org.
  2. ^ a b c Cite error: The named reference wire was invoked but never defined (see the help page).
  3. ^ Persson, Kristin (2014). "Materials Data on SnSe (SG:62) by Materials Project". LBNL Materials Project; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). doi:10.17188/1284598. Retrieved 2020-08-07.
  4. ^ Zhang, Chunli; Yin, Huanhuan; Han, Min; Dai, Zhihui; Pang, Huan; Zheng, Yulin; Lan, Ya-Qian; Bao, Jianchun; Zhu, Jianmin (2014). "Two-Dimensional Tin Selenide Nanostructures for Flexible All-Solid-State Supercapacitors". ACS Nano. 8 (4): 3761–70. doi:10.1021/nn5004315. PMID 24601530.
  5. ^ Zhao, L. D.; Lo, S. H.; Zhang, Y; Sun, H; Tan, G; Uher, C; Wolverton, C; Dravid, V. P.; Kanatzidis, M. G. (2014). "Ultralow thermal conductivity and high thermoelectric figure of merit in SnSe crystals". Nature. 508 (7496): 373–7. Bibcode:2014Natur.508..373Z. doi:10.1038/nature13184. PMID 24740068. S2CID 205238132.
  6. ^ Kang, Joon Sang; Wu, Huan; Li, Man; Hu, Yongjie (2019). "Intrinsic Low Thermal Conductivity and Phonon Renormalization Due to Strong Anharmonicity of Single-Crystal Tin Selenide". Nano Letters. 19 (8): 4941–4948. Bibcode:2019NanoL..19.4941K. doi:10.1021/acs.nanolett.9b01056. PMID 31265307. S2CID 206750455.