| Zinc selenide | |
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Other names
Zinc selenide |
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| Identifiers | |
| CAS number | 1315-09-9 |
| PubChem | 4298215 |
| Properties | |
| Molecular formula | ZnSe |
| Molar mass | 144.35 g/mol |
| Appearance | light yellow solid |
| Density | 5.27 g/cm3 |
| Melting point |
1525 °C |
| Solubility in water | negligible |
| Band gap | 2.82 eV (10 ºK) |
| Refractive index (nD) | 2.67 (550 nm) 2.40 (10.6 µm) |
| Structure | |
| Crystal structure | Zincblende (cubic) |
| Lattice constant | a = 566.8 pm |
| Coordination geometry |
Tetrahedral (Zn2+) Tetrahedral (Se2−) |
| Thermochemistry | |
| Std enthalpy of formation ΔfH |
−177.6 kJ/mol |
| Hazards | |
| EU Index | 034-002-00-8 |
| EU classification | Toxic (T) Dangerous for the environment (N) |
| R-phrases | R23/25, R33, R50/53 |
| S-phrases | (S1/2), S20/21, S28, S45, S60, S61 |
| Related compounds | |
| Other anions | Zinc oxide Zinc sulfide Zinc telluride |
| Other cations | Cadmium selenide Mercury selenide |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Zinc selenide (ZnSe), is a light yellow binary solid compound. It is an intrinsic semiconductor with a band gap of about 2.70 eV at 25 °C. ZnSe rarely occurs in nature. It is found in the mineral stilleite named after Hans Stille.
Contents |
ZnSe can be made in both hexagonal (wurtzite) and cubic (zincblende) crystal structure.
It is a wide-bandgap semiconductor of the II-VI semiconductor group (since zinc and selenium belong to the 2nd and 6th groups of the periodic table, respectively). The material can be doped n-type doping with, for instance, halogen elements. P-type doping is more difficult, but can be achieved by introducing nitrogen.
ZnSe is insoluble in water, but reacts with acids to form toxic hydrogen selenide gas.
It can be deposited as a thin film by chemical vapour deposition techniques including MOVPE and vacuum evaporation.
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