Zinc arsenide (Zn3As2) is a binary compound of zinc with arsenic which forms gray tetragonal crystals. It is an inorganic semiconductor with a band gap of 1.0 eV.[2]
Synthesis and reactions
Zinc arsenide can be prepared by the reaction of zinc with arsenic
- 3 Zn + 2 As → Zn3As2
Structure
Zn3As2 has a room-temperature tetragonal form that converts to a different tetragonal phase at 190 °C and to a third phase at 651 °C.[3] In the room-temperature form, the zinc atoms are tetrahedrally coordinated and the arsenic atoms are surrounded by six zinc atoms at the vertices of a distorted cube. The crystalline structure of zinc arsenide is very similar to that of cadmium arsenide (Cd3As2), zinc phosphide (Zn3P2) and cadmium phosphide (Cd3P2). These compounds of the Zn-Cd-P-As quaternary system exhibit full continuous solid-solution.[4]
Electronic structure
Its lowest direct and indirect bandgaps are within 30 meV of each other.[2]
References
- ^ a b c d "LTS Research Laboratories, Inc. Safety Data Sheet: Zinc Arsenide" (PDF). ltschem.com. Retrieved 2020-10-26.
- ^ a b Botha, J. R.; Scriven, G. J.; Engelbrecht, J. A. A.; Leitch, A. W. R. (1999). "Photoluminescence properties of metalorganic vapor phase epitaxial Zn3As2". Journal of Applied Physics. 86 (10): 5614–5618. Bibcode:1999JAP....86.5614B. doi:10.1063/1.371569.
- ^ Okamoto, H. (1992). "The As-Zn (arsenic-zinc) system". Journal of Phase Equilibria. 13 (2): 155–161. doi:10.1007/BF02667479. S2CID 98798806.
- ^ Trukhan, V. M.; Izotov, A. D.; Shoukavaya, T. V. (2014). "Compounds and solid solutions of the Zn-Cd-P-As system in semiconductor electronics". Inorganic Materials. 50 (9): 868–873. doi:10.1134/S0020168514090143. S2CID 94409384.