Zinc cadmium phosphide arsenide

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Zinc cadmium phosphide arsenide (

semiconductor materials. The quaternary system of II3V2 compounds, (Zn1−xCdx)3(P1−yAsy)2, has been shown to allow solid solution continuously over the whole compositional range.[1] This material system and its subsets have applications in electronics, optoelectronics, including photovoltaics, and thermoelectrics.[2]

List of all binary compounds

This system of elements contains numerous binary compounds and their solid solutions.

Stable at atmospheric pressure

The binary compounds thermodynamically stable at atmospheric pressure are listed in the following table:[1][3]

Anion 
Cation
 P As
Zn
  • α″ (or α) and β[4]
  • α and β[4]
  • α, α′ and β[5]
  • one polymorph[5]
Cd
  • α, α′, α″ and β[3]
  • α and δ[3]

Metastable or unstable at atmospheric pressure

Compounds metastable or unstable at atmospheric pressure are the following:

Anion 
Cation
 P As
Zn
  • ZnP2
  • ZnP4
  • Zn7P10
  • Zn3P2
  • Zn3As2
  • ZnAs
  • high-pressure phase
  • high-pressure phase, low and high-temperature polymorphs
Cd
  • Cd3P2
  • high-pressure phase
  • Cd3As2
  • CdAs
  • CdAs4
  • high-pressure phase
  • high-pressure phase, low and high-temperature polymorphs
  • [3]

Quaternary compounds

The compounds of the form II3V2 have similar crystalline structures and exhibit full solid solution over the whole compositional range. The compounds of the form II-V2 allow only partial solid solution.[3]

Ternary compounds

The binary compounds in this system form a wide range of solid solutions. This miscibility reflects the close similarity of the structures of the binary phases. The IIV2 compounds exhibit wide solid solution ranges with CdP4 even though the stoichiometry and structures of the components differ.[3]

The optoelectronic and band properties of some ternary compounds have also been studied. For example, the bandgap of Zn3(P1−yAsy)2 solid solutions is direct and tunable from 1.0 eV to 1.5 eV. This solubility enables the fabrication of tunable nanowire photodetectors.[8] The solid solution (Zn1−xCdx)3As2 exhibit a topological phase transition at x ~ 0.62.[9]

Notable binary compounds

Cadmium arsenide (Cd3As2)

Main article: Cadmium arsenide

Cadmium arsenide is a 3D Dirac semimetal exhibiting the Nernst effect.

Zinc phosphide (Zn3P2)

Main article: Zinc phosphide

Zinc phosphide is a semiconductor material with a direct band gap of 1.5 eV[10] used in photovoltaics.[11] It is also used as a rodenticide in the pest control industry.

Zinc arsenide (Zn3As2)

Main article: Zinc arsenide

Zinc arsenide is a semiconductor material with a band gap of 1.0 eV.[12]

References

  1. ^
    S2CID 94409384
    .
  2. doi:10.1016/0960-8974(92)90030-T
    .
  3. ^ a b c d e f Yakimovich, V. N.; Rubtsov, V. A.; Trukhan, V. M. (1996). "Phase equilibria in the Zn-P-As-Cd System". Inorganic Materials. 32 (7): 705–709.
  4. ^
    S2CID 140792691
    .
  5. ^ a b Okamoto, H. (1992). "The As-Zn (Arsenic-Zinc) System". Journal of Phase Equilibria. 13 (2).
  6. ^ Berak, J.; Pruchnik, Z. (1971). "Phase Equilibria in the Zinc-Cadmium-Phosphorus System. Part III. The Cd3P2-Zn3P2 System". Roczniki Chemii. 45: 1425.
  7. ^
    PMID 12428990
    .
  8. PMID 25602167
    .
  9. PMID 28600553
    .
  10. ISSN 0003-6951
    .
  11. doi:10.1063/1.92124
    .
  12. doi:10.1063/1.371569
    .

External links

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