Zinc telluride

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Zinc telluride
The unit cell of a zinc telluride crystal.
Identifiers
3D model (
JSmol
)
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UNII
  • [TeH+2]12[ZnH2-2][TeH+2]3[ZnH2-2][TeH+2]([ZnH-2]14)[ZnH-2]1[Te+2]5([ZnH-2]38)[Zn-2]26[TeH+2]2[ZnH-2]([Te+2]4)[TeH+2]1[ZnH2-2][TeH+2]3[ZnH-2]2[Te+2][ZnH-2]([TeH+2]6[ZnH-2]([TeH+2])[TeH+2]68)[TeH+2]([ZnH2-2]6)[ZnH-2]35
Properties
ZnTe
Molar mass 192.99 g/mol[1]
Appearance red crystals
Density 6.34 g/cm3[1]
Melting point 1,295 °C; 2,363 °F; 1,568 K[1]
Band gap 2.26 eV[2]
Electron mobility 340 cm2/(V·s)[2]
Thermal conductivity
 108 mW/(cm·K)[1]
3.56[2]
Structure
Zincblende
(cubic)
F43m[1]
a = 610.1 pm[1]
Tetrahedral (Zn2+)
Tetrahedral (Te2−)[1]
Thermochemistry
264 J/(kg·K)[1]
Related compounds
Other anions
 Zinc oxide
Zinc sulfide
Zinc selenide
Other cations
 Cadmium telluride
Mercury telluride
Related compounds
 Cadmium zinc telluride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Zinc telluride is a binary

p-type semiconductor. Its crystal structure is cubic, like that for sphalerite and diamond.[1]

Properties

STM images of the ZnTe(110) surface, taken at different resolutions and sample rotation, together with its atomic model.[3]

ZnTe has the appearance of grey or brownish-red powder, or ruby-red crystals when refined by sublimation. Zinc telluride typically has a cubic (sphalerite, or "

thin-film solar cells. In the wurtzite (hexagonal) crystal structure, it has lattice parameters a = 0.427 and c = 0.699 nm.[5]

Applications

Optoelectronics

Zinc telluride can be easily

CdTe/ZnTe structure[6] or in PIN diode
structures.

The material can also be used as a component of ternary semiconductor compounds, such as CdxZn(1-x)Te (conceptually a mixture composed from the end-members ZnTe and CdTe), which can be made with a varying composition x to allow the optical bandgap to be tuned as desired.

Nonlinear optics

Zinc telluride together with

terahertz imaging. When a crystal of such material is subjected to a high-intensity light pulse of subpicosecond duration, it emits a pulse of terahertz frequency through a nonlinear optical process called optical rectification.[7] Conversely, subjecting a zinc telluride crystal to terahertz radiation causes it to show optical birefringence
and change the polarization of a transmitting light, making it an electro-optic detector.

compound semiconductors. By adding manganese
as an additional dopant (ZnTe:V:Mn), its photorefractive yield can be significantly increased.

References

  1. ^
    ISBN 1-4398-5511-0
    .
  2. ^
    ISBN 1-4398-5511-0
    .
  3. PMID 27877752
    .
  4. ^ O'Dell, Dakota (2010). MBE Growth and Characterization of ZnTe and Nitrogen-doped ZnTe on GaAs(100) Substrates, Department of Physics, University of Notre Dame.
  5. ^ Kittel, C. (1976) Introduction to Solid State Physics, 5th edition, p. 28.
  6. doi:10.1016/j.solmat.2007.04.006
    .
  7. ^ THz Generation and Detection in ZnTe. chem.yale.edu

External links

Wikimedia Commons has media related to Zinc telluride.
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