Zinc telluride
Crystal structure | ||||||||||||||||
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__ Zn 2+ __ Te 2− | ||||||||||||||||
General | ||||||||||||||||
Surname | Zinc telluride | |||||||||||||||
Ratio formula | ZnTe | |||||||||||||||
Brief description |
red-brown, red crystals |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 192.97 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
6.34 g cm −3 |
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Melting point |
1240 ° C |
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safety instructions | ||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Zinc telluride (ZnTe) is a crystalline compound from the group of tellurides , which is formed from zinc and tellurium with a (cubic) zinc blende - crystal structure ( space group F 4 3 m (space group no. 216) ).
Extraction and presentation
Zinc telluride can be extracted directly from the elements at 800–900 ° C in a vacuum.
properties
Zinc telluride is a gray powder that turns red when rubbed. It is durable when exposed to moisture. Water and dilute acids decompose it with the formation of hydrogen telluride.
In its crystalline form it is a direct semiconductor with a band gap of 2.23 to 2.25 eV and is one of the II-VI compound semiconductors .
use
Zinc telluride can be easily doped and is used as a material in the field of optoelectronics for the production of blue light-emitting diodes , laser diodes and solar cells . It is also used in combination with cadmium telluride (CdTe) in pin diodes in electronic high-frequency circuits .
In combination with cadmium, zinc telluride serves as the basis for ternary semiconductors such as Cd x Zn (1 − x) Te, which allows the band gap, and thus the optical properties, to be modeled through different mixing ratios.
In addition to lithium niobate , it is used in the field of non-linear optics to generate terahertz radiation through optical rectification .
Related links
- Mercury (II) cadmium (II) telluride ((Hg, Cd) Te)
- Mercury Telluride (HgTe)
- Cadmium Selenide (CdSe)
- Cadmium zinc telluride ((Cd, Zn) Te)
Individual evidence
- ↑ a b Zinc telluride at webelements.com, accessed on Jan. 19, 2012 .
- ↑ a b c d Zinc telluride data sheet from AlfaAesar, accessed on July 10, 2011 ( PDF )(JavaScript required) .
- ↑ a b Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 1030.
- ↑ Nowshad Amin, Kamaruzzaman Sopian, Makoto Konagai: Numerical modeling of CdS / CdTe and CdS / CdTe / ZnTe solar cells as a function of CdTe thickness , Solar Energy Materials and Solar Cells , Vol. 91, No. 13, August 15, 2007 , Pp. 1202-1208