Zinc Selenide (ZnSe) Semiconductors

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Topics Covered

Description
Applications
Chemical Properties
Electrical Properties
Thermal, Mechanical and Optical Properties
Safety Information

Description

Zinc selenide is a light yellow binary solid compound that rarely occurs in nature. It is a chemically inert, non-hygroscopic and highly pure material largely found in the mineral stilleite. It is effective in many optical applications owing to its high resistance to thermal shock, stability in virtually all environments and extremely low bulk losses.

Applications

Zinc selenide finds applications in the following:

• Light emitting diodes
• Infrared laser gain medium
• X-ray and gamma ray detectors
• Optical windows
• Lenses
• Mirrors.

Chemical Properties

The chemical properties of zinc selenide are provided in the table below:

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Chemical Properties Chemical Formula ZnSe Molecular Weight 144.35 CAS No. -09-9 Group Zinc &#; 12
Selenium - 16 Crystal Structure Cubic Lattice Constant 5. Å

Electrical Properties

The electrical properties of zinc selenide are provided in the table below:

Electrical Properties Dielectric Constant 9.2 Band Gap 2.58 eV Electron Mobility 540 cm2/Vs Hole Mobility 28 cm2/Vs

Thermal, Mechanical and Optical Properties

The thermal, mechanical and optical properties of zinc selenide are provided in the tables below:

Thermal Properties Heat of Formation 422 kJ/mol Thermal Expansion Coefficient 720 µm/m°C Specific Heat Capacity 0.339 J/g°C Thermal Conductivity 14 W/mK Mechanical Properties Melting Point °C Density 5.42 g/cm3 Young&#;s Modulus 67.2 GPa Bulk Modulus 40 GPa Poisson Ratio 0.28 Knoop Microhardness Optical Properties Transmission Range 0.5 &#; 20 microns Refractive Index 2.89

Safety Information

Safety Information GHS Hazard Statements H301 - Toxic if swallowed
H331 - Toxic if inhaled
H373 - May cause damage to organs through prolonged or repeated exposure
H410 - Very toxic to aquatic life with long lasting effects. Safety Precautions P261 - Avoid breathing dust/ fume/ gas/ mist/ vapors/ spray
P273 - Avoid release to the environment
P301 + P310 - IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
P311 - Call a POISON CENTER or doctor/ physician
P501 - Dispose of contents/ container to an approved waste disposal plant.

 

Most of these lenses are not headed for thermal infrared pictures but mostly centered to focal C02 lasers and the sellers, sadly don't know jack, as these usually just wholesalers, placing an order at third party on my behalf.



But its a 20mm GaAs at 15 USD delivered with a focal length at 4" 101.6 mm.
I can see he also has them in 1½" and 2" and 3" focal length..(so I reckon I could change it for a lower focal length if that was the obvious sum)
and I already have a ZnSE (cheap China orange version in 50mm FL and I reckon for variety purpose I would mix it up with a wider FL to see if there was any gain there, but on the other hand 101.5mm focal length would more or less be around the native lens in Seek pro as it seems to focus down to relative 10 to 15cm at closest point, so any gain for thermal-macro on a GaAs at 10.16CM FL?' here it would likely make more sense to go with the smallest focal length possible on these GaAs lenses' or ??)

But been pretty impressed with my cheap 8USD 50mm focal length ZnSE lens and its macro-ability and I love to fool around with wavelengths in different laser'diodes and here many of these lenses have wicked abilities to pass some wavelength and block others and so forward, not least ZnSE there are willing to pass high NM green and up, like yellow and red etc, but completely blocks blue and violet and partly low'end'nm green wavelengths...
https://imgur.com/a/xipfTdn

What you reckon' any info to sense if this GaAs lens will be doable to thermal macro?? or is it a luck of a draw if it got the useable LWIR coating but then again 90% clear aperature 10.6um.

Thx for your feedback..Im im not sure what kind of coating this one carries.it states 0.5% pr surface for AR coating.Most of these lenses are not headed for thermal infrared pictures but mostly centered to focal C02 lasers and the sellers, sadly don't know jack, as these usually just wholesalers, placing an order at third party on my behalf.But its a 20mm GaAs at 15 USD delivered with a focal length at 4" 101.6 mm.I can see he also has them in 1½" and 2" and 3" focal length..(so I reckon I could change it for a lower focal length if that was the obvious sum)and I already have a ZnSE (cheap China orange version in 50mm FL and I reckon for variety purpose I would mix it up with a wider FL to see if there was any gain there, but on the other hand 101.5mm focal length would more or less be around the native lens in Seek pro as it seems to focus down to relative 10 to 15cm at closest point, so any gain for thermal-macro on a GaAs at 10.16CM FL?' here it would likely make more sense to go with the smallest focal length possible on these GaAs lenses' or ??)But been pretty impressed with my cheap 8USD 50mm focal length ZnSE lens and its macro-ability and I love to fool around with wavelengths in different laser'diodes and here many of these lenses have wicked abilities to pass some wavelength and block others and so forward, not least ZnSE there are willing to pass high NM green and up, like yellow and red etc, but completely blocks blue and violet and partly low'end'nm green wavelengths...What you reckon' any info to sense if this GaAs lens will be doable to thermal macro?? or is it a luck of a draw if it got the useable LWIR coating but then again 90% clear aperature 10.6um.

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