Zinc Sulfide (ZnS) Substrates

university wafer substrates

Zinc Sulfide Wafers Photon Absorption

A PhD candidate requested a quote for the following.

We need single crystal of ZnS because we want two two photon and three
photon absorption in this material.

Please send me the quote for single crystal of ZnS with size (Dia 5 mm,
thick 0.3 mm, orientation <111>). If the price does increase significantly with size we would like to know the price of single crystal of ZnS with size (Dia 10 mm, thick 0.3 mm, <111>).

Could you please send me also a quote for Single crystal of ZnO with the
same size and orientation <0001>. The quantity is one crystal from each type.

I never tested the two photon absorption in ZnS crystal with orientation (110). But if you are absolutely sure that this orientation will work, we will order the wafer. if you have any information about the efficiency of 2 photon absorption at (110) compared to that at (111) please send it to me.

Reference #96178 for specs and pricing.

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Zinc Sulfide (ZnS) Wafers for Optical Purposes

An aeronautical engineer requested a quote for the following.

We need the following undoped ZnS specs to use for optical purposes.

We are ready to supply ZnS wafers with diameter 38.1+/-0.1mm X thickness 2+/-0.1mm, two sides polished 60/40 (Scr/Dig):

Reference #100020 for specs and pricing.

ZnS Substrates Used To Fabricate A CO2 Laser

An engineering student requested the following quote.

I am an engineering student and am involved in building a CO2 laser. I am interested to see if I can acquire some ZnSe or ZnS blanks from your company to use as infrared windows in this project. I am not too picky about size or thickness, and also don't care if the blanks are polished. I am more interested in something that is affordable... Please let me know if this is something that you can assist me with.

Reference #108479 for specs and pricing.

Semi-Insulating Zinc Sulfide Wafers

A postdoc requested a quote for the following.

I am interested in acquiring a small number of semi-insulating ZnS wafers. I was wondering what you may have in stock?

UniversityWafer, Inc. Quoted:

ZnS (110) 10x10x1.0mm, DSP

Reference #116681 for specs and pricing.

Zinc Sulfide Sphaleite Substrates 

A postdoc requested a quote for the following.

I've never purchased sphalerite wafer before, but I noticed that you had ZnS wafers for sale on your website. Would you please tell me what kind of ZnS wafer you have? Please send us the details of your ZnS wafer. Thanks a lot.

We want some sphalerite wafers. I just checked your website and noticed that you have both N- and P- plane sphaleite wafers with one-side or two-sides polished. However I didn't find the information about the sizes of the wafers and the prices. Would you please send us more information about sphalerite wafers you have? We will really appreciate if you can send us the information about the size, the price, the orientation, the material of the substrate if you use and the thickness of the sphalerite layer of the sphalerite wafers.

Reference #103087 for specs and pricing.

What is Sphalerite Wafers?

A sphalerite wafer refers to a wafer made from sphalerite-structured materials, typically zinc sulfide (ZnS) or zinc selenide (ZnSe). Sphalerite is the cubic crystal structure of these materials, as opposed to the wurtzite (hexagonal) phase.

Key Features of Sphalerite Wafers:

  1. Material Composition:

    • ZnS (Zinc Sulfide): Used in optical applications, UV detectors, and phosphors.
    • ZnSe (Zinc Selenide): Often used in infrared optics, electroluminescent devices, and semiconductor lasers.

  2. Crystal Structure:

    • The sphalerite phase is cubic (similar to diamond), making it suitable for certain optical and electronic applications.
    • This structure provides high optical transparency in visible and infrared regions.

  3. Applications:

    • Optoelectronics: Used in light-emitting diodes (LEDs) and laser diodes.
    • Infrared Optics: ZnSe wafers are used in CO₂ laser optics due to their transparency in the infrared spectrum.
    • Photodetectors: ZnS sphalerite wafers can be used for UV-sensitive photodetectors.
    • Electroluminescent Devices: ZnSe-based wafers are used in thin-film electroluminescent displays.

  4. Growth and Fabrication:

    • Typically grown using chemical vapor deposition (CVD) or molecular beam epitaxy (MBE).
    • The wafers can be doped with elements like nitrogen or copper for enhanced electronic properties.

What Are Zinc Sulfide (ZnS) Substrates Applications?

Think about what powers your favorite high-tech tools; chances are zinc sulfide’s standout optical-electrical-mechanical traits are key players behind the scenes. Some of the notable uses include:

  1. Optical Components: ZnS is widely used in the manufacturing of infrared windows and lenses because of its high transmittance in the infrared spectrum. Moreover, its clarity in the part of the spectrum we can see with our eyes makes it ideal for high-tech optics that serve multiple purposes.

  2. Thin-Film Coatings: ZnS substrates serve as a base for thin-film coatings, often used in optics for anti-reflective, dielectric, and protective layers.

  3. Electroluminescent Devices: ZnS is a primary material in electroluminescent devices due to its capability scientific illustration of a zinc selenide (ZnSe) electroluminescent device.to emit light when excited electrically or optically.

  4. Phosphors and Luminescent Materials: It is used as a phosphor host material in display devices and lighting systems. Spice up ZnS with some extra ingredients and voilà – you get luminescence that’s perfect for lighting up screens on everything between classic tube TVs and energy-efficient LEDs.

  5. Photonic Applications: ZnS is used in photonic applications like optical waveguides due to its good refractive properties and transparency.

  6. Surface Acoustic Wave (SAW) Devices: ZnS substrates are sometimes used in SAW devices due to their piezoelectric properties when doped.

If you've ever marveled at crystal-clear images through a lens or depended on cutting-edge technology in sensitive equipment; chances are, ZnS substrates played a part behind the scenes.

ZnS Substrates Transmissive In The Visible

A researcher requested a quote for the following.

We need Zinc Sulfide wafers that are transmissive in the visible (multispectral, cleartran, etc).

  • Is this cleartran/multi-spectral ZnS?
  • What is the transmission in the visible?
  • How is the material grown? 
  • CVD?
  • Scratch and Dig?

II-VI crystals are likely to shoot in prominence in the near future.  Their direct band gap nature, their large range of transparency, and  the availability of a wide choice of band gap offer interesting device possibilities.  MTI is able to offer high quality  II-V single crystals as the follows at reasonable price.

Properties

CdS

CdTe

Cd 1-x ZnxTe  

ZnS

ZnTe

ZnSe

Growth Mehod

PVT

PVT

Bridgeman

Bridgeman

Bridgeman

CVD

Structure

Hexagonal

Cubic

Cubic

Cubic

cubic

Cubic

Lattice Constant (A)

a=4.1367 c=6.7161

a = 6.483

a=6.486

 

5.420

6.103

a= 5.6685

Density ( g/cm3)

4.821

5.851

5.851

4.08

5.633

5.264

Melting Point (oC)

1287

1047

1045

1830

1239

1517

Heat Capacity  (J /g.k)

0.3814

0.210

0.210

0.469

0.16

0.339

Thermal Expans. (10-6/K)

4.6 // a 2.5 // c

5.0

5.0

6.8

8.0

7.1

Thermal Conductivity

( W /m.k at 300K )

2.7

6.3

 

0.16

 

13

Transparent wavelength ( um)

2.5 ~ 15

(>71%)

0.85 ~ 29.9

(>66%)

 

2 -12

(>71%)

7 -12

(>66%)

0.51 ~ 19.0

(>71%)

Refractive Index

1.708 (o)

1.723 (e)

2.72

 

2.4

2.7

2.5

E-OCoeff. (m/V) at 10.6

 

6.8x10-12

 

2.0x10-12

4.0x10-12

6.1x10-12

Max. size  (mm )

25x25x15

25 x 10 x 10

 40 x 40 x 10

40d x40h

40d x40h

25x25x15

Reference #123399 for specs and pricing.