CZT (CdZnTe) Wafers and Substrates

Excellent electrical properties, low dark current, and superior thermal stabilities
For epitaxial growth of HgCdTe (MCT)
Cutting-edge choice for IR detectors (IR Transmission≥60%)
Room temperature operation
Surface Roughness(Ra)≤0.5nm
Application fields: semiconductor radiation detectors, photorefractive gratings, electro-optic modulators, solar cells, and terahertz generation

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Specifications:

Materials	Cd1-xZnxTe，x=0.04	Type	p-type
Size(mm³)	14×14×1.3, 10×10×1	Index of Crystal Face	(111), (211)
Orientation and Accuracy	Low index surface orientation, Orientation Accuracy ≤0.3°	Resistivity	ρ＞10⁶ Ω·cm
IR Transmission%	≥60%	Infrared Imaging	Te inclusions≤ 2μm or Cd inclusions≤2μm
X-ray DCRC FWHM(FWHM)	≤30 rad·s	Average Etch Pit density(EPD)	1x10⁴/cm² ~ 5x10⁴/cm²
Surfaces Roughness	Ra≤0.5 nm	Packaging	class 1000 clean room, vacuum packaging
Storage Temperature	22 ℃ ~ 25 ℃	Storage Humidity	45% ~ 60%

Cadmium Zinc Telluride (CZT /CdZnTe) Substrate, is a compound of cadmium, zinc, and tellurium with excellent electrical properties, low dark current, and superior thermal stabilities.

Due to its similar lattice constant to HgCdTe (MCT), the CdZnTe (CZT) substrate is a traditional option for HgCdTe (MCT) epitaxial thin film growth. And owing to the MCT epitaxial thin film’s transmittance to infrared (IR) wavelengths, despite the difficulties in growing a large area of affordable high-quality substrates, CZT wafers remain the best choice for infrared detectors, photorefractive gratings, electro-optic modulators, solar cells, and terahertz generators.

As a direct bandgap semiconductor with high atomic numbers, infrared devices based on CZT substrates continue to be the cutting-edge choices in the market in terms of sensitivities and being reliable. CZT substrates offer effective conversion of photons to electrons with high resolutions as a media of radiation detection, facilitating various tasks including medical imaging, scientific research, and industrial inspection. Also, unlike some other materials (in particular Ge) which require liquid nitrogen cooling, radiation detectors using CZT can operate in direct-conversion (or photoconductive) mode at room temperature. The low dark current makes CZT substrates advantageous in conditions where light is insufficient, and the thermal stabilities render them suitable for high-temperature environments.

Hangzhou Shalom EO offers custom CZT substrates and wafers according to the customer's request, with a fine surface roughness of less than 0.5nm, packaged in class 1000 clean room vacuum packaging.