AII-BVI Compounds: CdS

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AII-BVI Compounds: CdS

Description

CdS (cadmium sulfide) is a compound of cadmium and sulfur, belonging to the AII-BVI family of semiconductor materials. It is a direct bandgap semiconductor with a bandgap energy of around 2.4 eV, making it suitable for a range of optoelectronic applications, including photovoltaic cells, photoconductors, and photodiodes. CdS can be prepared by a variety of methods, including chemical vapor deposition, sputtering, and thermal evaporation. It has a cubic crystal structure, with a lattice constant of around 5.83 Å. CdS is also used in the production of blue and green phosphors for color TV tubes and other display devices.

Specification

Material	CdS
Growth methods:	Vertical Bridgman
Diameter, mm	40
Thickness, mm	30
Optical absorption (bulk) at 10,6 nm, cm^-1	< 0.007
Resistivity, Ohm x cm	-
Luminescent emission intensity ration, I_Ex/I_edge (I_imp)	-
Dislocation density, cm^-2	-
Small-angle boundary density, cm^-1	-
Excition band wavelength in luminescence spectrum, nm	490 ± 2
The variation of local values for wavelength within the plate, nm	-
The number of cavities with size of 15 - 200 m, pcs/pl	-

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