Partial pressure monitoring in cadmium telluride vapour growth

Point defects and diffusion in cadmium telluride

“…Even if the most sensitive line is the 220 nm line, the 325 nm line is usually exploited, because, in the case of measurements in the UV, the more the photon energy increases, the more the experiments become complicated. The Te 2 vapors, in contrast, present a large absorption band ranging from 350 to 600 nm [55]. Different systems have been used as light sources and wavelength discriminators: a white lamp and a monochromator [13,54], a Cd discharge lamp with optical filters [55] and a laser source with optical filters [56e58].…”

Off stoichiometry determination in cadmium telluride crystals

“…Partial vapour pressure measurements of both Cd and Te 2 species can be made by measuring the optical absorption of the vapours at different wavelengths [9,10]. The arrangement is shown in Fig.…”

Off-stoichiometry determination of II–VI bulk crystals

“…[13]. While the absorption spectrum of monoatomic gas species (like Cd) is characterized by sharp lines, the diatomic gas one (like Te 2 , Se 2 and S 2 ) presents broad absorption bands in the visible-near ultraviolet region [10,14]. Any optical source operating at a wavelength in the broad absorption range can be used for the vapor pressure measurements.…”