By Robert Triboulet, Paul Siffert
Virtually thirty years after the notable monograph of ok. Zanio and the various meetings and articles committed on account that that point to CdTe and CdZnTe, in any case the numerous progresses in that box and the expanding curiosity in those fabrics for numerous tremendous appealing commercial purposes, akin to nuclear detectors and sunlight cells, the variation of a brand new enriched and up to date monograph devoted to those very topical II-VI semiconductor compounds, masking all their so much in demand, glossy and primary points, appeared very suitable and invaluable. specified assurance of the most subject matters linked to the very topical II-VI semiconductor compound CdTe and its alloy CZTReview of the CdTe contemporary advancements basic heritage of many subject matters sincerely brought and uncovered
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Additional resources for CdTe and Related Compounds; Physics, Defects, Hetero- and Nano-structures, Crystal Growth, Surfaces and Applications, 1st Edition
CdTe single crystals were also grown in horizontal open systems either from Cd and Te2 vapors using H2 as a carrier gas , or from a polycrystalline charge using N2 or Ar as a carrier gas . 4. Solid state recrystallization Solid state recrystallization (SSR) appears as an attractive and promising alternative to the melt, vapor, and solution growth. In this process, strains intentionally introduced in a polycrystalline source are then released by high-temperature thermal annealing. The structure tends toward the state of lower potential energy, which is the single crystal through the motion of dislocations and grain boundaries.
This arrangement enables several passes to be carried out in the same ampoule without any handling of the material between each pass. Very pure crystals were reported to be obtained by 42 R. Triboulet this MTHM technique, as expressed by electrical, chemical, and optical measurements. One of the main problems faced in the growth of CdTe single crystals by THM is the strong convection in the liquid zone, due to the high temperature gradients used, which adversely affects the quality of the grown crystals.
Some “print” in the crystals of the furnace metallic heating elements, such as Ni, Fe, and Mn, can be found in the crystals according to the furnace technology. A reduction of the contamination from the container can arise in case of use of high-purity, high-density graphite or pyrolytic BN (pBN) crucibles. Nevertheless, when such crucibles are loaded in silica tubes, contamination from silica or through the silica walls is not completely eliminated. Influence of ampoule coatings on CdTe solidification has been demonstrated from dislocation density measurements .