Abstract
CdTe layers are obtained upon substrates from (111) Ge and (0001) CdS with a thickness of 30–40 μm. The hollow crystals, observed upon those layers, are studied with a scanning electron microscope in the regime of secondary electron emission. Electron photomicrographs were taken of separate crystals, as well as of some of their details. The CdTe layer surface is completely covered with hollow crystals, whose density reaches sometimes 1.5 × 10 3 cm -2. The hollow crystals observed are composed of a whisker-needle with a transition into a cone (pyramid), terminating with a hexahedral prism. Hollow crystals with an “open” and a “closed” lateral surface are observed. The appearance of new planes upon the upper surface of the hollow crystals is an interesting peculiarity, the planes blunting the edges, which might be the transition to the closing of the hollow crystals. An attempt was made for a partial explanation of the growth mechanism of the described CdTe hollow crystals.
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