Amorphous Chalcogenide Semiconductors and Related Materials by Keiji Tanaka

By Keiji Tanaka

Amorphous Chalcogenide Semiconductors and comparable Materials describes advancements within the technology and know-how of this advancing type of fabrics. This booklet bargains an up to date remedy of chalcogenide glasses, amorphous semiconductors, and photonics glasses from uncomplicated rules via to purposes, whereas supplying the reader with solid-state sciences for knowing the fabric estate and expertise. Chalcogenide glasses have a few attention-grabbing and beneficial homes, that have been already exploited within the commercialization of recent units. The publication describes them at size, whereas it additionally:

  • Discusses technological purposes comparable to nonlinear optical fibers, DVDs, and excessive answer mammographic x-ray photograph detectors
  • Includes insurance of noncrystalline semiconductors with glassy semiconductors

Amorphous or glassy chalcogenides are one of those noncrystalline and thermodynamically quasi-stable solids. Such fabrics own completely different houses than crystalline solids, and hence warrant distinctive dialogue and outline, which Amorphous Chalcogenide Semiconductors and similar Materials provides.

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Extra info for Amorphous Chalcogenide Semiconductors and Related Materials

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EXAFS study of mechanical-milling-induced solid-state amorphization of Se. J. Non-Cryst. : Gex S1−x glasses. II. Synthesis conditions and defect formation. J. Non-Cryst. C. ): Selenium. Van Nostrand Reinhold Company, New York, NY (1974) Chapter 2 Structure Abstract Atomic and microscopic structures of chalcogenide glasses are discussed from theoretical and experimental points of view. Starting with discussion on an ideal glass structure, we will see continuous studies performed for grasping atomic structures in disordered materials.

For instance, the data denoted as Si(Ge) in (a) show, from O to Te, the ionicities of Si(Ge)–O, Si(Ge)–S, Si(Ge)–Se, and Si(Ge)–Te bonds. 4 is mostly covalent. The oxide is much more ionic than the chalcogenide. The ionicity and covalency in the oxide and chalcogenide provide different features in compositional variations. , Si35 O65 , but preparation of As35 S65 glass is straightforward. In the chalcogenide, composition tuning is attained in atomic ratios. On the other hand, in the oxide glass, the compositional variation can be obtained in chemical units, as 74SiO2 ·16NaO2 ·10CaO.

Nevertheless, atomic images obtained for Se films (Peled et al. 1995) and cleaved surfaces of oxide glasses (Poggemann et al. 2003) seem genuine. Specifically, Poggemann et al. (2003) take a histogram of obtained atomic images for a few glasses, as exemplified for g-SiO2 in Fig. 12, which appears Fig. 11 An EXAFS spectrum for Ge in c-GeS2 (left) and RDFs for Ge in c- and g-GeS2 (right). The inset in the right-hand side shows the distances corresponding to the three peaks (Armand et al. 1992, © Elsevier, reprinted with permission) 38 2 Structure Fig.

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