Transition metal dichalcogenide

Jobic S, Brec R, Rouxel J (1992) Occurrence and characterization of anionic bondings in transition metal dichalcogenides. J AUoy Compd 178 253-283... 

Wilson JA, Yoffe AD (1969) The transition metal dichalcogenides. Discussion and interpretation of the observed optical, electrical and structural properties. Adv Phys 18(73) 193-335... 

Lucovsky G, White RM, Benda JA, ReveUi JE (1973) Infrared-reflectance spectra of layered Group-IV and Group-VI transition-metal dichalcogenides. Phys Rev B 7 3859-3870 Cordes H, Schmid-Fetzer R (1994) Phase equilibria in the U-Te system. J AUoy Compd 216 197-206... 

Tiibutsch H (1978) Hole reactions from d-energy bands of layer type group VI transition metal dichalcogenides New perspectives for electrochemical solar energy conversion. J... 

A critical review on the foundation and earlier results on metal intercalates of the transition metal dichalcogenides and related host materials can be found in the seminal paper of Whittingham [53]. The electrochemical and transport properties... 

Subba Rao GV, Tsang JC (1974) Electrolysis method of intercalation of layered transition metal dichalcogenides. Mater Res BuU 9 921-926... 

Ki, W. Huang, X. Li, J. Young, D. L. Zhang, Y. 2007. Highly conductive group VI transition metal dichalcogenide films by solution-processed deposition. J. Mater. Res. 22 1390-1395. 

Chen X, Fan R (2001) Low temperature hydrothermal synthesis of transition metal dichalcogenides. Chem Mater 13 802-805... 

Omloo and Jellinek7 have described the synthesis and characterization of intercalation compounds of alkali metals with the group V layered transition metal dichalcogenides. Typically, these types of intercalation complexes are sensitive to moisture and must be handled in dry argon or nitrogen atmospheres. The alkali metal atoms occupy either octahedral or trigonal prismatic holes between X-M—X slabs. There are two principal means by which these compounds may be prepared. 

IV layered transition metal dichalcogenide-alkali metal intercalation compounds. The advantage of this method is that it is carried out at room temperature and, consequently, there is less likelihood of reaction between sodium and the reaction vessel. On the other hand, this method is more difficult in that it involves the use of liquid NH3. Furthermore, undesirable side reactions may occur if the NH3 is not dried thoroughly or if the reaction vessel is not clean. For example,... 

DiSalvo et al.9 have carried out a systematic survey of intercalation compounds of 2H(a)-TaS2 with post-transition metals. In particular, the system SnxTaS2 was found to exist in two composition domains, 0 < x < /3 and x = 1. The following discussion briefly describes the techniques used by DiSalvo to synthesize the compound SnTaS2. Syntheses of other transition and post-transition metal intercalation complexes with the layered transition metal dichalcogenides are discussed in References 9 and 20-24. 

J. A. Wilson and A. D. Yoffe, Adv. Phys., 18, No. 73, 193-335 (1969). This article offers a complete discussion of the polymorphic phases found in the various layered transition metal dichalcogenides. 

Figure 1.33. Polytypes of transition-metal dichalcogenides (1120 sections) large circles, chalcogen small circles, metal.

Figure 4.17 Electrical resistivity parallel to the layers of transition-metal dichalcogenides. (After Wilson et al, 1975.)...

In summary, it has been demonstrated that surface morphology is critically important in determining the performance of solar cells with layered compound semiconductors. Steps on structured surfaces of transition metal dichalcogenides have been identified as carrier recombination sites. The region defined by the depth of the space charge layer parallel to the van der Waals planes can be considered as essentially "dead" in the sense that its photoresponse is negligible. As the "step model" predicts, marked improvement in solar cell performance is found on samples with smooth surfaces. 

The major classes of conducting host lattices are summarized in Table 2. Of these, graphite and the layered transition metal dichalcogenides see Chalcogenides Solid-state Chemistry) have been investigated in the greatest detail. The conducting host lattices have the feature that... 

Intercalation compounds of the dichalcogenides can be formed with organic guest molecules under sflictly anhydrous conditions by direct reaction at temperatures up to about 200 °C. Early studies of the transition metal dichalcogenides largely focused on this type of reaction after the initial discovery of amide intercalation in TiS2 and the subsequent... 

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