Cd chalcogenides

The compounds AlYX are best prepared by direct reaction between the respective aluminum halide and chalcogenide in a sealed ampoule at 350°C. The reaction is complete after 2 weeks. In the case of the iodides, a mixture of A1 and I2 (molar ratio 3 10) is used instead of AII3. Other preparative methods, such as the reaction of an aluminum halide with Zn or Cd chalcogenide, or with the chalcogen itself, are applicable to the bromide and chloride only, and give poor yields (15-20%) (158, 159, 266, 327, 328). 

Abramovich M, Brash MJP, Decker F, Moro JR, Motisuke P, MiiUer-St N, Salvador P (1985) Crystal structure, luminescence, and photoelectrochemistry of thin electroplated Cd-chalcogenide layers. J Solid State Chem 59 1-8... 

Licht S, Tenne R, Flaisher H, Manassen J (1984) A pronounced cation effect on performance and stability of Cd- chalcogenide/polysulfide photoelectrochemical cells. J Electrochem Soc 131 950-951... 

Licht S, Manassen J (1985) The effect of hydroxide ion on Cd-chalcogenide/aqueous polysulfide photoelectrochemical cells. J Electrochem Soc 132 1076-1081... 

In terms deriving from the Ramsey approach, a review of chemical shifts in chalcogenide and pnictide semiconductors in terms of Harrison s BOM and related approaches has been given [130]. The Ramsey approach has also been used to explain chemical shifts in III-V compounds [131], and specifically 113Cd shifts in Cd chalcogenides [132]. 

There has been a clear emphasis, in the CD literature, on II-VI semiconductors, mostly CdS, some CdSe, and recently on ZnS. This being the case, the reader may reasonably expect this chapter to be a voluminous one. On the other hand, many of these studies have focused on deposition mechanisms and kinetics (which are dealt with in the previous chapter), with photovoltaic cells, and, to a lesser extent, with quantum size effects, both of which will be dealt with in subsequent chapters. Two detailed descriptions of the experimental procedure (for CdS and CdSe) are given in Chapter 2. This leaves the obvious question What s left The present chapter will answer that question. This includes properties of the films not explicitly discussed in other sections, such as crystal structure, optical and electrical properties, as well as variants of the deposition process. Also, more detail will be given on non-Cd chalcogenides. In short, there is indeed much left. 

Cd-chalcogenides (CdS, CdSe, CdTe) are among the most studied materials as photoelectrodes in a photoelectrochemical cell (PEC) (1,2 /3,4). Interest in such PEC s stems from the fact that, in aqueous polysulfide or polyselenide solutions, a drastic decrease in photocorrosion is observed, as compared to other aqueous solutions, while reasonable conversion efficiencies can be attained. 

Figure 9. Scanning electron microscope pictures of painted Cd chalcogenide films (A) Cd(Se0.

It should be repeated that the best layers for Cd chalcogenides (measured as... 

R. Tenne, N. Muller, Y. Mirovsky, and D. Lando, The relation between performance and stability of Cd-chalcogenide/polysulfide photoelectrochemical cells I. Model and the effect of photoetching, J. Electrochem. Soc. 130 (1983) 852-860. 

Mitzithra C, Kaniaris V, Hamilakis S, Kordatos K, Kollia C, Loizos Z (2011) Development and study of new hybrid semiconducting systems involving Cd chalcogenide thin films coated by a fullerene derivative. Mater Lett 65 1651... 

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