Semiconductor/semiconductivity solubility

Sometimes, semiconductivity depends on the type of a structural phase that arises from synthesis. Thus, in the case of (TCNQ) Cu the semiconducting phase is thermodynamically disfavored. To prepare this semiconductor, Harris et al. (2005) proposed to perform the reduction of TCNQ in acetonitrile at glass-carbon, gold, or platinum electrode in the presence of Cu. This allows the electrocrystallization of sparingly soluble TCNQCu semiconducting phase to occur by a nucleation... 

Galhum reacts strongly with boihng water, is shghtly soluble in alkali solutions, acids, and mercury, and is used as an amalgam. It has some semiconductor properties but only if doped with elements in group 14, such as As, P, and Sb. It is also used as a dope for other semiconducting elements. 

Group IB metals have low solubilities in semiconducting materials. These elements must be absent from semiconductors in which pn junctions with low leakage are formed, but diffusion from deposited films of Cu, Ag, and Au occurs in Ge, Si, CdS, InSb, GaAs, AlSb, CdTe, ZnSe, PbSe, and InAs. ... 

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