Some Organic-Inorganic Hybrid Semiconductors Obtained from Melts

Abstract

During the last ten years, a number of three- and low-dimensional organic-inorganic hybrid semiconductors based on metal halide units have been prepared and (for some reviews see [1–3]). It has been found that these compounds could be used as elements in nonlinear optical devices [4], light emitting diodes [5], optical microcavities [6] and as channels in thin-film field effect transistors [7]. Mainly, the structural, optical and related properties of compounds, crystallized or deposited on substrates from their solutions in several solvents, have been reported [1–3, 8–14]. There is only little information on properties of hybrid compounds obtained from melts [12]. Very recently, a number of compounds have been prepared from melts and characterized crystallographically [15]. The compounds [CH₃C₆H₄CH₂NH₃]₂SnI₄, [CH₃C₆H₄CH₂NH₃]₂PbI₄, [CH₃C₆H₄CH₂NH₃]₂PbBr₄, [CH₃C₆H₄CH₂NH₃]₂PbCl₄, [C₆H₅(CH₂)₂NH₃]₂PbI₄, [C₆H₅(CH₂)₄NH₃]₂PbI₄, [C₄H₉NH₃]₂PbBr₄, have been prepared from melts into glass tubes and found to be two-dimensional (2D) compounds, i.e., isostructural to those obtained from solutions.