Abstract
We have studied the electrochemical, electrical, and optical properties of aluminum-intercalated indium and gallium monoselenides. Electron probe X-ray microanalysis data demonstrate that aluminum ions are incorporated into the host together with their solvation shell. Such Al3+ incorporation leads to changes in the electrical properties of InSe layered crystals when the intercalate concentration reaches the level NAl ∼ 1020 to 1021 cm−3, which corresponds to the formation of the final reaction product [Alx+ (R-PC)y]InSe− (where PC stands for propylene carbonate). At 77 K, the energy position of the exciton peak in the AlxInSe and AlxGaSe intercalation compounds is a nonmonotonic function of aluminum concentration.
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