Absorption spectra of layered ZnI₂ and K₂ZnI₄ compounds intercalated with CO₂

• Main Authors: Yunakova, O.N., Miloslavsky, V.K., Kovalenko, E.N., Makovetsky, E.D.
• Format: Article
• Language: English
• Published: НТК «Інститут монокристалів» НАН України 2009
• Series: Functional Materials
• Subjects: Characterization and properties
• Online Access: http://dspace.nbuv.gov.ua/handle/123456789/137720

The absorption spectra of thin films of ZnI₂ and K₂ZnI₄ layered compounds intercalated with CO₂ molecules have been investigated in temperature interval from 90 to 240 K. It is found that the intercalation results in high-frequency shift of exciton bands and their broadening. Considering the structure of ZnI₂ and K₂ZnI₄ crystal lattices, the most probable positions of CO₂ molecules in spacings between layers of compounds have been established. It is shown that, in K₂ZnI₄ compound, unlike ZnI₂, there are two position types of intercalant molecules with molecular axes of different orientation relative to the compound crystallographic axes.