Fizika Nizkikh Temperatur: Volume 47, Number 5 (May 2021), p. 462-467    ( to contents , go back )

Exciton absorption spectra of thin films of RbCu2Cl3 and Rb2Cu3Cl5 ternary compounds

E. N. Kovalenko

Kharkiv National University of Radio Electronics, Kharkiv 61166, Ukraine

O. N. Yunakova and N. N. Yunakov

Kharkiv National University, Kharkiv 61022, Ukraine

pos Анотація:660

Received February 15, 2021, published online March 26, 2021


The absorption spectra of RbCu2Cl3 and Rb2Cu3Cl5 thin films w ere studied in the 2–6 eV spectral and 90–450 K temperature ranges. The localization of excitons in CuCl43- structural elements of crystal lattice of compounds,three-dimensional nature of excitons in RbCu2Cl3 and two-dimensional nature of excitons in Rb2Cu3Cl5 were established. The exciton spectra of RbCu2Cl3 and Rb2Cu3Cl5 thin films were interpreted based on the transitions in the Cu+ ion.

Key words:  thin films, absorption spectra, excitons.

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