Influence of laser radiation and mercury vapors on the structure of se100-xtex amorphous films

• Date: 2022
• Main Authors: Рубіш, В. М., Гасинець, С. М., Дуркот, М. О., Макар, Л. І., Пісак, Р. П., Стефанович, В. О., Ясінко, Т. І., Костюкевич, С. А., Костюкевич, К. В.
• Format: Article
• Language: Ukrainian
• Published: Інститут проблем реєстрації інформації НАН України 2022
• Subjects: chalcogenide amorphous films; Raman spectra; structure; structural transformations; sensor elements
• Online Access: http://drsp.ipri.kiev.ua/article/view/274924
• Journal Title: Data Recording, Storage & Processing

The structure of nominally pure and sustained in mercury vapor Se100–xTex amorphous films (0 ≤ x ≤ 15) was studied by Raman spectroscopy. It is established that the matrix of nominally pure films is constructed mainly by structural groups of Se8 and contains helical chains of Sen of different length in which part of the Se atoms is replaced by Te atoms. The process of substituting Se for Te is accompanied by a shift of the band at 236 cm–1 in the Raman spectrum of the Se amorphous film in the region of 210–214 cm–1 in the spectra of Se100–xTex films. Under certain modes of laser irradiation (λ = 532 nm), the films of the selenium-tellurium system crystallize. At the same time, the most intense bands at 251–253 and 210–214 cm–1 are shifted to the short-wavelength part of the spectrum by 3–9 cm–1. In some cases, the pumpihg of the intensities of these bands is observed. In addition, the spectra of the films show well-defined features at 84–88 cm–1 and 165–170 cm–1. The obtained results allow us to make an assumption that the crystalline inclusions of trigonal and α-monoclinic modification are formed in the Se100–xTex amorphous matrix. Modification of Se100–xTex amorphous films with mercury leads to the formation in their matrix of mercury selenide crystalline inclusions.