Experimental and modeling study of charge carriers release from traps by interaction with molecular vibrations in silicon organic polymers

• Published in: Molecular Crystals and Liquid Crystals 2020-01, Vol.697 (1), p.68-84
• Main Authors: Sugakov, Volodymyr, Ostapenko, Nina, Ostapenko, Yurij, Kerita, Olga, Strelchuk, Viktor, Kolomys, Olexander
• Format: Article
• Language: English
• Subjects: Current carriers; Molecular vibration; ordering; Polymers; Raman spectra; Silicon; Thermoluminescence; Vibration
• ISSN: 1542-1406; 1563-5287; 1527-1943
• DOI: 10.1080/15421406.2020.1731079

The dependence of the charge carrier's release from traps on the polymer ordering and the widths of the vibration bands are investigated in five silicon organic polymers using thermoluminescence in the 5-200 K temperature range and the Raman spectra. The influence of the vibrations on the thermoluminescence is caused by the processes of the charge carriers' release from traps via the absorption of vibration quanta. The effect manifests itself in both the appearance of discrete levels of the carriers' activation energy which coincides with the energy of the vibration quanta and the formation of a structure on the thermoluminescence curve. It is shown, that the magnitude of effects depends on the widths of optical vibration bands and the ordering of the polymers. The mechanisms of interactions of trapped charges with molecular vibrations are analyzed and the values of microscopical parameters of such interactions are determined. It is shown that the contribution of molecular vibrations in the charge release from the trap is great.