Effect of molecular optical vibrations on thermoluminescence of silicon organic polymer

Interaction of Optical Vibrations With Charge Traps and the Thermoluminescence Spectra of Polymers

“…We have studied the spectrum of hole traps of the silicon organic polymer poly (di-n-hexylsilane) by the low-temperature fractional TSL method in the temperature interval 5-40 K and the Raman spectra of the polymer at 300 K. The coincidence of the trap activation energy with the energies of Si-Si vibrations of the polymer chain, obtained from Raman spectrum, allows us to conclude that the releases of charges in the proposed mechanism occur only from those traps, the depth of which corresponds to Si-Si vibrations of the polymer chain. In this region of temperatures, the structure on the TSL curve is observed, which was predicted in the model [20].…”

“…In addition, we detected an additional structure on the TSL curve (Fig. 2), which was predicted by the model developed in [20]. The model suggested in [19] cannot explain the coincidence of the activation energy with the energy of vibrations.…”

“…The model suggested in [19] cannot explain the coincidence of the activation energy with the energy of vibrations. Therefore, we use the model suggested in [20], which explains this coincidence and predicts the appearance of the structure.…”

“…where is a constant, ( ) is the total number of trapped charges, and = is the heating rate. The examples of TSL curves for several types of vibrations are presented in [20].…”

“…The connection between the activation energies of the traps of charge carriers and the energies of optical vibrations of the polymer backbone observed in the Raman spectra [16,17] has been recently obtained in [18,19], by using the TSL spectra of PDHS films. A model was proposed in [20] for the explanation of these results. It was assumed that the processes of release of holes from traps are activated via the resonant energy transfer from Si-Si vibrations of the polymer chain that are excited, as the temperature increases, to charge carriers.…”