Title :
Energy levels of charge traps in polyethylene terephthalate films
Author :
Gonzalez, F.C. ; Mellinger, A. ; Gerhard-Multhaupt, R.
Author_Institution :
Dept. of Phys., Postdam Univ., Potsdam, Germany
Abstract :
Photo-stimulated discharge (PSD) spectroscopy of polyethylene terephthalate (PETP) films charged through contacting electrodes was performed in order to investigate the mechanism(s) of charge storage and to determine trap depths. The samples were irradiated in vacuum with monochromatic light (photon energies of 3 - 6.2 eV) at constant temperature. The laser-intensity modulation method (LIMM) was used to determine the polarization and the space-charge distribution in the sample. Experimental results indicate the presence of one energy level at 4.1 eV and possibly a second energy level at 5.2 eV (300 and 240 nm, respectively).
Keywords :
dielectric polarisation; electrodes; electron traps; energy states; polymer films; space charge; charge storage; charge traps; electrodes; laser-intensity modulation method; monochromatic light; photo-stimulated discharge (PSD) spectroscopy; photon energies; polyethylene terephthalate films; space-charge distribution; trap depths; Current measurement; Electrodes; Electron traps; Energy states; Intensity modulation; Physics; Plastic films; Polyethylene; Polymer films; Temperature;
Conference_Titel :
Solid Dielectrics, 2004. ICSD 2004. Proceedings of the 2004 IEEE International Conference on
Print_ISBN :
0-7803-8348-6
DOI :
10.1109/ICSD.2004.1350314
