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Modulation of optical absorption in poly(diphenylenephthalide) films near the switching threshold |
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| Authors: | A N Lachinov é R Zhdanov R G Rakhmeev R B Salikhov and V A Antipin |
| Institution: | (1) Department of Physics, Research Centre of Ultrafast Science, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus;(2) Department of Mechanical and Manufacturing Engineering, Materials Science Group, Nanostructured Materials and Devices Laboratory, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus |
| Abstract: | Optical properties of poly(diphenylenephthalide) nonconjugated polymer films near the electronic switching threshold have been studied by modulation spectroscopy. The measured spectra exhibit specific features in the range of the band gap at ∼2.4 eV. The results obtained have been interpreted using quantum-chemical calculations of the electron energy characteristics of the polymer molecule. It has been established that the injection of charge carriers into the polymer film and interaction of this excess charge with the macromolecule can lead to the formation of deep trap states near the center of the band gap. |
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