Gaussian approximation of the spectral dependence of the absorption spectrum in polymer semiconductors
| Autor: | Andrey G. Kazanskii, Mark V. Khenkin, Anatoly V. Vannikov, V. V. Malov, Alexey R. Tameev, Sergey V. Novikov |
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| Rok vydání: | 2016 |
| Předmět: |
Photocurrent
Materials science Absorption spectroscopy Band gap business.industry 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Molecular physics Atomic and Molecular Physics and Optics Spectral line Electronic Optical and Magnetic Materials Absorption edge Attenuation coefficient 0103 physical sciences Density of states Optoelectronics 010306 general physics 0210 nano-technology business Absorption (electromagnetic radiation) |
| Zdroj: | Semiconductors. 50:482-486 |
| ISSN: | 1090-6479 1063-7826 |
| DOI: | 10.1134/s1063782616040151 |
| Popis: | The optical and photoelectric properties of present-day photosensitive polymers are of particular interest due to their prospects for use in various photoelectric applications. Here the absorption edge is studied by the constant photocurrent method which is widely used for studies of inorganic materials. For the objects to be studied, PCDTBT and PTB7 polymers and their mixtures with the PC71BM fullerene derivative are chosen. The spectral dependences of the absorption coefficient for the pure polymers and mixtures are approximated on the assumption of the Gaussian distribution of the density of states in the bands of the components, which provides a means for estimating the electrical band gaps. In addition, such processing of the spectra makes it possible to confirm some important inferences about the states responsible for optical transitions in the low-energy absorption region. |
| Databáze: | OpenAIRE |
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