Gaussian approximation of the spectral dependence of the absorption spectrum in polymer semiconductors
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- 作者：V. V. Malov ; A. R. Tameev ; S. V. Novikov ; M. V. Khenkin ; A. G. Kazanskii…
- 刊名：Semiconductors
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：50
- 期：4
- 页码：482-486
- 全文大小：430 KB
- 刊物类别：Physics and Astronomy
- 刊物主题：Physics
Magnetism and Magnetic Materials
Electromagnetism, Optics and Lasers
Russian Library of Science - 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
- ISSN：1090-6479
- 卷排序：50
文摘
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.Original Russian Text © V.V. Malov, A.R. Tameev, S.V. Novikov, M.V. Khenkin, A.G. Kazanskii, A.V. Vannikov, 2016, published in Fizika i Tekhnika Poluprovodnikov, 2016, Vol. 50, No. 4, pp. 489–493.