Abstract
The optical and electro-optical properties of organic copper phthalocyanine semiconductor (α- CuPc) have been investigated by Stark (electroabsorption) spectroscopy using a metal electrode grating with a submicron (0.88 μm) interelectrode distance. Differences between dipole moments (Δμ) and polarizabilities (Δα) in the excited and ground states of α-CuPc are measured for a nanoscale semiconductor film. It is concluded that the extremely high values of Δμ and Δα are in principle not parameters of individual α-CuPc molecules: they are determined by exciton effects specifically in the polycrystalline medium with a characteristic morphology of hyperfine films, which depends on the structure of the samples and their fabrication technology.
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Original Russian Text © L.M. Blinov, V.V. Lazarev, S.G. Yudin, S.P. Palto, 2016, published in Optika i Spektroskopiya, 2016, Vol. 120, No. 2, pp. 313–318.
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Blinov, L.M., Lazarev, V.V., Yudin, S.G. et al. Stark spectroscopy of CuPc organic semiconductor with a submicron metal-electrode grating. Opt. Spectrosc. 120, 300–305 (2016). https://doi.org/10.1134/S0030400X1602003X
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DOI: https://doi.org/10.1134/S0030400X1602003X