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Doping of phthalocyanine films: structural reorganization versus acceptor effect

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Abstract

It has been demonstrated that doping of phthalocyanine (Pc) films by co-sublimation with organic acceptor p-chloranil (CA) initiates alterations in their crystalline structure, depending on the type of Pc molecule. In itself this factor may inhibit or promote the effect of dopant on the specific conductivity of the particular Pc associated with formation of the charge transfer complex between Pc and CA.

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Notes

  1. Finely polished crystalline ceramic material, Russian analog of Zerodur®, with ultra low thermal expansion and conductance, used here as dielectric substrates for electrical measurements, after lithography.

  2. The findings described herein are valid for the concentration range from 10:1 to 5:1 (Pc:CA molecular ratio). The dopant distributes not homogeneously, but most likely concentrates at the grain boundaries (see, supplementary info). This is the reason why we did not observe more characteristic changes in UV/Vis spectra or distortions of Pc lattice in XRD spectra. Further increase in the CA content leads to segregation of phases in sublimed films and degradation of their properties. Detailed results on various dopant-to-matrix ratios and photovoltaic effects will be published elsewhere.

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Acknowledgements

Authors thank Dr. S.Zavyalov (NIFHI) for preparation of Pc/PPX samples and Dr. Yu.N. Drozdov (IPM RAS) for XRD measurements. This work was partly supported by RFBR (03-02-17407) and PRAN.

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Authors and Affiliations

  1. Institute for Physics of Microstructures of the Russian Academy of Sciences, GSP-105, Nizhny Novgorod, 603950, Russian Federation

    Georgy L. Pakhomov & Dmitry A. Kosterin

  2. Institute of Electro-Optical Science and Engineering, National Cheng Kung University, Tainan, Taiwan, 701, Republic of China

    Georgy L. Pakhomov & Tzung-Fang Guo

  3. Lobachevsky State University, Nizhny Novgorod, 603950, Russian Federation

    Lev G. Pakhomov

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  1. Georgy L. Pakhomov
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  2. Dmitry A. Kosterin
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Correspondence to Georgy L. Pakhomov.

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Pakhomov, G.L., Kosterin, D.A., Pakhomov, L.G. et al. Doping of phthalocyanine films: structural reorganization versus acceptor effect. J Mater Sci: Mater Electron 19, 500–504 (2008). https://doi.org/10.1007/s10854-007-9370-x

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