| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Charge Transport and Electrical Properties in Poly(3-hexylthiophene) Polymer Layers |
| WANG Li-Guo**, ZHANG Huai-Wu, TANG Xiao-Li, LI Yuan-Xun, ZHONG Zhi-Yong |
State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054
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| Cite this article: |
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WANG Li-Guo, ZHANG Huai-Wu, TANG Xiao-Li et al 2012 Chin. Phys. Lett. 29 017201 |
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Abstract A systematic study of the charge transport and electrical properties in poly(3-hexylthiophene) (P3HT) polymer layers is performed. We demonstrate that the temperature-dependent current-voltage J(V,T) characteristics of hole−only devices based on P3HT can be accurately described using the recently introduced extended Gaussian disorder model (EGDM). A particular numerical method adopting the uneven discretization and Newton iteration method is used to solve the coupled equations describing the space-charge limited (SCL) current in conjugated polymers. For the polymer studied, we find the width of the density of states σ=0.1 eV and the lattice constant a=1.15 nm. Based on the numerical method and EGDM, we further calculate and analyze some important electrical properties for P3HT in detail, including the variation of current-voltage characteristics with the boundary carrier density and the distribution of charge-carrier density and electric field with the distance from interface.
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| Keywords:
72.20.Ee
72.80.Le
73.61.Ph
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Received: 14 June 2011
Published: 07 February 2012
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| PACS: |
72.20.Ee
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(Mobility edges; hopping transport)
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72.80.Le
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(Polymers; organic compounds (including organic semiconductors))
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73.61.Ph
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(Polymers; organic compounds)
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