Grain Boundary Effect on Charge Transport in Pentacene Thin Films
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概要
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We report on charge transport properties of polycrystalline pentacene films with variable average grain size in the range from 0.1 to 0.3 μm controlled by the preparation technology. We illustrate with the organic field-effect transistors decrease of the effective mobility and presence of traps with decrease of the grain size. Analysis of the charge transfer excitons reveals decrease of the mobile charge density and the steady-state voltammetry showed significant increase of oxygen- and hydrogen-related defects. We also briefly discuss accumulation of the defects on the grain boundary and show relation between the defect density and grain boundary length.
- 2011-04-25
著者
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Majkova Eva
Institute Of Physics Slovak Academy Of Sciences
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Manaka Takaaki
Department Of Physical Electronics Graduate School Of Science And Engineering Tokyo Institute Of Tec
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Iwamoto Mitsumasa
Department Of Electrical And Electronic Engineering
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Taguchi Dai
Department Of Physical Electronics Tokyo Institute Of Technology
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Nadazdy Vojtech
Institute Of Physics Slovak Academy Of Sciences
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Gmucova Katarina
Institute Of Physics Slovak Academy Of Sciences
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WEIS Martin
Institute of Electronics and Photonics, Slovak University of Technology
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Nádaždy Vojtech
Institute of Physics, Slovak Academy of Sciences, Dubravská cesta 9, 845 11 Bratislava 45, Slovakia
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Haško Daniel
International Laser Centre, Ilkovičova 3, 812 19 Bratislava, Slovakia
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Haško Daniel
International Laser Centre, Ilkovičova 3, 812 19 Bratislava, Slovakia
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