Crystallite size effect on the hole mobility of uniaxially aligned copper phthalocyanine thin-film field-effect transistors

Ofuji, Masato; Ishikawa, Ken; Takezoe, Hideo; Inaba, Katsuhiko; Omote, Kazuhiko
February 2005
Applied Physics Letters;2/7/2005, Vol. 86 Issue 6, p062114
Academic Journal
We fabricated copper phthalocyanine (CuPc) thin-film field-effect transistors (FETs) with three different orientations of CuPc with respect to channels. The substrate rubbing treatment induced uniaxial orientation in CuPc layers, yielding higher hole mobility (∼0.02 cm2/V s) than that of untreated FETs. Although the rubbing treatment bore high-aspect-ratio (>10) CuPc domains oriented to rubbing direction, the mobility anisotropy of the film was only 1.4. This discrepancy was explained by analyzing grazing-incidence x-ray diffraction profiles, i.e.: (1) In-plane mean size of crystals was smaller than their appearance in atomic force microscopy, and (2) the crystallites were much shorter in the apparent long-hand direction (11 nm) than the direction perpendicular to it (44 nm).


Related Articles

  • Temperature Dependence of Epitaxial Graphene Formation on SiC(0001). Luxmi; Nie, Shu; Fisher, P. J.; Feenstra, R. M.; Gu, Gong; Sun, Yugang // Journal of Electronic Materials;Jun2009, Vol. 38 Issue 6, p718 

    The formation of epitaxial graphene on SiC(0001) surfaces is studied using atomic force microscopy, Auger electron spectroscopy, electron diffraction, Raman spectroscopy, and electrical measurements. Starting from hydrogen-annealed surfaces, graphene formation by vacuum annealing is observed to...

  • One-step Method of Producing Uniaxially Oriented Layers of Organic Discotic Molecules for Field-Effect Transistors. Miskiewicz, P.; Rybak, A.; Jung, J.; Glowacki, I.; Maniukiewicz, W.; Tracz, A.; Pfleger, J.; Ulanski, J.; Müllen, K. // Nonlinear Optics, Quantum Optics: Concepts in Modern Optics;2007, Vol. 37 Issue 1-3, p207 

    Highly oriented layers of organic semiconductors: hexa-benzocoronene (p-type) and perylene derivative (n-type) were obtained by the zone-casting technique - a one step method of producing highly aligned layers of solution processible organic materials with no need of use of any preoriented...

  • Anisotropic field-effect mobility of pentacene thin-film transistor: Effect of rubbed self-assembled monolayer. Shou-Zheng Weng; Wei-Shan Hu; Chi-Hsien Kuo; Yu-Tai Tao; Liang-Jen Fan; Yaw-Wen Yang // Applied Physics Letters;10/23/2006, Vol. 89 Issue 17, p172103 

    Enhanced and anisotropic field-effect mobility of thin-film transistors based on pentacene was obtained on a substrate covered with a prerubbed, self-assembled monolayer (SAM) of n-alkyltrichlorosilane. The field-effect mobility along the rubbing direction increased by a factor of ∼15 on...

  • Crystallinity improvement of benzodithiophene-dimer films for organic field-effect transistors. Yamaguchi, K.; Takamiya, S.; Minami, M.; Doge, Y.; Nishide, Y.; Osuga, H.; Uno, K.; Tanaka, Ichiro // Applied Physics Letters;7/28/2008, Vol. 93 Issue 4, p043302 

    We have significantly improved the crystallinity of vacuum-evaporated benzodithiophene (BDT)-dimer films using pentacene crystallinity control layers. The pentacene molecules evaporated on hexamethyldisilazane-treated SiO2 surfaces first form many small islands. Then, the islands grow two...

  • Electron beam induced current investigations of Pt/SrTiO3-x interface exposed to chemical and electrical stresses. Jiang, W.; Evans, D.; Bain, J. A.; Skowronski, M.; Salvador, P. A. // Applied Physics Letters;3/1/2010, Vol. 96 Issue 9, p092102 

    Pt Schottky contacts were fabricated on oxygen deficient SrTiO3-x [001] single crystals. Electron beam induced current (EBIC) and atomic force microscopy images taken on etched SrTiO3 (001) surfaces revealed that the dark {001} oriented lines observed in EBIC correlate with arrays of dislocation...

  • Study on copper phthalocyanine and perylene-based ambipolar organic light-emitting field-effect transistors produced using neutral beam deposition method. Dae-Kyu Kim; Jeong-Do Oh; Eun-Sol Shin; Hoon-Seok Seo; Jong-Ho Choi // Journal of Applied Physics;2014, Vol. 115 Issue 16, p164503-1 

    The neutral cluster beam deposition (NCBD) method has been applied to the production and characterization of ambipolar, heterojunction-based organic light-emitting field-effect transistors (OLEFETs) with a top-contact, multi-digitated, long-channel geometry. Organic thin films of n-type...

  • Ultrasensitive, label-free, and real-time immunodetection using silicon field-effect transistors. Kim, Ansoon; Ah, Chil Seong; Yu, Han Young; Yang, Jong-Heon; Baek, In-Bok; Ahn, Chang-Guen; Park, Chan Woo; Jun, Myung Sim; Lee, Sungjae // Applied Physics Letters;9/3/2007, Vol. 91 Issue 10, p103901 

    Ultrasensitive, label-free, and real-time prostate-specific antigen (PSA) sensor was developed using n-type silicon nanowire-based structures configured as field-effect transistors using the conventional “top-down” semiconductor processes. Specific binding of PSA with antibody of PSA...

  • Effect of tip polarity on Kelvin probe force microscopy images of thin insulator CaF2 films on Si(111). Yurtsever, Ayhan; Sugimoto, Yoshiaki; Fukumoto, Masaki; Abe, Masayuki; Morita, Seizo // Applied Physics Letters;8/20/2012, Vol. 101 Issue 8, p083119 

    We investigate thin insulating CaF2 films on a Si (111) surface using a combination of noncontact atomic force microscopy (NC-AFM) and Kelvin probe force microscopy (KPFM). Atomic-scale NC-AFM and KPFM images are obtained in different imaging modes by employing two different tip polarities. The...

  • Magnetic properties and interlayer coupling of epitaxial Co/Cu films on Si. Mansell, R.; Petit, D. C. M. C.; Fernández-Pacheco, A.; Lavrijsen, R.; Lee, J. H.; Cowburn, R. P. // Journal of Applied Physics;2014, Vol. 116 Issue 6, p063906-1 

    Thin films of Co and Co/Cu/Co trilayers with wedged Cu interlayers were grown epitaxially on Cu buffer layers on hydrogen passivated Si(001) wafers. We find that single Co layers have a well-defined four-fold anisotropy but with smaller in-plane anisotropies than observed in Co grown on Cu...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics