TITLE

Appropriate choice of channel ratio in thin-film transistors for the exact determination of field-effect mobility

AUTHOR(S)
Okamura, Koshi; Nikolova, Donna; Mechau, Norman; Hahn, Horst
PUB. DATE
May 2009
SOURCE
Applied Physics Letters;5/4/2009, Vol. 94 Issue 18, p183503
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Field-effect mobilities are the most important figures of merit to evaluate the feasibility of semiconductors for thin-film transistors (TFTs). They are, however, sometimes extracted from TFTs with the active semiconductor area undefined and in small channel ratios without the effect of the fringing electric field at the ends of source/drain electrodes taken into account. In this letter, it is demonstrated that the field-effect mobilities extracted from undefined nanoparticulate zinc oxide (ZnO) TFTs at the channel ratio of 2.5 are overestimated by 418%, and the choice of large channel ratios gives the real value of field-effect mobilities.
ACCESSION #
39354741

 

Related Articles

  • Molecular doping effect in bottom-gate, bottom-contact pentacene thin-film transistors. Wakatsuki, Yusuke; Noda, Kei; Wada, Yasuo; Toyabe, Toru; Matsushige, Kazumi // Journal of Applied Physics;Sep2011, Vol. 110 Issue 5, p054505 

    A bottom-gate, bottom-contact (BGBC) organic thin-film transistor (OTFT) with carrier-doped regions over source-drain electrodes was investigated. Device simulation with our originally developed device simulator demonstrates that heavily doped layers (p+ layers) on top of the source-drain...

  • Enhanced photovoltaic properties in graphene/polycrystalline BiFeO3/Pt heterojunction structure. Zang, Yongyuan; Xie, Dan; Wu, Xiao; Chen, Yu; Lin, Yuxuan; Li, Mohan; Tian, He; Li, Xiao; Li, Zhen; Zhu, Hongwei; Ren, Tianling; Plant, David // Applied Physics Letters;9/26/2011, Vol. 99 Issue 13, p132904 

    We report the enhanced photovoltaic properties in polycrystalline BiFeO3 (BFO) thin films with graphene as top electrodes. The short circuit current density (Jsc) and open circuit voltage of the heterojunction are measured to be 25 μA/cm2 and 0.44 V, respectively, much higher than the...

  • Direct patterning of conductive water-soluble polyaniline for thin-film organic electronics. Kwang Seok Lee; Blanchet, Graciela B.; Feng Gao; Loo, Yueh-Lin // Applied Physics Letters;2/14/2005, Vol. 86 Issue 7, p074102 

    We report a simple and low-cost technique for directly patterning conductive water-soluble polyaniline. This technique exploits the hydrophilic nature of polyaniline that was synthesized on a polymer acid template. To create conductive features, aqueous polyaniline solutions are directly spun...

  • A study on the carrier injection mechanism of the bottom-contact pentacene thin film transistor. Keum-Dong Jung; Yoo Chul Kim; Hyungcheol Shin; Byung-Gook Park; Jong Duk Lee; Eou Sik Cho; Sang Jik Kwon // Applied Physics Letters;3/8/2010, Vol. 96 Issue 10, p103305 

    For an analysis of the mechanism of carrier injection in the structure of bottom contact organic thin-film transistor (OTFT), Al blocking layer was applied to the source/drain electrode in variety of ways in the fabrication of bottom contact OTFT. From the comparison of the transfer...

  • Trap-controlled space-charge-limited current mechanism in resistance switching at Al/Pr0.7Ca0.3MnO3 interface. Harada, T.; Ohkubo, I.; Tsubouchi, K.; Kumigashira, H.; Ohnishi, T.; Lippmaa, M.; Matsumoto, Y.; Koinuma, H.; Oshima, M. // Applied Physics Letters;6/2/2008, Vol. 92 Issue 22, p222113 

    Well-defined metal-insulator-metal trilayered structures composed of epitaxial Pr0.7Ca0.3MnO3 insulator layers, epitaxial LaNiO3 bottom electrodes, and Al metal top electrodes were fabricated on LaAlO3 (100) substrates. The I-V characteristics of the trilayer structures show...

  • Transport and crystallization of colloidal particles in a thin nematic cell. Škarabot, M.; Tkalec, U.; Muševič, I. // European Physical Journal E -- Soft Matter;Sep2007, Vol. 24 Issue 1, p99 

    In a thin planar nematic cell, the application of an AC electric field induces a macroscopic transport of micrometer-sized colloidal particles along the nematic director. We have analyzed the dependence of particle velocities on the electric-field amplitude and frequency and found that it...

  • Large photo-induced voltage in a ferroelectric thin film with in-plane polarization. Kui Yao; Bee Keen Gan; Meima Chen; Shannigrahi, Santiranjan // Applied Physics Letters;11/21/2005, Vol. 87 Issue 21, p212906 

    A large photoinduced voltage of 7 V was obtained with an in-plane poled ferroelectric thin film having a composition of WO3 modified Pb0.97La0.03(Zr0.52Ti0.48)O3 (PLWZT), under ultraviolet (UV) illumination for about 80 s. By poling the ferroelectric film along the surface plane through pairs of...

  • Bottom-contact fullerene C60 thin-film transistors with high field-effect mobilities. Kitamura, Masatoshi; Aomori, Shigeru; Jong Ho Na; Arakawa, Yasuhiko // Applied Physics Letters;7/21/2008, Vol. 93 Issue 3, p033313 

    Fullerene C60 thin-film transistors (TFTs) with bottom-contact structure have been fabricated. The parasitic resistance was extracted using gated-transmission line method. The drain/source electrodes consisted of a single Au layer with no adhesion layer; the channel lengths ranged from 5 to 40...

  • DIELECTRIC AND AC CONDUCTION STUDIES OF LEAD PHTHALOCYANINE THIN FILM. Kalugasalam, P.; Ganesan, S. // Chalcogenide Letters;Sep2009, Vol. 6 Issue 9, p469 

    The thin film of Lead Phthalocyanine (PbPc) on glass was prepared by Vacuum deposition method. Deposition of PbPc on pre-cleaned glass substrates under the pressure of 10-6 Torr was achieved by slowly varying the current. The rate of evaporation was properly controlled and maintained constant...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics