TITLE

Electron spin resonance observation of field-induced charge carriers in ultrathin-film transistors of regioregular poly(3-hexylthiophene) with controlled in-plane chain orientation

AUTHOR(S)
Watanabe, Shun-ichiro; Tanaka, Hisaaki; Kuroda, Shin-ichi; Toda, Akio; Nagano, Shusaku; Seki, Takahiro; Kimoto, Atsushi; Abe, Jiro
PUB. DATE
April 2010
SOURCE
Applied Physics Letters;4/26/2010, Vol. 96 Issue 17, p173302
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Ultrathin-film polymeric transistors with controlled in-plane chain orientation have been fabricated based on Langmuir–Blodgett technique by cospreading liquid crystal molecule with regioregular poly(3-hexylthiophene). The mobilities parallel to the chain direction reached 0.001–0.01 cm2/V s for 1 to 5 monolayer thick transistors. Mobility ratio was about 2 for the parallel and perpendicular directions. Electron spin resonance (ESR) signals of the field-induced polarons exhibited clear in-plane anisotropies due to unpaired π-electrons. The anisotropic ESR spectra together with the optical dichroism determine the detailed molecular orientations in the channel of such ultrathin transistors.
ACCESSION #
50173990

 

Related Articles

  • Rocket fuel kicks transistor speeds through the roof. Knight, Will // New Scientist;3/20/2004, Vol. 181 Issue 2439, p25 

    Hydrazine, a toxic liquid sometimes used as a fuel in rocket motors, has turned out to be ideal for helping to make faster thin-film transistors, a crucial component of liquid crystal displays. These transistors are built up from fine layers of semiconductors deposited on a silicon substrate....

  • EPR study of Fe3+ in α-quartz: A reexamination of the so-called I center. Mombourquette, M. J.; Tennant, W. C.; Weil, J. A. // Journal of Chemical Physics;7/1/1986, Vol. 85 Issue 1, p68 

    10 GHz electron paramagnetic resonance studies of Fe3+ in synthetic brown α-quartz single crystals have been carried out at 295 and at 40 K. The spin-Hamiltonian parameters were determined including high-spin Zeeman terms of form BS3 and allowing (g,D) matrix noncoaxiality as well as...

  • ESR study of optically enhanced phase transition in (BEDT–TTF)3Ta2F11. Acrivos, J. V.; Hughes, H. P.; Parkin, S. S. P. // Journal of Chemical Physics;2/15/1987, Vol. 86 Issue 4, p1780 

    We have identified an optically enhanced magnetic phase transition in the newly synthesized organic molecular charge transfer salt, (BEDT–TTF)3Ta2F11 (BEDT–TTF 3/4 bis-ethylenedithiolotetrathiafulvalene) by ESR absorption measurements in the X band microwave region. At room...

  • Fourier transform–electron spin resonance study of spin polarization generated by triplet- and radical-pair mechanisms in a photoinduced electron transfer reaction. Plüschau, M.; Zahl, A.; Dinse, K. P.; van Willigen, H. // Journal of Chemical Physics;3/15/1989, Vol. 90 Issue 6, p3153 

    Fourier transform–electron spin resonance (FT–ESR) was utilized to measure the photoinduced charge transfer in the system Zn tetraphenylporphyrin/duroquinone with a time resolution of 10 ns. The separate observation of the intensity/time profile of different hyperfine lines in the...

  • Fullerenes as functional moieties in conjugated polymers: Towards donor-acceptor double cable polymeric materials. Neugebauer, Helmut; Cravino, Antonio; Zerza, Gerald; Maggini, Michele; Bucella, Stefania; Scorrano, Gianfranco; Svensson, Mattias; Andersson, Mats R.; Sariciftci, N. Serdar // AIP Conference Proceedings;2001, Vol. 591 Issue 1, p511 

    The properties of a novel poly(bithiophene-fulleropyrrolidine), which belongs to the class of so called “double cable” polymers, are studied. The polymer consists of covalently linked electron acceptor moieties to an electron donor polymeric backbone. Photoinduced charge transfer is...

  • Triplet electron paramagnetic resonance detection of porphyrinoids in fluid liquid crystals at elevated temperatures. Regev, Ayelet; Levanon, Haim; Murai, Toshiaki; Sessler, Jonathan L. // Journal of Chemical Physics;4/15/1990, Vol. 92 Issue 8, p4718 

    The photoexcited triplet state of two porphyrinoids, H2TTP and a Cd complex of Texaphyrin (Cd-TxP), oriented in liquid crystals were examined by time-resolved electron paramagnetic resonance (EPR) spectroscopy as a function of temperature. The low probability of molecular tumbling in the liquid...

  • The photoexcited triplet state as a probe of dynamics and phase memory in a multiphase liquid crystal: Time-resolved electron paramagnetic resonance spectroscopy. Regev, Ayelet; Galili, Tamar; Levanon, Haim // Journal of Chemical Physics;12/1/1991, Vol. 95 Issue 11, p7907 

    Differences between mesophases and hysteresis effects can be examined by electron paramagnetic resonance (EPR) detection of light-induced transient triplets oriented in liquid crystals (LC). Time-resolved EPR spectroscopy (direct detection) has been applied to study the photoexcited triplet...

  • Ion-modulated ambipolar electrical conduction in thin-film transistors based on amorphous conjugated polymers. Chen, X. Linda; Bao, Zhenan; Scho¨n, J. Hendrik; Lovinger, Andrew J.; Lin, Yen-Yi; Crone, Brian; Dodabalapur, Ananth; Batlogg, Bertram // Applied Physics Letters;1/8/2001, Vol. 78 Issue 2, p228 

    Through gate-modulated electrochemical doping, ambipolar operation in thin-film transistors (TFTs) can be realized in air with solution processable conjugated polymers. Unlike other typical organic TFTs, which rely on high crystallinity for better charge transport, these electrochemically-doped...

  • Anistropic growth and high performance organic thin film transistor. Sharma, Akanksha; Kumar, Pramod; Ghosh, Subhasis // AIP Conference Proceedings;6/5/2012, Vol. 1447 Issue 1, p30 

    The central feature in the operation of organic electronic devices is the charge carrier transport which depends upon the molecular structure and the arrangements of molecules on the substrate. The charge transport properties can be improved by maximizing the order of the thin films....

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics