TITLE

Bias and temperature dependent charge transport in high mobility cobalt-phthalocyanine thin films

AUTHOR(S)
Samanta, S.; Aswal, D. K.; Singh, A.; Debnath, A. K.; Kumar, M. Senthil; Hayakawa, Y.; Gupta, S. K.; Yakhmi, J. V.
PUB. DATE
January 2010
SOURCE
Applied Physics Letters;1/4/2010, Vol. 96 Issue 1, p013305
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The temperature dependent current-voltage (J-V) characteristics of highly-oriented cobalt phthalocyanine films (rocking-curve width=0.11°) deposited on (001) LaAlO3 substrates are investigated. In the temperature range 300–100 K, charge transport is governed by bulk-limited processes with a bias dependent crossover from Ohmic (J∼V) to trap-free space-charge-limited conduction (J∼V2). The mobility (μ) at 300 K has a value of ∼7 cm2 V-1 s-1 and obeys Arrhenius-type (ln μ∼1/T) behavior. However, at temperatures <100 K, the charge transport is electrode-limited, which undergoes a bias dependent transition from Schottky (ln J∼V1/2) to multistep-tunneling (conductivity varying exponentially on the inverse of the square-root of electric field).
ACCESSION #
47416434

 

Related Articles

  • Synthesis and characterisation of new metallophthalocyanines containing four 12-membered diazadithia-macrocyclic moieties. Kaya, Elif Çelenk; Kantekin, Halit; Kaya, Afşin Ahmet; Dakoğlu, Asuman; Öksüz, Sümeyra; Şişik, Hanife // Journal of Chemical Research;Nov2012, Vol. 36 Issue 11, p657 

    Tetrasubstituted zinc, cobalt, nickel, copper and lead phthalocyanines bearing four 12-membered diazadithia macrocyclic moieties on peripheral positions have been synthesised by cyclotetramerisation reaction of...

  • Nanometric deformations of thin Nb layers under a strong electric field using soft x-ray laser interferometry. Jamelot, G.; Ros, D.; Carillon, A.; Rus, B.; Mocek, T.; Kozlová, M.; Präg, A. R.; Joyeux, D.; Phalippou, D.; Boussoukaya, M.; Kalmykow, M.; Ballester, F.; Jacques, E. // Journal of Applied Physics;8/15/2005, Vol. 98 Issue 4, p044308 

    We present measurements of in situ nanometric-resolution topographical modifications of thin niobium layers subjected to strong electric fields. The Nb layers, deposited on a fused silica substrate, are interferometrically flash probed using soft x-ray laser (XRL) at the wavelength of 21.2 nm....

  • Influence of Thermal Annealing on The Structural Properties of Vanadyl Phthalocyanine Thin Films: A Comparative Study. Aziz, Fakhra; Sulaiman, K.; Muhammad, M. R.; Sayyad, M. Hassan; Karimov, Kh. // World Academy of Science, Engineering & Technology;Aug2011, Issue 56, p852 

    This paper presents a comparative study on Vanadyl Phthalocyanine (VOPc) thin films deposited by thermal evaporation and spin coating techniques. The samples were prepared on cleaned glass substrates and annealed at various temperatures ranging form 95°C to 155°C. To obtain the...

  • Optical and Structural Characterizations of Tin Phthalocvanine Thin Films. Cherian, Regimol C.; Menon, C. S. // AIP Conference Proceedings;4/23/2008, Vol. 1004 Issue 1, p213 

    Phthalocyanines are today regarded as optical materials, which applies to organic dye lasers. The analysis of the optical properties of these thin films enforces the application in the field of thin film optics. Tin phthalocyanine (SnPc) thin films used for the characterization studies are...

  • Determination of the anisotropic optical properties for perfluorinated vanadyl phthalocyanine thin films. Gordan, O. D.; Friedrich, M.; Michaelis, W.; Kröger, R.; Kampen, T.; Schlettwein, D.; Zahn, D. R. T. // Journal of Materials Research;Jul2004, Vol. 19 Issue 7, p2008 

    Thin films of perfluorinated vanadyl phthalocyanine F16PcVO were prepared by physical vapor deposition in high vacuum on KBr and fused silica substrates. The absorption spectra in the visible region show that the films on different substrates have different structure. The optical constants for...

  • Prediction, synthesis and investigation of mesomorphism of new octa(benzo-15-crown-5)-substituted derivatives of phthalocyanine and its metallo complexes [Zn(II), Ni(II)]. Akopova, O. B.; Logacheva, N. M.; Baulin, V. E.; Tsivadze, A. Yu. // Russian Journal of General Chemistry;Nov2008, Vol. 78 Issue 11, p2118 

    First calculation of molecular parameters (MP) of new octa-(benzo-15-crown-5)-substituted phthalocyanine derivatives and of its metallo complexes Zn(II), Ni(II) ( Ib, Ic) is carried out. A prediction was made of the possible formation therefrom of metaphases, and for that purpose the synthesis...

  • Material and process optimization of correlated electron random access memories. Celinska, Jolanta; McWilliams, Christopher; de Araujo, Carlos Paz; Kan-Hao Xue // Journal of Applied Physics;May2011, Vol. 109 Issue 9, p091603 

    A method of making transition metal oxide materials that result in resistive switching properties stable over time and temperature is described. We have developed an ultra low temperature (≤450°C) process for carbonyl ligand modified NiO thin films based on the chemical solution...

  • Low temperature plasma-enhanced atomic layer deposition of thin vanadium nitride layers for copper diffusion barriers. Rampelberg, Geert; Devloo-Casier, Kilian; Deduytsche, Davy; Schaekers, Marc; Blasco, Nicolas; Detavernier, Christophe // Applied Physics Letters;3/18/2013, Vol. 102 Issue 11, p111910 

    Thin vanadium nitride (VN) layers were grown by atomic layer deposition using tetrakis(ethylmethylamino)vanadium and NH3 plasma at deposition temperatures between 70 °C and 150 °C on silicon substrates and polymer foil. X-ray photoelectron spectroscopy revealed a composition close to...

  • Effect of free-carrier concentration on the phase transition and vibrational properties of VO2. Nazari, M.; Chen, Changhong; Bernussi, A. A.; Fan, Z. Y.; Holtz, M. // Applied Physics Letters;8/15/2011, Vol. 99 Issue 7, p071902 

    The effects of native defect doping concentration on the phase transition properties of vanadium dioxide thin films are investigated. The onset temperature of the metal-insulator transition is found to depend on the free-carrier concentration and to correlate with an abrupt change in the...

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