Skip to main content Accessibility help

Transport model for disordered organic nanocomposites

  • Andrés Vercik (a1)


Electric transport in disordered media is usually explained in terms of different transport regimes, such as SCLC (Space Charge Limited Current) or TCLC (Trap Charge Limited Current) regimes. These models lead to exponential dependencies of the current on voltage, e.g., quadratic for SCLC or higher order for TCLC, with transition regions between them where fitting is poor. Alternatively, a statistical distribution in space and energy of the disordered traps, e.g., Gaussian or exponential, allows explaining transport in disordered materials. In this work, we propose a modeling based on the density of states (DOS) function, fitted from normalized differential conductivity curves obtained from experimental current-voltage curves. In general a Gaussian function is used for low energies whereas one or more exponential functions are used for higher energies. The proposed model is used to reproduce experimental current-voltage curves of organic nanocomposites, with gold and silver nanoparticles within chitosan matrixes. A unique expression is obtained for a very accurate fitting the experimental current-voltage characteristics in the whole voltage range without transition regions.



Hide All
1. Mensfoort, L. M. v., Billen, J., Carvelli, M., Vulto, S.I.E., R.A.J. Janssen, and Coehoorn, R., “Predictive modeling of the current density and radioactive recombination in blue polymer-based light-emitting diodes”, Journal of Applied. Physics. 109 (2011) 064502.10.1063/1.3553412
2. Bettinger, C. J. and Bao, Z., “Biomaterials-Based Organic Electronic Devices”, Polymer International 59(5) (2010) 563567.
3. Brutting, W., Berleb, S. and Mucol, A. G., “Device physics of organic light-emitting diodes based on molecular materials”, Organic Electronics 2 (2001) 136.10.1016/S1566-1199(01)00009-X
4. Montero, J.M. and Bisquert, J., “Interpretation of trap-limited in space-charge limited current in organic layers with exponential density of traps”, Journal of Applied Physics 110 (2011) 043705.10.1063/1.3622615
5. Campbell, A. J., Bradley, D. D. C. and Lidzey, D. G., “Space-Charge limited conduction with traps in poly (phenylene vinylene) light emitting diodes ”, Journal of Applied Physics 18 (1997) 63266341.10.1063/1.366523
6. Akkilic, K., Uzun, I. and Kilicoglu, T., “The calculation of electronic properties of an Ag/chitosan/n-Si Schottky barrier diode”, Synth. Metals 157(6-7) (2007 297302.10.1016/j.synthmet.2007.03.009
7. Bozanic, D. K., Trandafilovic, L. V., Luyt, A. S. and Djokovic, V., “Green’ synthesis and optical properties of silver-chitosan complexes and nanocomposites”, Reactive and Functional Polymers 70 (2010) 869873.10.1016/j.reactfunctpolym.2010.08.001
8. Marin, L., Popescu, M.-C., Zabulica, A., Uji, H. and Fron, E., “Chitosan as matrix for bio-polymer dispersed liquid crystal Chitosan as matrix for bio-polymer dispersed liquid crystal Chitosan as matrix for bio-polymer dispersed liquid crystal systems”, Carbohydrate Polymers 95 (2013) 1624.10.1016/j.carbpol.2013.02.028
9. Wei, D. and Qian, W., “Facile synthesis of Ag and Au nanoparticles utilizing chitosan as a mediator agent”, Colloids and Sur- faces B: Biointerfaces 62 (2008) 136142.10.1016/j.colsurfb.2007.09.030
10. Yang, Y., Cui, J., Zheng, M., Hu, C., Tan, S., Xiao, Y., Yanga, Q. and Liu, Y., “One-step synthesis of amino-functionalized fluorescent carbon nanoparticles by hydrothermal carbonization of chitosan”, Chemical Communications I, 48 (2012) 380382.10.1039/C1CC15678K


Transport model for disordered organic nanocomposites

  • Andrés Vercik (a1)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed