Full text loading...
(Color online) (a) Room temperature resistivity (ρ 300K) of composite CoPc-FePc films as a function of FePc concentration. (b) The temperature dependence of resistivity for the CoPc, FePc, and composite CoPc-FePc films (c) Plots of reduced activation energy W( = −dln[ρ(T)]/dlnT) for CoPc, FePc, and composite CoPc-FePc films. (d) Linear fit of conductivity versus T 3/2 data for composite CoPc-FePc films. Inset shows the nearly linear dependence of log ρ versus log T plots for CoPc and FePc films.
(Color online) (a) Log-log plots showing current-voltage (J-V) characteristics of composite films in the temperature range 300-50 K. (b) Temperature dependence of mobility for composite films. (c) Log-log plots showing current-voltage (J-V) characteristics of CoPc films in the temperature range 300-100 K. (d) Power law fit of data of (b). The fits meet at cross over voltage V c = 1368 V. Inset shows the temperature dependence of voltage exponent (α).
(Color online) (a) GIXRD data of the CoPc, FePc, and composite films. (b) UV-visible spectrum for the FePc, CoPc, and composite films. (c) MALDI mass spectrum for FePc, CoPc, and composite CoPc-FePc films. Inset shows the enlarged view of spectrum for composite films. (d)-(f) AFM images (size: 5 μm × 5 μm) of the FePc, CoPc, and composite CoPc-FePc films, respectively. (g) Molecular stacking schematic (perpendicular to the substrate plane) shown for FePc or CoPc molecules (h) structure of dimer molecule and (i) stacking of dimers in composite films.
Values of hole concentration (n 0), trap characteristics temperature (Tt ), trap denisty (Nt ), and mobility (μ) determined using J-V characteristics for CoPc, FePc, and CoPc-FePc films.
Article metrics loading...