3.1.3. Electrical Properties

Next, the electrical properties were assessed. Room temperature currents versus voltage (I–V) characteristics of AZO thin films on glass and PET as well as ITO/glass are shown in Figure 3a–c. All performed current–voltage measurements show Ohmic behavior. As a device-relevant parameter, sheet resistance (*R*s) = 1/σ*d*, where σ is the electrical conductivity of the material and *d* is the thickness of the electrode, is used for a comparison of the transparent electrodes rather than conductivity, which is an intrinsic material property. The calculated sheet resistances are also shown in the figures.

**Figure 3.** Current–voltage characteristics of AZO thin films deposited on (**a**) glass and (**b**) PET, as well a comparison with (**c**) commercial ITO/glass, are shown for reference.
