Role of Oxygen Vacancies in the Electrical Properties of WO_3−x Nano/Microrods with Identical Morphology

Figure 6

Characteristic I-V curves of the devices fabricated with the obtained WO_3−x crystals in different levels of relative humidity: (a) WO₃, (b) WO_2.90, (c) W₁₉O₅₅, and (d) W₁₈O₄₉.

(a)

(b)

(c)

(d)