A model based on the aspect of the distribution of the length of conduction paths accessible for electric charge flow reproduces the universal power-law dispersive ac conductivity observed in polymer networks and, generally, in disordered matter.Power exponents larger than unity observed in some cases are physically acceptable within this model. A saturation high frequency region is also predicted, in agreement with experimental results. There does not exist a 'universal fractional power law' (and is useless searching for a unique common critical exponent), but a qualitative universal behavior of the ac condductivity in disordered media.

The surface passivation effect of SF6 plasma on ZnO films for application in polymer solar cells is demonstrated.

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