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Optical transmission spectra of the differently treated samples deposited at room temperature. The energy scale was shifted in respect to the determined bandgap of each individual sample.
(a) Absorption coefficient calculated from R and T measurements and respective fit for ZnO:Al deposited at room temperature and i-ZnO for all investigated post-deposition treatments. The inset shows a fit to the doped sample in the as deposited state using the error function only (see Eq. (2) ). (b) Urbach energy of the band tails as function of the deposition temperature and post-deposition treatment for i-ZnO and ZnO:Al.
Hall mobility as a function of Ne of doped samples in the as deposited state and after the different thermal treatments. Numbers indicate the original deposition temperature.
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