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(Color online) AFM amplitude images of sample B O face prior to (a) and after (b) in . A granular structure occurs as an effect of the treatment.
Room temperature characteristics of selected SCs in the as-deposited state for the treated samples A and B. The inset shows the curves of the control samples, i.e., the coventionally cleaned ones.
Comparison of the characteristics of one SC on sample A before and after annealing at for in air. The ideality factor vs effective voltage for an annealed contact on sample A is displayed in the inset.
(Color online) (a) Typical carrier concentration profile in the (0001) direction determined by measurements performed at . (b) An example of measurements for sample B showing the freezing out of electrons and the inset displays the corresponding Arrhenius plot for evaluating the activation energy of the electron state that is estimated at .
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