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High resolution XRD scans of the monoclinic (−111) peak. The vertical line indicates the position of this peak in a perfect lattice.
vs for all film states. The dashed line is a linear regression analysis , for data in which decreases linearly with increasing . The solid horizontal line indicates in a perfect lattice. The intersection of these lines indicates the value at which becomes insensitive to crystallite size.
vs E for the as-grown and annealed film states.
vs E for and the linear regression fit to the data. Extrapolation of the data to yields the values of the optical band gap, , listed in the figure.
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