ZnO and MgZnO Nanocrystalline Flexible Films: Optical and Material Properties
Figure 10
(a) The Raman spectra of the unstrained FEP and the ZnO film (lower two traces) and the spectrum of ZnO film under mechanical deformation (upper trace). The spectra of the ZnO exhibit the LO Raman mode. The deformation resulted in a ~2 ± 1 cm−1 redshifted frequency, implying that the ZnO itself is under negligible stress. (b) The Raman spectra of the unstrained FEP (lower trace) and that of the ZnO film (middle trace) showing the Raman modes of the FEP. The redshift of the FEP Raman modes indicates that the underlying FEP substrate is under tensile stress. The spectrum of the deformed film (upper trace) implies that the deformation has no impact on the underlying FEP substrate. The 2LO is the second order-mode of ZnO.
