Figure 4From: Improvement of the physical properties of ZnO/CdTe core-shell nanowire arrays by CdCl2 heat treatment for solar cellsRaman scattering measurements. Room-temperature Raman measurements of (a) as-grown and (b) annealed ZnO/CdTe core-shell NW arrays at 450°C for 1 h obtained by laterally moving the stage each 200 nm. The Raman spectra collected by moving the stage each 3 μm are identical. The excitation power and beam size are 2.5 mW and 1 μm, respectively.Back to article page