Structural and vibrational studies of Mo and In-doped ZnO sprayed thin films

This paper deals with the structural and Raman properties of Mo and In doped ZnO sprayed thin films growing onto glass substrates. The structural investigations of these films were made by X-ray diffraction technique. It was found that undoped as well as doped thin films crystallize in the wurtzite structure with crystallites oriented preferentially along (0 0 2) direction perpendicular to substrate plane. The vibrational study revealed a broad identification of the observed vibration modes, and showed that E2high mode is located at (438±0.8) cm−1438±0.8 cm−1 for different studied ZnO thin films, thus confirming the wurtzite ZnO structure. Six additional vibration modes were highlighted in ZnO, four local vibration modes (LVMs) related to doping Mo (∼ 246 and 421 cm−1), In (∼ 237 and 420 cm−1), MonOm (∼ 306 and 354 cm−1), InnOm (∼ 311 and 354 cm−1), and two Raman modes (∼ 155 and 170 cm−1) activated for the first time to our knowledge.