Full Paper Raman spectroscopic studies on pulsed laser deposited nanostructured LiCoO 2 thin film cathodes

An Journal, M Rao
2009 Nano Science and Nano Technology Nano Science and Nano Technology NSNTAIJ   unpublished
LiCoO 2 thin films; PLD, Raman. KEYWORDS ABSTRACT Thin films of LiCoO 2 were prepared by pulsed laser deposition technique. Two important deposition parameters such as substrate temperature and oxygen partial pressure during the thin film deposition were controlled. The Raman data consist of a series of broad bands located between 400 and 700cm -1 for LiCoO 2 films. The Raman band located at 592cm -1 can be viewed as the symmetric Co-O stretching vibration of CoO 6 groups. This band is assigned
more » ... is band is assigned to the A 1g symmetry. The RS peak position at 484cm -1 derives from the E g species. The symmetric motions involve Co-O stretching and O-Co-O bending vibrations. The intensity ratio increased with the increase of substrate temperature. The film deposited at 700C in pO 2 =100 mTorr, indicating that the film had no preferred orientation. 