Berlin 2012 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 25: Poster Session: GaN - Optical Properties & Preparation and Characterization & Devices

HL 25.5: Poster

Monday, March 26, 2012, 16:00–19:00, Poster D

Vibrational spectra of different phases of Cu_xO_y — •Christian Reindl, Thomas Sander, Daniel Reppin, Bruno K. Meyer, and Peter J. Klar — I. Physikalisches Institut, Justus Liebig University, Heinrich-Buff-Ring 16, 35392 Giessen

The vibrational spectra of different phases of copper oxide – CuO, Cu₂O and Cu₃O₄ – are investigated. The Raman spectra of the three phases differ in the number of Raman active modes and exhibit variations in the peak positions of the signals. To establish a relationship between growth condition and crystal phase obtained, a series of sputtered thin-film samples with varied oxygen concentrations was studied by Raman spectroscopy. The Raman spectra were recorded in backscattering geometry at room temperature using an 633 nm excitation laser. In addition, Raman spectra were obtained during in-situ tempering to study the stability of the various phases. Raman depth scans were performed to investigate changes of the copper oxide phase as a function of sample thickness.