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Communication Dans Un Congrès Année : 2013

Optical, microstructural, vibrational and theoretical studies of p-type SrCu2O2 and BaCu2O2 Transparent Conductive Oxides

Résumé

Transparent conducting metal oxides (TCO) are unusual semiconducting materials displaying transparency to visible light. TCO materials are used for electrostatic shielding, antistatic screens, transparent heating devices, solar cells and even organic light emitting diodes. However, most TCOs are n-type, while p-type TCOs are scarce. SrCu2O2 is a leading candidate as a p-type transparent conductive oxide. In this paper, we report theoretical calculations and experimental studies on the vibrational, optical and microstructural properties of both bulk and thin films of polycrystalline undoped SrCu2O2 obtained by pulsed laser deposition (PLD). Barium doping of the SrCu2O2 by substitution of Sr atoms is also reported. The simulated crystal structures of both SrCu2O2 and BaCu2O2 materials, obtained through a state-of-the-art implementation of the Density functional theory, are compared with experimental X-ray diffraction data of undoped and Ba-doped SrCu2O2 bulk materials. Raman spectra of both SCO and BCO materials are simulated from the derivatives of the dielectric susceptibility and a symmetry analysis of the optical phonon eigenvectors at the Brillouin zone center is proposed. Good agreement with Raman scattering experimental results is demonstrated.
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Dates et versions

hal-01162131 , version 1 (09-06-2015)

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Jacky Even, Laurent Pedesseau, M. Modreanu, G. Huyberechts, B. Servet, et al.. Optical, microstructural, vibrational and theoretical studies of p-type SrCu2O2 and BaCu2O2 Transparent Conductive Oxides. SPIE Photonics West - OPTO 2013, Feb 2013, San Francisco, United States. pp.86261Y, ⟨10.1117/12.2014328⟩. ⟨hal-01162131⟩
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