Transparent Conductive Oxides (TCO) are important materials used as transparent electrodes in energy production (solar cells), lighting (LED) and in flat panels. In spite of scientific efforts already devoted to these transparent conductors, electro-optical propertiesof TCOs are still limited and several processing issues remain. Among TCOs, the doped tin oxide layers exhibit interesting properties and are not affected by the shortage related to Indium (the case for ITO).

The project will concern the preparation of doped tin oxide layers (using spray pyrolysis as well as sputtering) and aim at identifying the relation between structural, optical, and electronic properties in dependence on the nature and concentration of the dopant . The structural properties concern the characteristics that affect the integration of TCO’s into devices, including grain structure and roughness for instance, the optical ones deal with absorption and scattering (diffuse or not) while the electronic properties concern band structure, work function and carrier scattering mechanisms which limit the carrier mobility. Integration of such layers in solar cell devices further requires control of surface and interface properties. The present project will include experimental studies and simulations and address both fundamental and application oriented aspects of TCO materials.>

Project Partners

Laboratoire des Matériaux et du Génie Physique (LMGP); Grenoble Institute of Technology (Grenoble, France),  : spray pyrolysis deposition set-up, Fluorine doped SnO2 layers deposition of large areas (150 cm2), physical and structural characterization methods (GIXRD, TEM, SEM…)…

Institute of Materials Science, Surface Science Division; Technische Universität Darmstadt (Germany); magnetron sputtering of doped SnO2 layers,  Chemical surface analysis, Hall effects and conductivity measurments,  Simulation Program for optical properties, standard analysis equipment (XRD, SEM, AFM, SIMS, impedence…)

Solar Print, CTO Dublin, Ireland. SolarPrint develops photovoltaic energy technologies. This company develops Dye-Sensitised Solar Cells (DSSC), a third-generation printable solar cell technology. Doped SnO2 layers are integrated in such DSSCs. see www.solarprint.ie