“Doped ZnO powders for photovoltaic applications”

L.C. DAMONTE; V.DONDERIS; J.OROZCO-MESSANA; M.A:HERNANDEZ-FENOLLOSA

Simposio; 17th International Symposium on Metastable, Amorphous and Nanostructured Materials, (ISMANAM 2010); 2010

Doped ZnO powders were prepared by mechanical milling from metal oxides (In2O3, Al2O3) or pure metals (In, Al). The Al+3 or In+3 act as donor impurities in the ZnO lattice leading to different optical and electrical behaviors in relation with its application in photovoltaic devices. According to initial conditions (precursor, concentrations, atmosphere, etc.) and milling times, different intermediate and final phases were obtained. We have performed structural and optical characterization of the resulting doped-ZnO powders by means of X-Ray Diffraction, Positron Annihilation Lifetime Spectroscopy, Scanning Electron Microscopy and Optical Reflection Spectroscopy.