INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Structural characterization of mechanical milled ZnSe and ZnTe powders for photovoltaic devices
J.HOYA; J.I.LABORDE; L. C. DAMONTE
Congreso; 4ºCongreso Nacional - 3° Congreso Iberoamericano Hidrógeno y Fuentes Sustentables De Energía (HYFUSEN 2011); 2011
II-VI semiconductors are of interest due to their potential application as photovoltaic devices like hybrid solar cells. The efficiency of these devices may be improved mainly increasing charge carriers densities and interfacial processes. In order to reach this last purpose nanocrystalline materials are the best option as solar cells constituents. In this work we present a structural characterization of nanocrystalline ZnSe and ZnTe semiconductors obtained by mechanical milling. The samples were analyzed by X-ray diffraction (XRD) and positron annihilation lifetime (PALS) measurements. PALS results were compared with ab-initio simulations using the MIKA program. The two component density functional theory framework (TC-DFT) with the generalized gradient approximation (GGA) was applied.