Tessema, Genene (PhD)Nigussa, Zelalem2018-07-102023-11-092018-07-102023-11-092005-06http://10.90.10.223:4000/handle/123456789/7608This thesis is based on the experimental investigation of the junction between reactive low work function metal, Aluminum and Conjugated polymer, MDMO-PPV. The polymer is blended with C60 and the composition were also made with pure polymer. The techniques employed are absorption spectroscopy, current-voltage characteristics measurement and complex impedance spectroscopy. The absorption measurement shows that MDMO-PPV is a semiconductor with energy band gap of about 2.0032eV. The current density-voltage curve is found to be asymmetric and non-ohmic and shows Schottky barrier type recti¯cation. The recti¯cation ratio of fullerene blended MDMO-PPV is found to be 100 whereas that of pure MDMO-PPV is between 10 and 20, and more diode characteristics are observed in the case of fullerene blended polymer. The complex impedance spectra are single semi-circle displaced from the origin that show the existence of mobile charge depleted regions with some contact resistance. The radius of the semi-circle is found to depend on the bias of the junctionenJunction Studies between Aluminum and PolymerThesis