We report on a copper phthalocyanine (CuPc)/3,4,9,10 perylenetetracarboxylic bisbenzimidazole (PTCBI) organic solar cell with an aluminum cathode exhibiting an open-circuit voltage (VOC) of 1150 mV and a short-circuit current density (JSC) of 0.125mA∕cm2. For comparison, aluminum and silver were used as electrode materials and their effects on device characteristics were studied; silver yielded lower VOC but higher JSC and higher efficiency. Results could be understood through a model that hypothesized surface modification of CuPc by PTCBI and the formation of a thin insulating layer between aluminum and PTCBI when aluminum was used as electrode.

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A template-assisted assembly technique combined with a chemical synthesis approach has been used to produce high density magnetic cobalt nanowire arrays. Cobalt nanowires were formed using chemical synthesis techniques, by borohydride reduction of cobalt salt in the pores of anodic aluminum oxide (AAO) templates; the samples were annealed in order to achieve nanowires with hcp crystal structure. The morphology and the crystal structure were controlled by the template geometry and annealing conditions, respectively. Magnetic property measurements showed the influence of morphology and crystal structure on the magnetic properties of the arrays.