Improving polymeric materials for use in solar cell applications Lattice-matched semiconductor materials for optoelectronic devices Solar rechargeable battery Electro-optical or PV cell, and its fabrication Solar simulator with movable filter Combination PV cell and RF antenna Forming zinc oxide film, and producing PV device Synthesis of layers, coatings or films using electrostatic fields Solar power generation apparatus and control method Power converter integrated solar cell module Solar cell device Transparent electrode comprising ZnO and a film with a melting point lower than that of ZnO