ELECTRICAL AND PHOTOVOLTAIC PROPERTIES OF A 2-LAYER ORGANIC PHOTOVOLTAIC CELL

Electrical and photovoltaic characteristics of an organic p-n junction photovoltaic cell are described. The two-layer organic cell is fabricated from copper phthalocyanine (CuPc) as p-type organic semiconductor and 5,10,15,20-tetra(4-pyrydil)21H,23H-porphyne (TPyP) as n-type organic semiconductor. The p-n junction cell with a thin film of TPyP exhibits stronger spectral sensitivity and better spectral matching to a solar spectrum than the Schottky cell using either CuPc or TPyP layer. The interface between the two organic materials, rather than the electrode/organic contacts, is crucial in determining the photovoltaic properties of the cell.