NOVELTY - The element has a dye (6) adsorbed as a unimolecular layer on a surface of a porous semiconductor layer (5). A porous carbon conductive layer (8) is made in contact with a main surface of two translucent conductive layers (3, 4) and provided on a porous insulating layer and one of the translucent conductive layers. A sealing member (9) is enclosed on the insulating layer and the carbon conductive layer. An electric charge transport layer (10) is enclosed in the sealing member that is provided in a micropore of the semiconductor layer, the insulating layer and the carbon conductive layer.    USE - Photoelectric conversion element such as an electric motor and an illuminating device for use as an electric power generation unit in a photovoltaic apparatus (claimed) i.e. photovoltaic solar cell, that is installed in a roof and a wall surface of a building.    ADVANTAGE - The element is provided with a monolithic structure so as to easily avoid volatilizing of the electric charge transport layer, thus reducing the cost and increasing the durability of the element. The dye absorbs light energy in an efficient manner. The element avoids thermal decomposition on the translucent conductive layers and the porous carbon conductive layer.    DETAILED DESCRIPTION - The porous carbon conductive layer is made of amorphous carbon or graphite carbon. The porous insulating layer is made of zirconium oxide or aluminum oxide. The porous semiconductor layer is made of titanium dioxide, tungsten oxide, zinc oxide, niobium pentoxide, tantalum pentoxide or strontium titanate. The translucent conductive layers are made of fluorine doped tin oxide, indium-tin oxide, gallium doped zinc oxide, aluminum doped zinc oxide or niobium doped titanium oxides. The electric charge transport layer is made of copper thiocyanate or copper iodide. The dye is a ruthenium dye, porphyrin dye or indoline dye.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a photoelectric conversion element.    Translucent conductive layers (3, 4)    Porous semiconductor layer (5)    Dye (6)    Porous carbon conductive layer (8)    Sealing member (9)    Electric charge transport layer (10)