NOVELTY - The solar cell has a cathode that is formed on a substrate. A cathode buffer layer is formed on the cathode. An organic conversion layer is formed on the cathode buffer layer. An anode is formed on an organic photoelectric conversion layer. The substrate and the anode and the cathode are indium tin oxide glass. The cathode buffer layer contains zinc oxide or titania.    USE - Semi-transparent inverted organic solar cell.    ADVANTAGE - The power conversion efficiency of the solar cell can be improved by adjusting the thickness of the anti-reflection layer and transmission spectrum of the cathode can be adjusted, hence solar cell can be manufactured efficiently.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacturing method of semi-transparent inverted organic solar cell, which involves cleaning indium tin oxide glass with acetone, isopropylketone and deionized water repeatedly, performing ultrasound treatment for 8-20 minutes and drying glass, dropping mixed solution of ethanol (20-40 ml), deionized water (5-15 ml) and 0.2-0.3 mol/l of hydrochloric acid (1-3 ml) to solution containing tetrabutyl titanate (5-20 ml), ethanol (40-80 ml) and acetylacetone (3-10 ml) at room temperature, stirring the contents for 1-5 hours to obtain titania sol, coating the sol on the glass by spin coating at 1000-5000 rpm, sintering the coated glass for 1.5-3 hours at 400-500 degrees C to form titania with thickness of 10-30 nm, coating chlorobenzene solution of poly(3-hexylthiophene) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 (PCBM) in the mass ratio of 1:0.6-1 or chlorobenzene solution of poly(2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene) (MEH-PPV) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 (PCBM) in the mass ratio of 1:2-5 or mixture of poly(2-methoxy-5-(3,7-dimethyloctyloxy)-1,4-phenylene vinylene) (MDMO-PPV) and PCBM in the mass ratio of 1:2-5 on the titania coated substrate and vacuum drying the substrate at 120-200 degrees C for 5-20 minutes to form organic photoelectric conversion layer with thickness of 70-200 nm. The concentration of the organic material in chlorobenzene solution is 10-40 mg/ml. The prepared substrate is transferred to a thermal evaporation system to form an electrode.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the solar cell.