NOVELTY - Solar cell (290), comprises: a substrate; a first transparent electrode (220) on the substrate; a first positive-intrinsic-negative (PIN) junction semiconductor layer on the first transparent electrode; a second transparent electrode on the first PIN junction semiconductor layer; and a light collecting means on the second transparent electrode, where the light collecting means includes a self assembly monolayer having a strong hydrophobicity and many microlenses having a hydrophilicity on the self assembly monolayer.    USE - The solar cell is useful for fabricating microlens (claimed).    ADVANTAGE - The solar cell provides improved productivity of the microlens in simple and accurate form with improved light capture property, in a reduced fabrication time and cost.    DETAILED DESCRIPTION - Solar cell (290), comprises: a substrate; a first transparent electrode (220) on the substrate; a first positive-intrinsic-negative (PIN) junction semiconductor layer on the first transparent electrode, where the first PIN junction semiconductor layer includes a negative (N) type semiconductor layer (223) on the first transparent electrode, an intrinsic semiconductor layer (226) on the N type semiconductor layer and a positive (P) type semiconductor layer (229) on the intrinsic semiconductor layer, and the N and P type semiconductor layers include silicon doped with N and P type impurities, respectively, and the intrinsic semiconductor layer includes hydrogenated silicon; a second transparent electrode on the first PIN junction semiconductor layer; and a light collecting means on the second transparent electrode, where the light collecting means includes a self assembly monolayer having a strong hydrophobicity and many microlenses having a hydrophilicity on the self assembly monolayer. An INDEPENDENT CLAIM is also included for fabricating a solar cell, comprising: forming the first transparent electrode; forming the first self assembly monolayer; forming the first positive-intrinsic-negative (PIN) junction semiconductor layer; forming the second transparent electrode; and forming the light collecting means.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of the solar cell including a microlens as a light collecting means.    First transparent electrode (220)    Negative type semiconductor layer (223)    Intrinsic semiconductor layer (226)    Positive type semiconductor layer (229)    Solar cell (290)