NOVELTY - The cell (2) has an n-type semiconductor layer (22) formed on an electrode layer (21). A light absorber (25) is formed on the n-type semiconductor layer. A p-type semiconductor layer (23) is formed on the light absorber such that the light absorber is placed between the n-type semiconductor layer and the p-type semiconductor layer. The light absorber is less in thickness than the n-type semiconductor layer and the p-type semiconductor layer. Another electrode layer (24) is formed on the p-type semiconductor layer. The semiconductor layers are made of inorganic material and organic material.    USE - Organic solar cell.    ADVANTAGE - The light absorber is placed between the n-type semiconductor layer and the p-type semiconductor layer for absorbing light energy, so that the p-type semiconductor layer is required to have high carrier mobility without having strong light-absorbing capability, thus avoiding probability of carrier recombination during conduction, and hence reducing energy loss. The cell allows a highest occupied level of the light absorber to be positioned between a conduction band of the n-type semiconductor layer and conduction band of the p-type semiconductor layer so as to reduce obstacles of mobility of electrons and holes upon the light absorber absorbing the carrier. The cell controls the conduction band and valence band of material of the light absorber to avoid energy barrier between the light absorber and the n-type and p-type semiconductor layers, so that the electron and a hole can be moved into the n-type and p-type semiconductor layers. The cell sets light absorptance of the light absorber to about 100 times greater than the p-type semiconductor layer and the n-type semiconductor layer so as to prevent the p-type semiconductor layer and the n-type semiconductor layer from absorbing solar energy.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for fabricating a solar cell.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of an organic solar cell.    Organic solar cell (2)    Electrode layers (21, 24)    N-type semiconductor layer (22)    P-type semiconductor layer (23)    Light absorber (25)