(JP11017201-A)      A solar cell comprises an n-type diffusion layer (103) formed at a light receiving side of an intrinsic or low concn. p-type semiconductor crystal substrate (100). High concn. p-type diffusion layers (102) are formed locally at a side opposite to the light receiving side of the substrate (100), and a layer (v) having a crystal defect or being amorphous by ion implantation is formed at a region between the locally high concn. p-type diffusion layers (102). Electrodes (105,106) are connected to the respective diffusion layers (103,102). Also claimed is a method of fabricating a solar cell.    USE -   Improved efficiency solar cell and a method of fabrication.    ADVANTAGE -   By forming the defect layer or amorphous layer at a region opposite to the light receiving surface of the solar cell, light of a wavelength region that could not effectively be absorbed within the bulk can be photoelectric converted, and cell efficiency improved. Easily controllable ion implantation provides a stable and highly reliable solar cell.    (US6130380-A)      A solar cell comprises an n-type diffusion layer (103) formed at a light receiving side of an intrinsic or low concn. p-type semiconductor crystal substrate (100). High concn. p-type diffusion layers (102) are formed locally at a side opposite to the light receiving side of the substrate (100), and a layer (v) having a crystal defect or being amorphous by ion implantation is formed at a region between the locally high concn. p-type diffusion layers (102). Electrodes (105,106) are connected to the respective diffusion layers (103,102). Also claimed is a method of fabricating a solar cell.    USE -   Improved efficiency solar cell and a method of fabrication.    ADVANTAGE -   By forming the defect layer or amorphous layer at a region opposite to the light receiving surface of the solar cell, light of a wavelength region that could not effectively be absorbed within the bulk can be photoelectric converted, and cell efficiency improved. Easily controllable ion implantation provides a stable and highly reliable solar cell.