NOVELTY - A solar cell concentrator (300) comprises first concentrator element (301) having first aperture region (304) and a first exit region including a first back surface region and a first corner region; another concentrator element having another aperture region and second exit region second back surface region; first coupling region between first exit region and first surface region of a first photovoltaic device; another coupling region between second exit region and second surface region of a second photovoltaic device; and triangular shaped region including an apex (316).    USE - Solar cell concentrator structure for solar panels, e.g. modules.    ADVANTAGE - The solar cell concentrator structure provides improved solar cell efficiency.    DETAILED DESCRIPTION - A solar cell concentrator (300) comprises:    (1) a first concentrator element (301) having first aperture region (304) and a first exit region including a first back surface region and a first corner region;    (2) another concentrator element formed with the first concentrator element, and having a second aperture region and a second exit region second back surface region and a second corner region;    (3) first radius which is less than 0.25 mm characterizing the first comer structure and the second comer structure;    (4) first coupling region between the first exit region and a first surface region of a first photovoltaic device;    (5) another coupling region between the second exit region and a second surface region of a second photovoltaic device;    (6) separation region (312) between the concentrator element, and having a width separating the exit regions;    (7) another radius of curvature which is less than or equal to 0.15 mm characterizing a region between the concentrator element;    (8) triangular shaped region including an apex (316) defined by the radius of curvature and a base defined by the separation region; and    (9) refractive index of 1 characterizing the triangular region.    An INDEPENDENT CLAIM is included for a method of manufacturing a solar cell.    DESCRIPTION OF DRAWING(S) - The drawing is a simplified diagram of notch structures for a solar cell concentrator.    Concentrator (300)    Concentrator element (301)    Aperture region (304)    Separation region (312)    Apex (316)