NOVELTY - A photovoltaic module (40) comprises two wedged concentrators (41-42), and a solar cell structure (45). The first wedged concentrator component has a first top surface and a first bottom surface arranged unparallel with each other. The second wedged concentrator component has a second top surface and a second bottom surface arranged unparallel with each other. The solar cell structure is mounted on a quadrilateral lateral surface of the first wedged concentrator component for receiving light from the first wedged concentrator component through the quadrilateral lateral surface    USE - A photovoltaic module.    ADVANTAGE - The photovoltaic module has reduced size and high concentration ratio.    DETAILED DESCRIPTION - A photovoltaic module (40) comprises two wedged concentrators (41-42), and a solar cell structure (45). The first wedged concentrator component has a first top surface and a first bottom surface arranged unparallel with each other. The second wedged concentrator component has a second top surface and a second bottom surface arranged unparallel with each other. The first wedged concentrator component is positioned on the second wedged concentrator component by placing the first bottom surface on the second top surface. The solar cell structure is mounted on a quadrilateral lateral surface of the first wedged concentrator component for receiving light from the first wedged concentrator component through the quadrilateral lateral surface, where the light enters and leaves the first wedged concentrator component through the first top surface and the first bottom surface, respectively, enters and leaves the second wedged concentrator component through the second top surface, further enters the first wedged concentrator component through the first bottom surface, and leaves the first wedged concentrator component through the quadrilateral lateral surface in sequence. Total internal reflection occurs on the first top surface when the light travels within the first wedged concentrator component from the first bottom surface to the quadrilateral lateral surface.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a photovoltaic module.    Photovoltaic module (40)    Wedged concentrators (41-42)    Solar cell structure (45)    Gaps (401-403)    Unparallel surfaces (C11, C12)