A solar concentrator structure including a plurality of glass concentrator elements with a notch design. According to an embodiment, the present invention provides a solar cell concentrator structure. The structure includes an outside surface. The structure also includes an inside surface, the inside surface being substantially flat. The structure includes a first concentrator element integrally formed on the outside surface, the first concentrator element having a first curved surface, the curved surface being characterized by a radius of at least 1 mm, the curved surface having a first flat region of at least 0.25 mm, the flat region being at least 4 mm from the inside surface. The structure includes a second concentrator element integrally formed with the first concentrator element and the outside surface, the second concentrator element including a second curved surface and a second flat region.