Figure 1: Conventional bulk-doped (a) and thin-film (b) LSC designs utilizing edge-mounted solar cells. Front-facing bulk-doped (c) and thin-film (d) LSC designs. Dye molecules are dispersed throughout the waveguiding material in the bulk-doped device and applied in a concentrated layer to the backside of the thin-film device. Both designs rely on total internal reflection in the waveguide to concentrate light.