TECHNOLOGY FOCUS - POLYMERS - Preferred Method: The step (c) further comprises: curing the first mixture and the second mixture to form the first layer body and the second layer body, respectively, with a thermal curing agent or a light curing agent, thus forming the waveguide body; and heating the first mixture to remove the organic solvent. The step (c) comprises: partially curing the first mixture and the second mixture, thus allowing the at least a solar cell to be embedded in the waveguide body; and shaping the waveguide body. Preferred Components: The luminescent dye is an organic luminescent dye or a luminescent quantum dot. The solution comprises an organic solvent, and the luminescent dye is dissolved in the organic solvent. The organic solvent is an alcohol, ether or ketone. The first waveguide material and the second waveguide material are respectively polymethylmethacrylate, polyvinyl alcohol, polyvinyl pyrrolidone and polydimethylsiloxane. The nano-powder is one of titanium dioxide, barium sulfate, zinc sulfide, nylon powder or metal oxide particles. The mold has a micro-structure disposed on its inner wall, and a light-guiding structure corresponding to the micro-stricture is formed on at least one of the top surface and the bottom surface of the waveguide body. EXAMPLE - 4.5 ml of Polydimethylsiloxane (PDMS) was provided in a container, 0.3 ml of solution-1 (0.08 g of green fluorescent dye (C545T) in 16 ml of ethanol) and 0.2 ml of solution-2 (0.001 g of rhodamine 640 in 5 ml of ethanol) were provided in the container to be mixed thoroughly. After solution-1, solution-2, and PDMS were well mixed, the container was placed on a heating plate at 90-120 degrees C to accelerate the volatilization of ethanol. After the ethanol was completely volatilized, 0.45 ml of a thermal curing agent was provided into the PDMS mixture (volume ratio PDMS:curing agent of 10:1) containing the organic luminescent dye. After well mixed, the mixture was placed in a vacuum chamber to remove bubbles. After the bubbles were removed, the PDMS mixture was poured into a mold with two silicon solar cell chip having area as 2x 0.7 cm2 placed at lateral sides, in which the bottom of the mold was flat, and the mold was placed on a heating plate at 100-120 degrees C to be heated and cured. The titania powder was mixed with PDMS thoroughly (titania:PDMS 0.2 g:1.8 ml), 0.18 ml of a thermal curing agent was added after the titania powder and PDMS were well mixed. After the PDMS containing the organic luminescent dye was heated and cured (for 15-20 minutes), the PDMS mixture containing titania was poured into the mold as a bottom scattering layer. PDMS mixture was heated until the PDMS mixture was completely cured, the mold was removed from the heating plate, the module was removed from the mold after being cooled to produce the solar cell module.