Abstract: In this study, a method was proposed to construct a Luminescent Solar Concentrator (LSC). Two organic dyes (Acriflavine and Eosin Y) were dissolved in ethanol liquid and mixed with the addition of epoxy risen to fabricate eight panels of LSC with two different panel thickness (0.5, 1 mm) and different dyes concentrations (2×10–5, 3×10 –5, 6×10–5, 10×10–5 mol/L). The efficiency of silicon solar cell was measured before and after the use of LSC. Experiments showed that the best results were in 2×10–5 mol/L concentration with thickness 1 mm. Results showed that the efficiency was increased from (8.183-9.922%).