This research paper aims at examining which silicon structure would make the best solar cell. Three different structures were used - polycrystalline, monocrystalline, and amorphous. By using different colored filters with different wavelengths, the wavelength of the incident light was altered. The current and voltage that were generated by the monocrystalline solar cell were measured for different incident light wavelengths. This was then repeated for the other 2 structures of solar cells. The analysis of the obtained data resulted in the following conclusions: 1. There is perhaps a large bandgap in the amorphous cell, as its output varies with frequency. 2. There is perhaps a small bandgap in polycrystalline cells, as at lower wavelengths, its output varies with frequency; at higher wavelengths, its output varies with intensity. 3. There is a medium-sized bandgap in monocrystalline cells. The output of the monocrystalline cell varies between the outputs of the other 2 cells. At higher wavelengths, the output varies to a certain extent with intensity; at lower wavelengths, the output varies to a certain extent with frequency. As a result, their conclusions were used in order to answer the research question that stated, “Which silicon structure makes the most effective solar cell?” There is no ideal structure for a solar cell; each structure’s effectiveness is determined by its usage. The amorphous cell is not expensive, and there is little variation in its output with a change in intensity. However, it produces relatively less power. As a result, it is highly effective for smaller-scale usages such as in watches or calculators, in environments that have low intensity. The polycrystalline cell output mainly varies with intensity, which thereby makes it useful for outdoor usages such as in deserts. At low wavelengths, it shows variation with a change in frequency, which thereby makes it useful for times such as dawn and dusk when there is bluish light. Since its production of power is much greater, it is highly suitable for larger-scale productions of energy. The monocrystalline cell has an output that is greater than the amorphous cell, but not high enough to account for its expensive cost. It is applicable on a smaller scale, such as in processor chips.