Currently there are many different methods in which quantum dots (QDs) are used to improve efficiencies of solar cells. However, most mechanisms are costly and need to be replaced frequently due to a lack of resistance to outdoor conditions, especially heat. This experiment explores a potential application of QDs that is simple, relatively inexpensive, and quite resistant to weathering and heat using an epoxy adhesive. The epoxy coating is shown to have a minimal effect on the voltage output of a traditional polycrystalline solar cell, most likely due to its transparent properties, and, therefore, can act as a reasonable mechanism in creating a thin QD film on the surface of a solar cell.
Solar cell efficiencies of QD-coated and non-coated cells are determined based on the slope of a graph of intensity versus current. Ultimately, slightly improved efficiencies are achieved at wavelengths of 457.9 and 496.6 nm, but are not achieved at wavelengths of 476.5, 488.0, 501.5, and 514.5 nm. Therefore, it cannot be conclusively stated that, based on the QDs utilized in experimentation, this mechanism improves solar cell efficiencies.