Optimizing the positions of quantum dot layers to increase the light absorption in quantum dot solar cells with light trapping structure

We have investigated the effect of light trapping in quantum dot intermediate band solar cells, including the Fabry-Perot and guided diffracted mode. Using numerical simulations, we show that optimizing the positions of quantum dot layers can lead optical absorption enhancement. Further, we experimentally demonstrate that placing the InAs/GaAs quantum dot layers at the intensity peaks of the resonance results in an absorption enhancement. This effect can be used to improve device performance of solar cells as well as, photodetectors.