Ray-trace simulation of CuInS(Se)₂ quantum dot based luminescent solar concentrators

To enhance the performance of luminescent solar concentrator (LSC), there is an increased need to search novel emissive materials with broad absorption and large Stokes shifts. I-III-VI colloidal CuInS2 and CuInSe2 based nanocrystals, which exhibit strong photoluminescence emissions in the visible to near infrared region with large Stokes shifts, are expected to improve performance in luminescent solar concentrator applications. In this work, the performance of CuInS(Se)₂ quantum dots in simple planar LSC is evaluated by applying Monte-Carlo ray-trace simulation. A systematic parameters study was conducted to optimize the performance. An optimized photon concentration ratio of 0.34 for CuInS2 nanocrystals and 1.25 for CuInSe₂ nanocrystals doping LSC are obtained from the simulation. The results demonstrated that CuInSe₂ based nanocrystals are particularly interesting for luminescent solar concentrator applications, especially to combine with low price Si solar cells.