MEG Solar Cells
Solar energy exploitation is clearly of central importance for our research. However, solar conversion efficiency is restricted by the so-called Shockley-Queisser limit to a maximum efficiency of ~34% for a single-junction solar cell assuming a single electron-hole pair generation upon the absorption of a photon from solar light. In that regard, singlet-fission materials that enable multiple exciton generation (MEG) can readily circumvent the Shockley-Queisser limit by minimizing thermalization loss.
Honda Research Institute USA Inc. has been following this research strategy since early 2000's through collaboration with academia focusing on the phenomenon of MEG. A deeper understanding of MEG is highly desired to shed light on systematic design of new materials in order to pursue more efficient and versatile materials for the next-generation solar cells.