18. R. J. Ellingson, M. C. Beard, J. C. Johnson, P. Yu, O. I. Micic, A. J. Nozik, A. Shabaev, and A. L. Efros, “Highly efficient multiple exciton generation in colloidal PbSe and PbS quantum dots,” Nano Lett. 5(5), 865–871 (2005). 19. L W. Wang, M. Califano, A. Zunger, and A. Franceschetti, “Pseudop[r]