  We investigate the connection between photonic local density of states and
luminescent solar concentrator (LSC) performance in two manufacturable
nanocavity LSC structures, a bilayer slab and a slab photonic crystal.
Finite-difference time-domain electromagnetic simulations show that the
waveguided luminescence photon flux can be enhanced up to 30% for the photonic
crystal design over a conventional LSC operating in the ray optic limit
assuming the same number of excited lumophores. Further photonic engineering
could realize an increase of up to one order of magnitude in the flux of
waveguided luminescence.
