Resonance-shifting luminescent solar concentrators

摘要

An optical system and method to overcome luminescent solar concentrator inefficiencies by resonance-shifting, in which sharply directed emission from a bi-layer cavity into a glass substrate returns to interact with the cavity off-resonance at each subsequent reflection, significantly reducing reabsorption loss en route to the edges. In one embodiment, the system comprises a luminescent solar concentrator comprising a transparent substrate, a luminescent film having a variable thickness; and a low refractive index layer disposed between the transparent substrate and the luminescent film.

主权项

1. A luminescent solar concentrator comprising:
a transparent substrate; a luminescent film having a laterally varying thickness, the laterally varying thickness defining a first thickness at a first location and a second thickness at a second location; and a low refractive index layer, having a refractive index of about 1.1 to about 1.2, disposed between the transparent substrate and the luminescent film; wherein the first location is spaced from the second location such that resonant emission from either of the first and the second locations of the luminescent film does not re-encounter that same resonance in reflectivity.