Measured surface loss from luminescent solar concentrator waveguides... In most cases the escape cone losses are greater at the top than the bottom surface
30% external quantum efficiency from surface textured, thin-film light-emitting diodes... The reason for this shortfall is the narrow escape cone for light in high refractive index semiconductors....
This article has been accepted for inclusion in a future issue of this journal. content is final as presented, with the exception of pagination. ieee journal of photovoltaics 1 air gaps as intermediate selective reflectors to reach theoretical efficiency... The air gap provides perfect reflection for angles outside the escape cone, and the an-tireflection coating transmits angles inside the escape cone....
Intermediate mirrors to reach theoretical efficiency limits of multi-bandgap solar cells... The air gap provides perfect reflection for angles outside the escape cone, and the antireflection coating transmits angles inside the escape cone....
