Abstract:
In modem light sources such as Luminescent Solar Concentrators (LSC's) and Light
Emitting Diodes (LED's), light is emitted within a light-guiding structure of high refractive
index. Some of this light is trapped, and will not be able to escape. Similar problems are
observed when collecting fluorescent radiation in waveguides [I] and scintillation detectors
[2]. For lighting applications, this trapped light should be able to escape the light-guiding
structure. In LED's this is commonly achieved with a special profile in the active zone.
However, in LSC's the small light-emitting zone is remote from the large light collector so a
different approach must be taken. This paper will focus on the extraction of emitted light
from rectangular LSC's, and propose a way of extracting a large fraction of the trapped light.
