Light confinement in a PV module can be an important tool in decreasing the $/Wp value of a PV module. Due to internal reflections at the front glass-air interface, radiation which strikes the back layer between the cells can be directed towards the active regions. We have studied white tedlar. a commonly used lambertian back layer, but we also introduced a directional reflector which shows, although not optimised yet, promising results. Measurements of the photoresponse as a function of the distance of the incident light to the active cell area are related to the geometrical reflecting characteristics of the back surface layers. We included conditions of oblique incidence, which is -especially for the directional reflecting back layers- an important issue.
展开▼
