Concentrator efficiencies of 29.2 for a GaAs cell and 24.8 for a mounted cell-lens assembly

摘要

A lens/cell efficiency of 24.8% has been obtained in an outdoor test using a single GaAs cell and a Fresnel lens. This is the highest efficiency ever reported for a lens/cell assembly. During the test, the cell was water-cooled to a junction temperature of 45 degrees C and the concentration ratio was 205:1. In a related test, a 29.2% cell efficiency was obtained using a GaAs concentrator cell and an Entech prismatic cover glass designed to reduce the effect of shadowing of the grid lines.