Results from ongoing development of spatial and spectral
quality of RIT’s dual source solar simulator are presented.
This simulator as designed qualifies as class A for both
AM0 and AM1.5, depending on the filter set used.
Measurements were made of spatial intensity uniformity,
as well as spectral uniformity across the 300 mm diameter
beam under calibrated AM0 conditions. The beam exhibits
intensity non-uniformity across the 300 mm diameter test
plane of 5.89%, though typically cells can be measured in
a 10 cm x 10 cm central region of 1.13% non-uniformity.
Spectral match and spectral mismatch values were
calculated for specific spectral regions and device
structures, respectively, which verified a close match to
both AM0 and AM1.5G, especially in the region most
commonly used for triple junction solar cells. Results of a
set of ten Emcore BTJs measured at Emcore, Aerospace
Corporation, NASA Glenn Research Center, and RIT,
were compared. It was found that RIT’s simulator
produced figures of merit such as VOC, ISC, fill factor, and
efficiency, for these cells to within 2% of the other
facilities.