EMCORE four-junction inverted metamorphic solar cell development

EMCORE grown and tested four-junction terrestrial concentrator inverted metamorphic multijunction (CIMM) devices have been demonstrated with internally measured typical efficiencies of ∼44% and peak efficiencies as high as ∼47%, which are in the realm of world record performance. Improved internal testing as well as external validation by NREL are in progress.