High Efficiency Concentrating Photovoltaic Power System: Cooperative Research and Development Final Report, CRADA Number CRD-07-229

Using NREL's characterization capabilities, NREL will conduct electrical, optical, and materials characterization on semiconductor samples for concentrator solar cells, grown by both NREL and Boeing-Spectrolab. NREL will also apply its solar cell fabrication expertise to develop advanced, potentially low-cost concentrator solar cell fabrication processes, e.g. improved etching, metallization, coating deposition, isolation, and other processes. NREL will extend its experience with transparent conductive coatings (TCC) to develop terrestrial concentrator cell contacts using these materials. As required, NREL will carry out metalorganic vapor phase epitaxy (MOVPE) growth development of inverted metamorphic multi-junction solar cells and compare with Boeing-Spectrolab's MOVPE growth processes.