New Directions in InP Solar Cell Research

Recent research efforts, representing new directions in InP solar cell research, are reviewed. These include heteroepitaxial growth on silicon and gallium arsenide substrates, V-grooved cells, large area high efficiency cells and surface passivation. Improvements in heteroepitaxial cell efficiency are described together with processing of 19.1%, 4 cm/sup 2/ cells. Recommendations are made for improvements in processing leading to increased efficiencies.