Tunable Bandgap GaInAsP Solar Cells With 18.7% Photoconversion Efficiency Synthesized by Low-Cost and High-Growth Rate Hydride Vapor Phase EpitaxyJain, Nikhil; Simon, John; Schulte, Kevin L.; Friedman, Daniel J.; Diercks, David R.; Packard, Corinne E.; Young, David L.; Ptak, Aaron J. · IEEE Journal of Photovoltaics · 2018