Daniel J. Friedman

Band Anticrossing in GaInNAs Alloys

W. Shan, W. Walukiewicz, Joel W. Ager et al. · Physical Review Letters · 1999 · 1.6K citations

Materials Science, Materials Engineering, Conduction Band +15

A 28-GHz 32-Element TRX Phased-Array IC With Concurrent Dual-Polarized Operation and Orthogonal Phase and Gain Control for 5G Communications

Bodhisatwa Sadhu, Yahya Tousi, Joakim Hallin et al. · IEEE Journal of Solid-State Circuits · 2017 · 558 citations

Millimeter Wave Technology, Engineering, 5G System +11

40.8% efficient inverted triple-junction solar cell with two independently metamorphic junctions

John F. Geisz, Daniel J. Friedman, Jas S. Ward et al. · Applied Physics Letters · 2008 · 480 citations

Engineering, Organic Solar Cell, Photovoltaic Devices +21

1-eV solar cells with GaInNAs active layer

Daniel J. Friedman, John F. Geisz, Sarah Kurtz et al. · Journal of Crystal Growth · 1998 · 416 citations

Electrical Engineering, Engineering, Applied Physics +4

High-efficiency GaInP∕GaAs∕InGaAs triple-junction solar cells grown inverted with a metamorphic bottom junction

John F. Geisz, Sarah Kurtz, M. W. Wanlass et al. · Applied Physics Letters · 2007 · 394 citations

Wide-bandgap Semiconductor, Engineering, Organic Solar Cell +19