Solaero Technologies Corp.

Christopher Kerestes

Daniel Derkacs

Steven Whipple

John Hart

Clayton Cozzan

Michael W Riley

A solar cell comprising an epitaxial sequence of layers of semiconductor material thrilling at least a first and second solar subcells; a semiconductor contact layer disposed on the bottom surface of the second solar subcell; a reflective metal layer disposed below the semiconductor contact layer such that the reflectivity of the reflective metal layer is greater than 80% in the wavelength range 850 to 2000 nm, for reflecting light back into the second solar subcell.

Inverted metamorphic multijunction solar cell

A metamorphic multijunction solar cell having a growth semiconductor substrate with a top surface having a doping in the range of 1x10to 1x10charge carriers/cm; a window layer for a top (light facing) subcell formed directly on the top surface of the growth substrate; a sequence of layers of semiconductor material forming a solar cell directly on the window layer; a surrogate substrate on the top surface of the sequence of layers of semiconductor material, wherein a portion of the semiconductor substrate is removed so that only the high doped surface portion of the substrate, having a thickness in the range of 0.5 &#x3bc;m to 10 &#x3bc;m, remains.

A method of manufacturing an inverted metamorphic multijunction solar cell by providing a growth semiconductor substrate with a top surface having a doping in the range of 1&#xd7;10to 1&#xd7;10charge carriers/cm; depositing a window layer for a top (light facing) subcell subsequently to be formed directly on the top surface of the growth substrate; depositing a sequence of layers of semiconductor material forming a solar cell directly on the window layer; providing a surrogate substrate on the top surface of the sequence of layers of semiconductor material, and removing a portion of the semiconductor substrate so that only the high doped surface portion of the substrate, having a thickness in the range of 0.5 &#x3bc;m to 10 &#x3bc;m, remains.

Growing community of inventors

Albuquerque, NM, United States of America

Christopher Kerestes