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1. (WO2013163231) RESISTANCE COMPONENT EXTRACTION FOR BACK CONTACT BACK JUNCTION SOLAR CELLS

Pub. No.:    WO/2013/163231    International Application No.:    PCT/US2013/037863
Publication Date: Fri Nov 01 00:59:59 CET 2013 International Filing Date: Wed Apr 24 01:59:59 CEST 2013
IPC: H01L 31/04
G01R 27/00
Applicants: SOLEXEL, INC.
Inventors: KOMMERA, Swaroop
KAPUR, Pawan
MOSLEHI, Mehrdad, M.
Title: RESISTANCE COMPONENT EXTRACTION FOR BACK CONTACT BACK JUNCTION SOLAR CELLS
Abstract:
Methods for testing electrical parameters on a back contact solar cell. A first layer of electrically conductive metal having an interdigitated pattern of base electrodes and emitter electrodes is formed on the backside surface of a crystalline semiconductor solar cell substrate. An electrically insulating layer is formed on the first layer of electrically conductive metal which provides electrical isolation between the first layer of electrically conductive metal and a second layer of electrically conductive metal. Vias are formed in the electrically insulating layer which provides access to the first layer of electrically conductive metal. A second electrically conductive metallization layer is formed on the electrically insulating layer and contacts the first electrically conductive metal layer through the vias. An electrical parametric value is extracted from the back contact crystalline semiconductor solar cell by probing said the electrically conductive metallization layer with an electrical current or voltage.