Patent ID: 8466003

Claim:
A method of forming a crystalline silicon solar cell test substrate, comprising: depositing a diffusion barrier material onto a frontside and a backside of a crystalline silicon substrate; placing the crystalline silicon substrate in a combinatorial wet processing tool to process a plurality of site-isolated regions with the following processes: etching the diffusion barrier from the frontside of the substrate in the plurality of site-isolated regions to expose regions of crystalline silicon; texturing the regions of crystalline silicon using a texturing solution to form a plurality of textured regions; cleaning the plurality of textured regions; applying a first dopant as a liquid, paste, or gas to the plurality of textured regions; firing the substrate in a first furnace step, wherein a portion of the first dopant diffuses into each of the textured regions; forming a photoresist mask over a portion of each of the site-isolated regions; exposing the unmasked portions of each of the site-isolated regions to a second dopant; firing the substrate in a second furnace step, wherein a portion of the second dopant diffuses into each of the site-isolated regions; and removing the photoresist mask.