US Patent 8038909 - Nanoparticle solution for fabrication of photovoltaic cell

http://www.freepatentsonline.com/8038909.html

This is the latest patent from NanoSolar teaching forming one of their nanoparticle solutions for printing solar cells on flexible and less expensive substrates. Claim 1 reads:

1. A method for fabricating a liquid containing intermixed elements of groups IB and IIIA, and VIA, comprising the steps of:

forming non-oxide nanoparticles containing elements from group IB; IIIA; and VIA;

combining the non-oxide nanoparticles to form a liquid that serves as an ink,

wherein forming the non-oxide nanoparticles includes spray co-precipitation of two or more reactants.