Boeing's Spectrolab subsidiary has been working on making solar cells more and more efficient for years now, and it looks like it's now set to put its latest record-breaking cells into mass production. Those come in the form of the company's new C3MJ+ solar cells, which boast an average conversion efficiency of 39.2 percent, making them the most efficient mass produced cells to date. What's more, Spectrolab says that since the new cells are so similar to its current C3MJ production cells, it should be relatively easy for cust
