Printing power

Researchers at the University of Toronto, Canada, have devised a method for printing perovskite solar cells. Perovskite solar cells can enable us to use techniques already established in the printing industry to produce solar cells at very low cost. Potentially, perovskites and silicon cells can be married to improve efficiency further, but only with advances in low-temperature processes," explains senior author on the research paper Ted Sargent. The approach developed by Hairen Tan and his team involves a new chemical reaction that enables them to grow an electron-selective layer made of nanoparticles in solution, directly on top of an electrode overcoming a major obstacle in fabricating such solar cells at relatively low processing temperatures.