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United States Patent Application

View the Complete Application at the US Patent & Trademark Office
The invention provides a novel fabrication method to produce solar cells using water-based inks that can be readily used in roll-to-roll processing, ink-jet printing and other large-scale fabrication processes. The invention also provides OPV devices with significantly improved efficiency. The invention offers a number of advantages over existing methods: (1) use of water dispersions instead of environmentally hazardous organic solvents, (2) use of semiconducting nanoparticles that allow control of the domain size and structure, (3) treatment of PEDOT:PSS using UV/Ozone allows film uniformity from aqueoue dispersions, (4) use of heat-IR radiation to make uniform films, (5) use of hole-blocking layer for increased fill factors (squareness of the I-V curve, the ratio between the maximum power obtained and the maximum power obtainable defined by the open circuit voltage and the short circuit current).
Venkataraman, Dhandapani (Amherst, MA), Bag, Monojit (Amherst, MA), Gehan, Timothy S. (Amherst, MA), Cutting, Christie Laurel (Enfield, MA)
15/ 301,365
April 24, 2015
GOVERNMENT RIGHTS [0003] The United States Government has certain rights to the invention pursuant to Grant No. DE-DC0001087 from Department of Energy to the University of Massachusetts.