He has authored seven patents in fields ranging from electrophoretic displays found in e-readers to organic light emitting diodes (a new type of efficient lighting) to quantum dot solar cells. At Mount Holyoke, Arango has built the Next-Generation Solar Cell Fabrication Lab, which investigates solar cells that aim to be both highly efficient and less expensive. Arango holds a B.S. in physics from the University of California, Santa Cruz, and a Ph.D. in electrical engineering from MIT. He joined the faculty at Mount Holyoke in 2010.