U.S. Naval Research Laboratory (NRL) research scientists and
engineers in the Electronics Science and Technology Division have demonstrated
the highest recorded open-circuit voltages for quantum dot solar cells to date.
Using colloidal lead sulfide (PbS) nanocrystal quantum dot (QD) substances,
researchers achieved an open-circuit voltage (VOC) of 692 millivolts (mV) using
the QD bandgap of a 1.4 electron volt (eV) in QD solar cell under one-sun
illumination.