Quantum dot solar power research. Researchers experimenting with quantum dots and photovoltaic cells. The quantum dot solutions in the foreground show intense photoluminescence when illuminated with ultraviolet (UV) light. This work is being carried out at in a laboratory at the Solar Energy Research Facility (SERF) at the National Renewable Energy Laboratory (NREL), Golden, Colorado, USA. The researchers here have set efficiency records for a quantum dot solar cell. Quantum dots are tiny nanoparticles that can be used to harness solar energy to produce electricity. Photographed in August 2017.