Solar energy uses various technologies to take advantage of the power of the sun to produce energy. Solar energy is one of the best renewable energy sources available because it is one the cleanest sources of energy. The Institute of Energy Conversion was established at the University of Delaware to perform research and development on thin-film photovoltaic and solar thermal systems, becoming the world’s first laboratory dedicated to photovoltaic research and development. The United States (US) Department of Energy launched the Solar Energy Research Institute, a federal facility dedicated to harnessing power from the sun. The solar field contained rows of mirrors that concentrated the sun’s energy onto a system of pipes circulating a heat-transfer fluid. The National Renewable Energy Laboratory completed construction of its Solar Energy Research Facility, which was recognized as the most energy-efficient of all US Linear Concentrating solar power collectors capture or collect the sun’s energy using long, rectangular, curved mirrors.