Solar Energy Research Institute

Solar Energy Research Institute
Name	Solar Energy Research Institute
Established	1977
Focus	Photovoltaics, concentrated solar power, solar thermal energy, grid integration
Location	Golden, Colorado, United States

Solar Energy Research Institute. Established in the wake of the 1973 oil crisis, it was founded by an act of the United States Congress to advance the nation's capabilities in renewable energy. Initially part of the Energy Research and Development Administration, it was later incorporated into the newly formed United States Department of Energy. The institute's creation marked a significant federal commitment to developing solar power as a viable alternative to fossil fuels.

History and establishment

The institute was formally established in 1977, a direct legislative response to global energy insecurity highlighted by the OPEC embargo. Its first director, Denis Hayes, a prominent environmental advocate known for founding Earth Day, helped shape its early mission. The site in Golden, Colorado was selected for its proximity to the National Renewable Energy Laboratory and other scientific resources like the Colorado School of Mines. Early years were defined by foundational work in crystalline silicon technologies and establishing collaborative ties with institutions such as the Massachusetts Institute of Technology and Stanford University.

Research focus and programs

Core research is organized into several key divisions, primarily focusing on next-generation photovoltaics including perovskite solar cells, cadmium telluride, and copper indium gallium selenide technologies. The concentrated solar power program develops advanced heat transfer fluids and thermal energy storage systems for plants like Ivanpah Solar Power Facility. Additional major programs include grid integration studies to manage variable renewable input, solar fuels research aiming to produce hydrogen via photoelectrochemical processes, and building technologies integrating photovoltaic systems with structures. Work on doping processes and anti-reflective coatings for solar panels is also extensive.

Key facilities and infrastructure

The campus houses the renowned Solar Energy Research Facility, which contains multiple class 1000 cleanroom spaces for semiconductor processing. The National Center for Photovoltaics provides testing and validation for emerging cell designs. For concentrated solar power research, the institute operates a high-flux solar simulator and the Thermal Test Facility. Outdoor testing is conducted at the Solar Radiation Research Laboratory, which maintains precise pyranometer and pyrheliometer calibration. The Energy Systems Integration Facility allows for full-scale testing of inverters and microgrid configurations with utilities like Xcel Energy.

Major achievements and discoveries

Researchers achieved a world record for solar cell efficiency with a multi-junction solar cell under the AM0 spectrum, critical for spacecraft power systems. The institute pioneered the commercial development of cadmium telluride thin-film modules, a technology later advanced by companies like First Solar. Its scientists made foundational contributions to the understanding of light-induced degradation in silicon substrates, known as the Staebler–Wronski effect. Work on transparent conductive oxides led to improved indium tin oxide films used globally. The institute's models for solar resource assessment are the standard used by the National Weather Service and projects like the Solar Energy Generating Systems.

Collaborations and partnerships

The institute maintains a robust partnership with the National Renewable Energy Laboratory, often co-hosting the annual Solar Power International conference. It leads the SunShot Initiative, collaborating with Sandia National Laboratories and Lawrence Berkeley National Laboratory. International partnerships include joint research with the Fraunhofer Society in Germany and the National Institute of Advanced Industrial Science and Technology in Japan. It works closely with industry through the Solar Energy Industries Association and has funded research agreements with corporations such as Tesla, SunPower, and General Electric. University consortia include the Stanford Global Climate and Energy Project and the University of Delaware's Institute of Energy Conversion.

Future directions and challenges

Current strategic priorities include driving down the levelized cost of energy for photovoltaics to targets set by the United States Department of Energy. A major initiative is the development of tandem solar cells combining perovskite and silicon layers. Research into agrivoltaics explores dual-use land for solar generation and agriculture. Key challenges involve scaling up perovskite solar cell manufacturing and solving long-term stability issues, as well as securing supply chains for critical materials like tellurium and indium. The institute also focuses on recycling and end-of-life management for solar panels and enhancing cybersecurity for smart grid technologies integrated with solar power.

Category:Research institutes Category:Energy research