The Solar Energy Technologies Office Fiscal Year 2018 (SETO FY2018) funding program addresses the affordability, flexibility, and performance of solar technologies. This program funds early-stage research projects that advance both solar photovoltaic (PV) and concentrating solar-thermal power (CSP) technologies.

Earlier this month, the U.S. Department of Energy announced it would provide $53 million in funding for 53 projects in the SETO FY2018 funding program. Of those projects, 31 will focus on photovoltaics research and development. Within this topic, the office has also selected projects that will develop and test new ways to accelerate the integration of emerging technologies into the solar industry.

Researchers from the National University of Singapore (NUS) have developed novel lead halide perovskite nanocrystals that are highly sensitive to X-ray irradiation. By incorporating these nanocrystals into flat-panel X-ray imagers, the team developed a new type of detector that could sense X-rays at a radiation dose about 400 times lower than the standard dose used in current medical diagnostics. These nanocrystals are also cheaper than the inorganic crystals used in conventional X-ray imaging machines.

"Our technology uses a much lower radiation dose to deliver higher resolution images, and it can also be used for rapid, real-time X-ray imaging. It shows great promise in revolutionizing imaging technology for the medical and electronics industries. For patients, this means lower cost of X-ray imaging and less radiation risk," said the research team.

Researchers at Helmholtz-Zentrum Berlin (HZB) have demonstrated 25.5% efficiency for monolithic perovskite/silicon tandem solar cells using textured foil. In addition, the impact of texture position on performance and energy yield is simulated in their new work.

Tandem solar cell device schematics of the experimentally realized architecture and SEM cross section image of the top cell

The research team used a textured light management (LM) foil on the front-side of a tandem solar cell processed on a wafer with planar front-side and textured back-side. Consequently, the PCE of monolithic, 2-terminal perovskite/silicon-heterojunction tandem solar cells was improved from 23.4% to 25.5%. This approach replaced the use of textured silicon wafers, that can be utilized for light management but are typically not compatible with perovskite solution processing.