Technology

Researchers at Germany’s Fraunhofer Institute for Integrated Systems and Device Technology IISB are trying to understand the causes of light and elevated temperature induced degradation (LeTID) in PERC solar cells. Initial investigations should provide a comprehensive understanding of the process and material dependency of LeTID and related degradation effects in monocrystalline and multicrystalline PERC solar cells.

Researchers from the Solar Energy Research Institute of Singapore have concluded that utility-scale PV projects relying on bifacial panels and single-axis trackers deliver the lowest levelized cost of energy in most of the world. They found that the combination of bifacial products with dual-axis trackers is still too expensive, despite the higher yield. The second-lowest LCOE is offered by monofacial single-axis tracker plants.

Researchers in Iran have applied the Stackelberg leadership model to determine whether the creation of a closed-loop solar module supply chain – including panel refurbishing – is feasible. According to their findings, a similar supply chain may only be set up with public subsidies, which would ensure that costs for R&D, module production, and recycling are distributed between the government and all the chain’s players.

Researchers in the U.S. have demonstrated, using simulations, PV system generation can range from 18-60% of clear-sky potential during hurricanes – provided the arrays do not suffer damage. According to them, solar installations could continue to provide back-up power when grids are down during hurricanes, especially if coupled with energy storage.

Researchers in Japan have modified the tin(IV) oxide layer of a perovskite device with a fullerene-derivative-based self-assembled monolayer to produce a cell they claim offers stability and a reduction in the hysteresis effect which makes predicting power output so tricky.

Researchers in China have sought to understand how soiling exacerbated by anti-reflective coatings might inhibit solar panel output. In terms of effectiveness against soiling, the scientists found hollow-silica-nanoparticle coatings did better than solid silica alternatives.

Scientists in India are seeking to mitigate partial shading with a technique based on the Lo Shu nine-square grid of ancient Chinese mathematical tradition. Their approach features the ‘magic grid’ also used in popular sudoku puzzles, as a guide for reconfiguring arrays.

Over the past two years, German renewables business Baywa re has developed in-house floating solar technology and installed nearly 50 MW of projects in the Netherlands. Benoît Roux, director of solar activities at Baywa re in France, said the ramp-up in project size has enabled the company to achieve dramatic cost reductions.

U.K. business Roof Tiles Technology Ltd has developed a solar tile with a claimed efficiency of 17.5% and power output of 175 W per square meter. The company’s founder, Antonio Lanzoni, said a PV system featuring the product would cost 25-30% more than a standard solar rooftop.

The French government has selected seven agrivoltaic projects with a total generation capacity of 12 MW in its latest tender for innovative PV technology.