Research

Salgenx has developed a way to produce graphene on demand from its saltwater flow battery. The tech exploits the electrochemical properties of the battery’s cathode to exfoliate graphite into individual layers of graphene. The company says it can produce graphene for less than $1.25 per gram, providing storage businesses with an additional revenue stream.

Low electrolyzer costs, low capex, a low levelized cost of energy, and a decent capacity factor are key to developing viable green hydrogen projects. George Touloupas, senior director of technology for Clean Energy Associates, tells pv magazine about the main challenges and the current price trajectory for green hydrogen tech.

TrendForce has ranked the top six module manufacturers by shipment volume in 2022, with Longi topping the list, followed by Trina Solar and JinkoSolar. JA Solar, Canadian Solar, and Risen Energy rounded out the top six, in a year dominated by large-format modules.

The European Solar Test Installation (ESTI) has confirmed the results of King Abdullah University of Science and Technology’s (KAUST) new perovskite/silicon tandem solar cell. KAUST researchers claim the tech is a step forward from other perovskite-silicon cells they have developed.

The Viperlab project is a European initiative that brings together organizations that are working on perovskite solar. pv magazine speaks with Eva Unger, Viperlab’s scientific coordinator, about the infrastructure needed to facilitate the transfer of information and technology to the industry, as well as the huge database that needs to be created to serve this purpose.

The China Academy of Metrology and Science has certified Jolywood’s 26.7% efficiency rating for an n-type tunnel oxide passivated contact (TOPCon) solar cell, which the company claims is a world record. In November 2022, it announced a 26.1% efficiency rating for a similar cell.

Japanese researchers have fabricated a heterojunction (HJT) solar cell with silicon and a polymer material known as PEDOT:PSS under room temperature conditions. It has an efficiency of 10.1%, an open-circuit voltage of 0.57 V, a short-circuit current density of 33.3 mA/cm2, and a fill factor of 0.53.

The US National Renewable Energy Laboratory (NREL) and First Solar have used cracked film lithography (CFL) to build a bifacial cadmium telluride solar cell with a power density of 20.3 mW cm−2. They claim the cell has a higher bifacial power density than any polycrystalline absorber currently manufactured at scale.

Finnish and German researchers have assessed the role of seasonal hydrogen storage for PV prosumer households with a “least-cost” model at a global level up to 2050. They have found that seasonal hydrogen storage can only be expected in a niche, off-grid market.

Scientists in Turkey have demonstrated that sepiolite, a naturally occurring clay substance, can be added to perovskite precursor materials, and form a scaffold layer that can improve the efficiency and stability of the cells. The scientists believe that this substance could be valuable in developing reproducible processes for the production of large-area perovskite solar cells.