Technology and R&D

The organic methylammonium (MA) molecules in the cell were replaced with inorganic elements such as rubidium and cesium. The planar perovskite cells resulting from the research have an efficiency of more than 20%.

Heterojunction and TOPcon cell technologies being explored by Hefei-based cell and module maker. The Chinese giant is also preparing to fly in the face of predictions the big players will curtail plans to expand production after this year’s policy developments in their homeland.

The inverter maker will buy 75% of Kokam’s shares for $88 million, with an intent to acquire the remainder shortly after, on the open market. Strategic company acquisitions and close partnerships are characterizing this year’s inverter market, as companies seek to diversify and integrate storage systems and other technologies.

Berkeley researchers have discovered a shade of blue – dating back to ancient Egypt – which has impressive qualities they say could reduce building energy consumption and boost solar energy output. Meanwhile, the US National Renewable Energy Laboratory has developed a perovskite cell material that could be applied to a substrate using a paintbrush.

Inorganic electrolytes will do the trick the company says. For multi-MW grid-scale applications the company says its technology can boost battery life to 50,000 cycles and is non-flammable. It adds that the costs of the product are competitive with conventional battery systems. Innolith is taking over the baton from Alevo, including chief executive and engineers. Alevo, however, went bankrupt last year, making the same promises.

TOPCon technologies could further increase solar cell efficiencies, said Guangyao Jin, chief scientist, DuPont Photovoltaic Solutions, at this year’s Energy Taiwan, held in September. He added that metallization paste is crucial.

Researchers from Berlin’s Helmholtz Zentrum Research Institute have developed a silicon heterojunction cell, with an additional crystalline layer that utilizes an effect known as singlet fission to boost efficiency. The team has created a device demonstrating that the principle works, and says that with further experimentation, the concept could achieve cell efficiencies as high as 40%.

pv magazine interviewed Ricardo Arias González, who holds a PhD in Physical Sciences and introduced the Optical Tweezers applied to biology in Spain. It is one of the tools of photonics for which Arthur Ashkin received the Nobel Prize in Physics in 2018, together with Donna Strickland and Gérard Mourou.

A team of researchers from the Okinawa Institute of Science and Technology (OIST) has developed a new process for the production of perovskite solar devices; and reports a 5x5cm² device with an efficiency above 15%. The researchers worked with a 1 micron thick active layer, considerably thicker than in many other perovskite devices, and state that this helped achieve better long-term stability.

At first glance, the European PV conference this week has confirmed the widespread view that the upswing of monocrystalline technology will accelerate. But a closer look reveals that multicrystalline solar cells are still in the game.