Technology and R&D

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.

Although the “solar flow battery” is currently considered too expensive by its own creators, a further improvement of its design and the use of emerging solar materials and new electrochemistry may open new opportunities for this kind of technology.

This means that this promising material, contrary to common belief, is able to form domains of polarized strain to minimize elastic energy. The research team made its discovery by using multimodal imaging.

The EU PVSEC conference, held this week in Brussels, was filled with bold announcements regarding solar’s trajectory in the coming years; and is backed up by a few announcements of new world records and impressive results from industry players and leading research institutes.

The Belgian research institute developed its cell in partnership with EnergyVille, Solliance and German research center, ZSW.

The solar company has launched a five-year research project with the British scientists, which has been funded with £2.5 million from the U.K. Government. The goal is to develop a thin film multi-junction perovskite solar cell with a 37% efficiency and long-term stability.