Modules & Upstream Manufacturing

Australian scientists have built a perovskite solar cell based on 2D and 3D salts. By adding a fluorinated lead salt in the processing solution – normally used to form 3D methylammonium lead iodide – they were able to achieve a 21.1% efficiency, an open-circuit voltage of 1.12 V, a short-circuit current of 22.4 mA/cm2, and a fill factor of 84%.

The PV module relies on Jinko’s TOPCon mono cell technology, for which a record efficiency of 24.9% was announced last week. TÜV Rheinland has confirmed the result.

Separating backsheets from solar PV modules is one of the most challenging issues for module recycling, because of the glues involved. Given the difficulties in pulling apart the layers, which are typically made of virgin plastic, they are usually burned. However, there are some industry players taking steps to improve the design, recyclability and reusability of backsheets. One of them is Italy-based Coveme, which recently partnered with pv magazine’s UP Initiative. In the following interview, CEO Amedeo Maccolini explains what the company is doing to step UP its sustainability game.

Researchers in the Netherlands and Singapore have measured irradiance-weighted average temperatures of floating PV systems in both countries and have compared the results with reference rooftop and ground-mounted PV systems. They have discovered that floating PV systems with open structures, which allow wind to pass beneath the modules, can provide a higher heat loss coefficient.

Italian researchers have engineered a hole extraction layer with water-splitting additives to reduce the impact of moisture in perovskite PV devices. They claim that the method ensured a power conversion efficiency of more than 9% in perovskite cells stored for a month in a water-saturated atmosphere.

Trina Solar has secured a 4 GW solar module order from US company Nextera Energy and wafer manufacturer JYT Corporation closed deals to supply a total of 1,906,000,000 wafers.

The US module maker plans to start shutting down production in Hillsboro in March. Around 170 employees are affected by the closure. At the same time, however, Sunpower is examining other options for continued operation.

A Slovenian research team has analyzed the behavior of a full-size cell PV module and several 1/6 cell panels under partial shading and has come to the obvious conclusion that the cell cut panels suffer fewer energy losses. They also found, however, that the orientation of the cells connected in series should be aligned as much as possible with the shade shape to lower the losses and to minimize reverse cell voltage.

A new paper from scientists in China and Canada examines the recent progress in the development of perovskite-silicon tandem cells, finding a technology that’s poised for rapid commercialization, with a few research challenges still to overcome. These are primarily related to ensuring the perovskite layer can match the lifetime of the silicon cell underneath.

Researchers in Saudi Arabia claim to have increased the efficiency of organic PV devices with diquat, a compound used in herbicide. The molecular diquat dopant increased optical absorption and the lifetime of electrical charges when light was absorbed.