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Search results for “perovskite”

Thermodynamic model to build more-stable perovskite solar cells

Dutch scientists claim to have developed a theory that explains the mechanisms behind halide segregation, which is the main factor affecting thermal stability in perovskite solar cells. They affirmed that the theory may provide technical solutions to build more stable perovskite PV devices.

Perovskites stick together for better performance

Scientists in the U.S. demonstrated an additive that acts as a “molecular glue” within a perovskite solar cell. Treating the cells with this self-assembled monolayer material was shown to greatly improve their long-term performance, whilst also providing a boost to conversion efficiency. And the scientists further point out that the treatment relies on simple processing and readily available materials – good signs for its applicability in manufacturing.

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Inverted perovskite solar cell with 22.8% efficiency

The cell features an open-circuit voltage of 1.1 V and a short-circuit current of 26 milliampere per cm-2, which the research team described as the best performance for an inverted perovskite cell based on single-crystal methylammonium lead triiodide. The device was built with a microns-thick absorber layer placed between an electron transport top layer and a hole-transport bottom layer.

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16.63%-efficient perovskite PV module via slot-die coating

Scientists in China have developed a large-area perovskite solar panel by utilizing diphenyl sulfoxide (DPSO) as an electron acceptor. The device was fabricated via slot-die coating, and featured a parallel-interconnection architecture.

Pure perovskites in play

Companies working to bring perovskite cell technology to commercial viability face a dilemma: Should perovskites complement their silicon-based rivals or compete head-on with the dominant cell technology? For one U.S. perovskite developer, it believes the technology must find a space of its own, reports David Wagman, senior editor of pv magazine USA.

A different angle on perovskite defects

Scientists in China took a closer look at the role of defects in limiting the performance of perovskite solar cells, demonstrating a screening effect that could be tuned to make material defects “invisible” to charge carriers, greatly improving cell performance. Using this approach they demonstrate a 22% efficient inverted perovskite solar cell, and theorize several new pathways to even higher performance.

Keeping track of hydrogen for perovskite performance

Scientists in the United States discovered that hydrogen plays a leading role in the formation of defects in a perovskite film, which limit their performance as PV devices. The discovery, according to the researchers, offers further insight into observations already established by trial and error and could help to push the impressive efficiency achievements already made by perovskites even higher.

Large-area perovskite solar module with 18% efficiency

Researchers in Germany claim to have overcome the main challenge for the development of large-area perovskite PV modules – scaling up from the cell to the module level. They achieved an efficiency of up to 16.6% on a module surface of ​​more than 50 centimeters squared, and 18% on a module with an area of 4 centimeters squared.

Doping and capping promise perovskite stability

Scientists demonstrated two new approaches to improving the stability of perovskite solar cells. By both incorporating rubidium into the structure of the perovskite, and adding a film of two-dimensional perovskite as a capping layer, they were able to demonstrate a significant reduction in the cell’s sensitivity to moisture. The group says its research will open up new routes to improved performance and stability in perovskite PV.

Solliance hits 28.7% efficiency on perovskite/silicon tandem solar cell

The Dutch consortium has achieved the record result by combining, in a four-terminal tandem configuration, an 18.6% efficient highly near-infrared transparent perovskite with a prototype of a c-Si interdigitated back contact (IBC) silicon heteroJunction (SHJ) cell developed by Japanese electronics manufacturer Panasonic. The perovskite cell was also combined with other kinds of solar cells and other remarkable record efficiencies were hit.

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