Perovskite Solar - Page 69

Researchers from the Imperial College of London and University College London have demonstrated the photovoltaic-boosting effect that phosphorene nanoribbons (PNRs) can bring to perovskite solar cells. When applied in tandem with a perovskite solar cell, PNR-boosted cells achieved an efficiency above 21%, which the researchers defined as "on par with traditional silicon cell output levels".

PNRs, first produced in 2019, have many theoretical use cases, including enhancing batteries, biomedical sensors, and quantum computing. The PNRs directly aided the perovskite cells' hole mobility, improving overall efficiency.

Uppsala University spinoff Evolar has entered into a joint development project with an undisclosed Indian silicon solar module manufacturer to develop highly efficient perovskite/silicon tandem solar modules for the South Asian market.

'Evolar is developing a unique perovskite-based PV power booster technology that adds 25 percent power to conventional solar panels. Moreover, it is easy to integrate the perovskite thin film process into current production set-ups. We firmly believe that the combination of our perovskite-based technology and this manufacturing partnership, can play a key role in strengthening India's domestic solar module supply,' says Mats Ljunggren, CEO of Evolar AB.

Researchers from Queen Mary University of London, in collaboration with an international team of scientists, developed a new process for creating FAPbI₃.

One of the challenges with making FAPbI₃ is that the high temperatures (150°C) used can cause the crystals within the material to 'stretch', making them strained, which favors the yellow phase that isn't suitable for solar cells. While previous reports have used small amounts of additional chemicals/additives to help form FAPbI₃ under these conditions, it can be very hard to control the uniformity and amounts of these additives when making solar cells at a very large scale, and the long-term impact of including them is not yet known.

Researchers from the Femtosecond Spectroscopy Unit, led by Professor Keshav Dani, at the Okinawa Institute of Science and Technology Graduate University (OIST) and Optoelectronics Materials and Device Spectroscopy Group, led by Dr. Sam Stranks at the University of Cambridge, have identified three different kinds of defect clusters in perovskite thin films, which likely occur during fabrication and may impede efficiency of perovskite solar cells.

The perovskite material lies at the heart of the solar cell, which consists of many different layers. When the sun hits the solar cell, its energy is absorbed by the perovskite, causing electrons to jump into a higher energy level and leaving holes behind. All the electrons then move in one direction through the layers of the solar cell to the electrical contact and the holes, in the other direction, thus generating a current.

Canada-based solar energy startup Solaires Enterprises Inc. has launched a new perovskite-based photovoltaic ink, with over four month shelf life and ability to air process in ambient conditions and generate high energy conversion efficiency in solar panels.

Chief Development Officer of Solaires Enterprises Inc., Ernest Daddey, stated: 'We have developed a solution that will enable innovative solar energy applications to revolutionize solar energy harvesting. We are currently in advanced discussions with key partners for this product as they are interested in Solaires' vitally important work in accelerating our transition to a low-carbon economy'.

Researchers from Kyung Hee University and Ulsan National Institute of Science and Technology (UNIST) in Korea have used cholesteric reflective screens, which were influenced by the skin of a beetle, to produce efficient and opaque perovskite solar cells. Unlike metal and oxide-based reflection screens, cholesteric reflective filters (ChRFs) are entirely composed of organic compounds and are much easier to design and implement.

For use in colored perovskite solar cells (PSCs), two distinct kinds of ChRFs were produced, each with a distinct cross-linking pattern (monolayer or bilayer). Since the color of the ChRFs varies depending on the angle of view, they can be utilized to make colored PSCs. As the reflective screens were created using only organic components and wet procedures, they can be used to build large and adaptable PSCs without the need for expensive suction methods.

A research team led by Erkan Aydin and Stefaan De Wolf from the KAUST Solar Center, along with co-authors from Turkey, the Netherlands and Spain, has presented an overview on the process of stopping damage from occurring to devices during the creation of transparent electrodes, particularly for a technique known as sputtering.

Damage from adding electrical contacts to sensitive semiconductors, including perovskites, can be mitigated using a buffer layer and optimized deposition. The new review gives a comprehensive overview for the origin and mitigation strategies for this technological problem.

In a joint collaborative effort between the University of Pavia in Italy and the Technische Universität Dresden in Germany, researchers have developed a novel method to significantly improve the efficiency of inverted architecture perovskite solar cells.

The method is based on a modification of the interfaces of the perovskite active layer by introducing small amounts of organic halide salts at both the bottom and the top of the perovskite layer. Such organic halide salts, typically used for the formation of two-dimensional perovskites, led to the suppression of microstructural flaws and passivation of the defects of the perovskite layer. Using this approach, the team has achieved a power conversion efficiency of 23.7%, which they say is the highest reported to date for an inverted architecture perovskite solar cell.

Researchers at Nankai University in China have developed a Dion-Jacobson (DJ) two-dimensional perovskite solar cell. They claim it exhibits a power conversion efficiency of 18.82%, as well as remarkable light, thermal, environmental, and operational stability.

Two-dimensional (2D) Dion-Jacobson (DJ) phase perovskites have sparked interest in the scientific community due to their stability against harsh environmental conditions and their competitive performance in optoelectronic applications. Solar cells based on DJ perovskites, however, tend to show comparatively poor performance compared to their 3D counterparts.

Researchers at the National Renewable Energy Laboratory (NREL), along with collaborators from the SLAC National Accelerator Laboratory, University of Toledo, Princeton University, University of Arizona, University of Kentucky, and University of Colorado, have found away to improve the efficiency of perovskite solar cells by as much as 16%.

The effort involved combining a two-dimensional (2D) perovskite layer with a three-dimensional (3D) perovskite layer, which yielded a solar cell with improvements in both efficiency and stability.