Hanwha Q Cells consortium selected for state project to commercialize perovskite-silicon tandem solar cells

A consortium led by Hanwha Q Cells, a leading manufacturer of photovoltaic solar cells in South Korea, has been selected for a three-year state project to develop and commercialize perovskite crystalline silicon solar cells with high durability and high efficiency by using tandem cell technology that builds perovskite on top of silicon solar cells.

Tandem solar cells can be individual cells or connected in series, which are simpler to fabricate but the current is the same through each cell. Hanwha Q Cells said the consortium involving three private companies, two research bodies and three universities has signed an agreement with the state-run Korea Institute of Energy Technology Evaluation and Planning (KETEP) to develop module process technologies.

Templating approach stabilizes perovskite material

Researchers from the Diamond Light Source and the electron Physical Science Imaging Centre (ePSIC), Imperial College London, Yonsei University, Wageningen University and Research, and the University of Leeds have developed a method to stabilize perovskites without compromising their performance.

The researchers used an organic molecule as a ‘template’ to guide perovskite films into the desired phase as they form.

Perovskite solar cells show improved stability and renewable capability with the use of polyvinylpyrrolidone polymer

Researchers from the Hefei Institutes of Physical Science (HFIPS) under the Chinese Academy of Sciences (CAS), University of Science and Technology of China, North Minzu University, Hefei University of Technology, Greece's Institute of Nanoscience and Nanotechnology (INN) and Australia's Greatcell Energy have developed perovskite solar cells with a self-recovery capability and high stability in humid environment by introducing polymer called polyvinylpyrrolidone.

The team has shown that polyvinylpyrrolidone, a long chain insulating polymer, could form hydrogen bonds with ions in the cells and also prevent moisture in the air from invading perovskite materials. The hydrogen-bonding-initiated self-healing repairs the decayed perovskite solar cell back to the original state, continue to work, and alleviate long-term cell instability.

Researchers design a 20.9%-efficient perovskite solar device that retains 99% of initial efficiency after 1,450 hours

Researchers from Germany’s Forschungszentrum Jülich have developed a planar perovskite solar cell that reportedly reached over 1,400 hours of operational stability at elevated temperatures. The 20.9% efficient device was built without the ionic dopants or metal oxide nanoparticles that are commonly used to contact the cell, as these can be subject to secondary reactions at higher temperatures.

The scientists tested many different perovskite mixtures before choosing the perovskite material for the cell, giving great focus to their thermal stability, using a self-constructed, high-throughput screening platform.

Researchers use inkjet printing to produce a large range of photodetector devices based on a hybrid perovskite semiconductor

Researchers from Innovation Lab HySPRINT at Helmholtz-Zentrum Berlin (HZB) and Humboldt Universität zu Berlin (HU) have used an advanced inkjet printing technique to produce a large range of photodetector devices based on a hybrid perovskite semiconductor.

Combinatorial Inkjet Printing for Synthesis and Deposition of Metal Halide Perovskites image

By mixing three inks, the researchers were able to precisely tune the semiconductor properties during the printing process. Inkjet printing is already an established fabrication method, allowing fast and cheap solution processing. Extending the inkjet capabilities from large area coating towards combinatorial material synthesis could open the door to new possibilities for the fabrication of different kinds of electronic components in a single printing step.

Phosphorene nanoribbon-augmented perovskite solar cells show great promise

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".

Phosphorene Nanoribbon-Augmented Optoelectronics for Enhanced Hole Extraction image

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.

Researchers synthesize a previously theoretical nitride perovskite

Scientists at the National Renewable Energy Laboratory (NREL) have experimentally synthesized a nitride perovskite material that previously only existed in theory and measured its properties in collaboration with researchers at the Colorado School of Mines.

Synthesis of LaWN3 nitride perovskite with polar symmetry image

The new material could theoretically be used for microelectromechanical devices such as the ones used in telecommunications and other areas. Nitride perovskites have been computationally predicted to be stable, but not many have been synthesized, and their experimental properties remain largely unknown, the researchers explained in their new article.