Tandem - Page 2

INES and 3SUN announce 29.8% efficiency record for a 9 cm² perovskite-on-silicon tandem cell

The close collaboration between researchers at France's National Solar Energy Institute (INES) – a division of the French Alternative Energies and Atomic Energy Commission (CEA) - and 3SUN has reportedly yielded a certified efficiency record for a perovskite-on-silicon tandem photovoltaic cell measuring 9 cm² after shading correction.

The team explained that most of the efficiency records published internationally relate to a surface area of 1 cm². They said that the surface is a real challenge that they are addressing in their developments. This result marks a new stage in the development of PIN-type 2-terminal tandem cells. The progress is evident, with 26.5% in March 2023, then 27.1% in June 2023, 28.4% in December 2023, 28.7% last June and now 29.8%, for devices showing a Voc greater than 1900 mV.

Read the full story Posted: Sep 03,2024

Flexell Space and Airbus team up to develop perovskite/CIGS tandem PV for space applications

Flexell Space, an in-house venture of Hanwha Systems, has announced that it has signed a letter of intent (LOI) with Airbus Defence and Space GmbH (Airbus) to develop next-generation space solar cell modules using perovskite/CIGS tandem solar cell technology. This collaboration aims to revolutionize the efficiency and weight of space solar cells, marking a significant milestone in the aerospace industry.

Through this agreement, Flexell Space and Airbus plan to design and develop space solar cell modules that are more than half the weight of existing models while maintaining performance and efficiency. By applying Flexell Space's tandem solar cell technology, the new solar cells will aim to offer low cost, high efficiency, rapid production, and flexibility.

Read the full story Posted: Aug 26,2024

Hanwha Q CELLS to focus on rapid commercialization of tandem PSCs

Hanwha Q CELLS, according to BusinessKorea, is shifting its strategy from research and development to rapid commercialization in the field of tandem solar cells. This strategic pivot comes, as was reported, as Chinese companies invest heavily in improving tandem energy efficiency.

Hanwha Q CELLS is reportedly set to complete the final inspection of its 40MW perovskite-tandem cell pilot line in Jincheon, Chungbuk, as early as October this year and begin trial operations. The company aims to start commercial production by 2026, believing that entering mass production ahead of China is crucial to gaining the upper hand in the market.

Read the full story Posted: Aug 20,2024

Researchers use diamine chelates to increase stability in mixed Sn–Pb and all-perovskite tandem solar cells

An international team of researchers, including ones from the University of Toronto, University of Toledo, Northwestern University, Lawrence Berkeley National Laboratory, KAUST and more, recently developed an all-perovskite tandem device that is said to show reduced recombination losses in the cell’s bottom device and excellent stability.

Image credit: Northwestern University
 

To improve the perovskite solar cell’s surface, the scientists created partially non-conductive and non-functional areas that protect the perovskite area underneath from becoming defective. The team examined the addition of diamine to improve the perovskite solar cell’s surface. The scientists found that the process made the surface more stable and improved the overall performance, resulting in a power conversion efficiency of 27.4% with better stability.

Read the full story Posted: Aug 18,2024

A novel binary 2D perovskite passivation approach enables efficient and stable perovskite/silicon tandem solar cells

Researchers from China's Beijing Institute of Technology, Peking University, Central South University, Jiangnan University and Auner Technology have developed a unique binary 2D perovskite passivation approach and used it to fabricate a monolithic perovskite/silicon tandem solar cell with a steady-state efficiency of 30.65% (reportedly assessed by a third party). 

Schematic of the monolithic tandem structure based on a double-side textured silicon heterojunction cell. Image credit: Nature Communications

The tandem devices also retained 96% of their initial efficiency after 527 h of operation under full spectral continuous illumination, and 98% after 1000 h of damp-heat testing (85 °C with 85% relative humidity).

Read the full story Posted: Aug 18,2024

Researchers use hybrid interconnecting layers to achieve perovskite-silicon tandem solar cell with 28.47% efficiency

Researchers from China's Jinan University, University of Macau, Wuyi University, Guangdong Mellow Energy and Germany's IEK-5 Photovoltaik (Forschungszentrum Jülich) recently designed a two-terminal perovskite-silicon tandem solar cell that utilizes new hybrid interconnecting layers to reduce recombination losses in the top perovskite device. The tandem cell achieved an impressive fill factor of 81.8%, which the scientists said is the highest value ever reported for this cell technology to date.

The team's 2T perovskite-silicon tandem solar cell is based on special hybrid interconnecting layers (ICLs) that prevent direct contact between the perovskite absorber and transparent conductive oxide (TCO). The scientists' approach is based on sputtered nickel oxide (NiOx) as the seed layer of SAMs to build the hybrid interconnecting layers. The sputtered treatment technique provides, according to the team, an easy coating on a complex substrate and high reproducibility.

Read the full story Posted: Aug 12,2024

SolaEon claims 21.95% efficiency of monolithic perovskite tandem solar cells

SolaEon Technology, a Chinese solar manufacturer, claims that it has achieved a record conversion efficiency of 21.95% on 300mm x 400mm monolithic perovskite tandem solar cells for MPPT.

In October 2023, SolaEon claimed its 1,200 sq. cm. perovskite single-junction solar cell module achieved a 3rd party certified efficiency of 21.63%. In April 2024, SolaEon said its perovskite solar cell module achieved a steady state efficiency of 19.2% based on 1,027.1 c㎡ area. In May 2024, it reportedly achieved a world record conversion efficiency of 29.34% for monolithic full perovskite tandem solar cells. 

Read the full story Posted: Aug 09,2024

China's GCL to invest USD$98 million in tandem silicon/perovskite PV

GCL Technology, one of China’s largest solar panel materials producers, will reportedly invest 700 million yuan (almost USD$98 million) to transition to a more lucrative next-generation technology, as the industry grapples with losses and oversupply.

The Hong Kong-listed company aims to complete the first phase of a 500 megawatt (MW) plant in Kunshan by the middle of next year, for solar modules that combine cells stacked with perovskite and crystalline silicon, according to a statement by Fan Bin, chairman of GCL Perovskite. “The value of the [nascent] perovskite technology lies in the ample room for uplifting its energy conversion efficiency,” he said. “That is why manufacturers are willing to invest in its development.” The future cost of production using the perovskite-silicon technology could be lower than the crystalline silicon technology, he added.

Read the full story Posted: Aug 08,2024

Researchers attempt to achieve efficient silicon/perovskite tandem solar cells with a unique additive to the perovskite precursor solution

Researchers from King Abdullah University of Science and Technology (KAUST) and Marmara University set out to minimize crystal defects and film inhomogeneities in perovskite top cells, to achieve the full potential of monolithic perovskite/silicon tandem solar cells. 

In their recent work, the scientists discuss the use of methylenediammonium dichloride as an additive to the perovskite precursor solution, resulting in the incorporation of in situ–formed tetrahydrotriazinium (THTZ-H+) into the perovskite lattice upon film crystallization. 

Read the full story Posted: Aug 05,2024

Researchers develop method for more stable all-perovskite tandem solar cells

Researchers at The University of Toledo (UToledo), Northwestern University and University of Washington have focused on the stability of perovskite solar cells, and reported an adjustment to the chemical structure of a key component of a tandem cell that allows it to continuously generate electricity for more than 1,000 hours.

Image from Joule

“State-of-the-art all-perovskite tandem cells with a conventional hole-transfer layer can only continuously operate for hundreds of hours,” said Dr. Zhaoning Song, a co-author and assistant professor in the Department of Physics and Astronomy at UToledo. “Our innovation prolongs the stability of these devices, advancing all-perovskite tandem technology and bringing it closer to practical application.”

Read the full story Posted: Jul 16,2024