Solar Energy

Air Force awards UToledo $12.5 million to develop space-based solar energy sheets

Published

4 years ago

February 17, 2021

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Air Force awards UToledo .5 million to develop space-based solar energy sheets

The military is adding fuel to the momentum of physicists at The University of Toledo who are advancing new frontiers in thin-film, highly efficient, low-cost photovoltaic technology to ensure a clean energy future.

The U.S. Air Force awarded UToledo $12.5 million to develop photovoltaic energy sheets that would live in space and harvest solar energy to transmit power wirelessly to Earth-based receivers or to other orbital or aerial instrumentation, such as communications satellites.

UToledo physicists will develop flexible solar cell sheets, each roughly the size of a piece of paper, that can be assembled and interconnected into much larger structures.

Although UToledo’s focus does not include engineering the interconnected arrays, the vision is potentially massive: one space-based solar array could include tens of millions of sheets and extend to sizes as large as a square mile – that’s more than three quarters the size of UToledo Main Campus. One array at this size could generate about 800 megawatts of electrical power – just shy of the power produced by the Davis Besse power plant between Toledo and Cleveland.

“”With 37% stronger sunlight above the atmosphere than on a typical sunny day here on Earth’s surface, orbital solar arrays offer a critical opportunity to harness renewable energy, achieve sustainability goals and provide strategic power for a wide range of orbital and airborne technologies,” said Dr. Randall Ellingson, professor in the UToledo Department of Physics and Astronomy and member of the UToledo Wright Center for Photovoltaics Innovation and Commercialization who will lead the five-year project.

“”This $12.5 million award recognizes our own University of Toledo as a national leader in solar cell technologies and in photovoltaic energy research,” said Congresswoman Marcy Kaptur. “UToledo’s broad partnerships with industry, government and academia represent the best of us and will help cement our region as a player for generations to come in solar manufacturing, research and development.”

Building on UToledo’s more than 30-year history advancing solar technology to power the world using clean energy, the physicists will continue developing the material science and photovoltaic technologies that are highly efficient, lightweight and durable in an outer-space environment.

They’re building tandem solar cells – two different solar cells stacked on top of each other that more efficiently harvest the sun’s spectrum – on very thin, flexible supporting materials.

“”We have had great success accelerating the performance of solar cells and drawing record levels of power from the same amount of sunlight using the tandem technique with what are called perovskites,” Ellingson said.

Perovskites are compound materials with a special crystal structure formed through chemistry.

The team will sandwich a variety of combinations of solar cells, including perovskites, silicon, cadmium telluride and copper indium gallium selenide, to raise the ceiling on what is achievable.

At the same time, the team will explore lightweight, flexible supporting material to create the large solar cell sheets. Those materials also need to be resilient, ultra-thin and tolerant to high and low temperatures. Semitransparent and very thin ceramic, plastics and glass are under consideration.

“Professor Ellingson and his team have demonstrated their ability to provide the Air Force with outstanding results over the years and the University is pleased that Representative Kaptur prioritizes projects that both advance the nation’s leadership in cutting-edge solar energy technology and provide the Department of Defense with the highest level of support from University research,” said Dr. Frank Calzonetti, UToledo vice president of research.

In 2019 the U.S. Air Force awarded Ellingson’s team $7.4 million to develop solar technology to power space vehicles using sunlight.

“”The Air Force has demanding specifications for its spaced-based power systems, and the advances being made in thin-film photovoltaics at UToledo coupled with our new photovoltaic sheets concept provide an avenue to meet them,” said Dr. Michael Heben, UToledo professor of physics and McMaster endowed chair. “The faculty and staff at UToledo’s Wright Center for Photovoltaics are proud to receive this award and excited about the challenge.”

In 2019 the U.S. Department of Energy awarded UToledo $4.5 million to develop the next-generation solar panel by bringing a new, ultra-high efficiency material to the consumer market. As part of the project, Dr. Yanfa Yan, UToledo professor of physics, is working with the National Renewable Energy Laboratory and First Solar to develop industrially relevant methods for both the fabrication and performance prediction of low-cost, efficient and stable perovskite thin-film PV modules.

Also in 2019 UToledo was part of a $3.9 million award led by Colorado State University to collaborate with the National Renewable Energy Laboratory, First Solar and the University of Illinois at Chicago on a U.S. Department of Energy-funded project to improve the voltage and power produced by cadmium-telluride-based solar cells.

UToledo’s Wright Center for Photovoltaics Innovation and Commercialization is a founding member of an organization called the U.S. Manufacturing of Advanced Perovskites Consortium, which is focused on moving a breakthrough new technology out of the lab and into the marketplace to enhance economic and national security. Partners include the U.S. Department of Energy’s National Renewable Energy Laboratory in Golden, Colo.; Washington Clean Energy Testbeds at the University of Washington; University of North Carolina at Chapel Hill; and six domestic companies that are working to commercialize the technology.

The University created the Wright Center for Photovoltaics Innovation and Commercialization in January 2007 with an $18.6 million award from the Ohio Department of Development in response to a proposal led by Dr. Robert Collins, Distinguished University Professor and NEG Endowed Chair of Silicate and Materials Science. Matching contributions of $30 million from federal agencies, universities and industrial partners helped to launch the center, which works to strengthen the photovoltaics and manufacturing base in Ohio through materials and design innovation.

“Solar electricity now competes economically with fossil-fueled and nuclear electricity while avoiding significant atmospheric carbon emissions which drive climate change,” Ellingson said.

“UToledo has assisted in driving down the cost of solar,” Heben said. “Over the past 15 years the cost of solar has been reduced by a factor of 10, while the amount of solar annually deployed has grown by a factor of 100, currently amounting to about 2% of the U.S. electricity supply. Importantly, the transition to clean solar electricity that is occurring also is creating tremendous new job growth opportunities in many parts of our economy.”

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Solar Energy

A single molecule elevates solar module output and stability

Published

1 day ago

April 24, 2025

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A single molecule elevates solar module output and stability

by Sophie Jenkins

London, UK (SPX) Apr 24, 2025

A new molecule developed through international collaboration has been shown to significantly improve both the performance and durability of perovskite solar cells, according to a recent study published in *Science*. The discovery centers on a synthetic ionic salt named CPMAC, which originates from buckminsterfullerene (C60) and has been shown to outperform traditional C60 in solar applications.

Researchers from the King Abdullah University of Science and Technology (KAUST) played a key role in the development of CPMAC. While C60 has long been used in perovskite solar cells due to its favorable electronic properties, it suffers from stability issues caused by weak van der Waals interactions at the interface with the perovskite layer. CPMAC was engineered to address these shortcomings.

“For over a decade, C60 has been an integral component in the development of perovskite solar cells. However, weak interactions at the perovskite/C60 interface lead to mechanical degradation that compromises long-term solar cell stability. To address this limitation, we designed a C60-derived ionic salt, CPMAC, to significantly enhance the stability of the perovskite solar cells,” explained Professor Osman Bakr, Executive Faculty of the KAUST Center of Excellence for Renewable Energy and Sustainable Technologies (CREST).

Unlike C60, CPMAC forms ionic bonds with the perovskite material, strengthening the electron transfer layer and thereby enhancing both structural stability and energy output. Cells incorporating CPMAC demonstrated a 0.6% improvement in power conversion efficiency (PCE) compared to those using C60.

Though the gain in efficiency appears modest, the impact scales up dramatically in real-world energy production. “When we deal with the scale of a typical power station, the additional electricity generated even from a fraction of a percentage point is quite significant,” said Hongwei Zhu, a research scientist at KAUST.

Beyond efficiency gains, CPMAC also enhanced device longevity. Under accelerated aging tests involving high heat and humidity over 2,000 hours, solar cells containing CPMAC retained a significantly higher portion of their efficiency. Specifically, their degradation was one third that observed in cells using conventional C60.

Further performance evaluation involved assembling the cells into four-cell modules, offering a closer approximation to commercial-scale solar panels. These tests reinforced the molecule’s advantage in both durability and output.

The key to CPMAC’s success lies in its capacity to reduce defects within the electron transfer layer, thanks to the formation of robust ionic bonds. This approach circumvents the limitations posed by van der Waals forces typical of unmodified C60 structures.

Research Report:C60-based ionic salt electron shuttle for high-performance inverted perovskite solar modules

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Solar Energy

Indonesia says China’s Huayou to replace LGES in EV battery project

Published

2 days ago

April 24, 2025

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Indonesia says China’s Huayou to replace LGES in EV battery project

by AFP Staff Writers

Jakarta (AFP) April 23, 2025

China’s Zhejiang Huayou Cobalt is replacing South Korea’s LG Energy Solution as a strategic investor in a multibillion-dollar project to build an electric vehicle battery joint venture in Indonesia, officials said on Wednesday.

The South Korean company, which was part of a consortium that signed a 142 trillion rupiah ($8.4 billion) “Grand Project” in 2020, announced its withdrawal from the project this week, citing factors including market conditions and the investment environment.

Energy and Mineral Resources Minister Bahlil Lahadalia said LG Energy Solution’s decision would not significantly affect the project, which aims to establish a local electric vehicle battery value chain in Indonesia.

“Changes only occur at the investor level, where LG no longer continue its involvement… and has been replaced by a strategic partner from China, namely Huayou,” Bahlil said in a statement.

“Nothing has changed from the initial goal, namely making Indonesia as the center of the world’s electric vehicle industry.”

Indonesia, home to the world’s largest nickel reserve, has been seeking to position itself as a key player in the global electric vehicle supply chain by leveraging its vast reserve of the critical mineral to attract investments.

The government decided not to move forward with the South Korean company in the project due to the long negotiation process with the firm to realise its investment, Investment Minister Rosan Roeslani said.

Rosan cited Huayou’s familiarity with Indonesia as one of the reasons why the government chose the company to succeed LG Energy Solution.

“Huayou had invested in Indonesia,” Rosan said.

“They have sources to develop the industry going forward.”

LG Energy Solution said in a statement on Tuesday that it will continue to explore “various avenues of collaboration” with the Indonesian government, including in its battery joint venture.

HLI Green Power, a joint venture between LG Energy Solution and Hyundai Motor Group, operates Indonesia’s first electric vehicle battery plant, which was launched in 2024 with a production capacity of up to 10 Gigawatt hours (GWh) of cells annually.

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Solar Energy

Politecnico di Milano explores global potential of agrivoltaics for land use harmony

Published

3 days ago

April 23, 2025

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Politecnico di Milano explores global potential of agrivoltaics for land use harmony

by Erica Marchand

Paris, France (SPX) Apr 23, 2025

A research team from the Politecnico di Milano has presented new insights into how agrivoltaic systems could resolve growing tensions over land use between agricultural production and solar energy development. Led by Maddalena Curioni, Nikolas Galli, Giampaolo Manzolini, and Maria Cristina Rulli, the study demonstrates that integrating photovoltaic panels with crop cultivation can significantly mitigate land-use conflict while maintaining food output.

Published in the journal Earth’s Future, the study highlights that between 13% and 16% of existing ground-mounted solar installations have displaced former farmland, underscoring the competition for arable land. In contrast, the researchers propose that deploying agrivoltaic systems on between 22% and 35% of non-irrigated agricultural land could enable dual use without substantially affecting crop yields.

Using a spatial agro-hydrological model, the researchers simulated how 22 crop types respond to varying degrees of solar shading from photovoltaic panels. Their simulations covered a broad range of climates and geographies, generating a global suitability map for agrivoltaic deployment. The results underscore the feasibility of this approach in many regions, especially those with compatible crops and moderate solar intensity.

“Agrivoltaics cannot be applied everywhere, but according to our results, it would be possible to combine cultivation and energy production in many areas of the world without significant reductions in yield,” said Nikolas Galli, researcher at the Glob3Science Lab and co-author of the study.

Giampaolo Manzolini, professor in the Department of Energy, noted additional benefits: “Using the land for both cultivation and photovoltaic systems increases overall output per occupied surface area while reducing production costs. In addition, installing crops underneath the photovoltaic panels reduces the panel operating temperature and increases their efficiency.”

“This technology could help reduce land competition while improving the sustainability of agricultural and energy systems,” added Maria Cristina Rulli, who coordinated the research.

The team emphasizes that their findings could inform strategic policy decisions and investment strategies aimed at maximizing land productivity while supporting both food security and renewable energy goals.

Research Report:Global Land-Water Competition and Synergy Between Solar Energy and Agriculture