With the summer temperatures in Osaka, Japan, it rises closer to 100 degrees Fahrenheit, employees in Exhibition 2025 They hit the heat with the sun’s jackets.
It was developed by Toyota Group Company Toyoda Gosei, in cooperation with Enecoat Startup and Seiren Seiren, facilities jackets are equipped with very flexible solar panels weighing less than four grams of each-one-leaf-and fans of the neck of power to maintain the cold of its wearer.
These solar “films” are not like silicone panels installed on surfaces or solar farms, which represent 98 % of the solar energy market today. Instead, it is made of perovskites, a family of crystals that share the same distinctive structure.
Perovskite solar cells are lighter, cheaper for their production, and can be adjusted to absorb a wider set of light, including visible and close to infrared. “Under the shade, in rainy weather and clouds,” says Shinisho Fuke, director of Toyoda Jose, behind the jacket.
Perovskite solar panels operate a mobile battery package and a personal neck fan. Dan Campy/CNN
In the laboratory, the solar Enecoat movie achieved 21.2 % efficiency, which means that about a fifth of solar energy is converted into electricity. Now, it is tested in the circumstances of the real world in the exhibition.
The team collects data daily on how to respond to different climate conditions, such as solar radiation and temperature, in addition to performing the mobile phone battery that connects to it, which is expected to be fully charged in five to 10 hours.
According to Fuki, the project is a “global initiative” to integrate solar Perovskite cells into wearable devices. “We hope that people who work in an environment will use as they cannot get energy easily without solar energy,” he added.
Low -light solar energy
Employees ’interest jackets are tested throughout the exhibition 2025. – Dan Campsi/CNN
Perovskites can be found in nature or made in the laboratory, and it has been displayed in solar cells for the first time In 2009 by researchers in Japan.
In laboratory settings, PEROVSKITES has achieved energy conversion efficiency with more than 26 %-about the same most performed silicone solar panels today, which almost reach their efficiency.
Tamotsu Horiuchi, director and chief technology employee at Enecoat Technologies, says that one of the greatest advantages of Perovskites is their ability to “generate power at home or in low -light environments.
“When you are inside, instead of sunlight, LED lights, fluorescent lamps or lights like energy production will be used,” says Horiuchi. Because it is more flexible and lightweight than silicone panels, “we can install solar panels even in places that were impossible before”, as he adds – such as surfaces that cannot support silicone solar panels, which can reach about 50 pounds (23 kg).
The Peruvishing Clarification jackets at the exhibition are not: Polish Saudi Technologies has published curved solar cells in “smart columns” that show the lights of Power Street Street, security cameras, digital banners and wireless charging, and the Japanese company Sekisui Chemical that shows its local film with one thieves on the surface of the bus.
in Panasonic Group PavilionPeruvakite solar cells are converted between layers of glass to provide additional durability to an artistic interface to display the aesthetic capabilities of technology.
“It is difficult to install the current solar panels (silicon) in our living space,” says Yoshiteru Hara, coach of Panasonic Pavilion at Expo 2025 Osaka. “We need to achieve a balance between design and power generation efficiency.”
Panasonic Group Pavilion Future Cities Integrated Cities with Light Weight Perveskite Solar Paintings. Dan Campy/CNN
Perovskite solar cells operate this “smart” pole in the 2025 exhibition. – Dan Campy/CNN
High -energy, short -term
Japan invests extensively in Perovskite technology to achieve ambitious goals to generate 20 GB of solar energy by 2040, which is the equivalent force produced by about 20 nuclear power plants. The nation is the second largest producer in the world iodineIt is a major element in Perovskites, and mountainous terrain in the country limits the potential development of traditional solar farms, which require huge amounts of flat land.
However, despite the advantages, perovskites decomposes faster than silicon when exposed to heat, moisture or ultraviolet radiation, and loss of efficiency within a few years, months or even weeks.
“Everyone is now working on stability:” this is the only thing that perovskites lacks and still has compared to silicon, “says Dr. Hashini Pereira, a graduate research colleague at the Advanced Technology Institute at Sari University, where Peoplestet is studying:” This is the only thing that perovskites lacks and still has compared to silicon, “they study perovskites.
Researchers explore different ways to make Perovskites more durable, such as adding “stability factors” or film packaging in protective layers, such as Glass, says Pereira, who says Modern research Discover a method that can increase the age of materials ten times.
Another challenge of Perovskites is that it contains lead, which is toxic. Studies have shown If damaged, this may be an environmental danger, but Pereira says that the possibility of lead leakage is very low, especially with strong packaging methods.
Although the solar cells that use Perovskite only may still have a long marketing way, they are already improving the current panels: last year, Oxford PV, a company wandering from the Department of Oxford University, launched the first Perovaskite commercial panels ranging in the United States, 20 % more energy From independent silicone cells.
“It is a tremendous step forward for Berovskite,” says Pereira.
Horiuchi, chief technology official at Enecoat, says the ability of Perovskite to bring energy generation to urban areas is closer to its place of use, will make future cities more efficient.
“It is more effective to use the electricity generated directly there (on the site) to operate the same building,” says
Additional reports by Yumi Asada, CNN.
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