Singapore Scientists Make Windows That Generate Power

Imagine every window in your office building quietly generating electricity while you work. Scientists in Singapore just made that future 50 times closer to reality.

Researchers at Nanyang Technological University have developed solar cells just 10 nanometers thick. That's about 500 times thinner than a sheet of paper, and it means windows can finally pull double duty as power sources.

The breakthrough uses a material called perovskite applied through a technique called thermal evaporation. Unlike traditional bulky solar panels, these cells are semi-transparent, so they let light through while capturing energy.

Here's what makes this especially exciting: the cells generate electricity even under diffuse light. That means cloudy days, indoor lighting, and the soft glow of dawn all become opportunities to harvest power.

The technology isn't just theoretical. The research team has already achieved 12% efficiency in their opaque devices and filed a patent for the innovation. While that efficiency might sound modest, it's remarkable for something thin enough to coat existing windows without blocking views.

Singapore itself is betting big on solar power. The nation recently raised its 2030 solar deployment target to 3 gigawatts after adding a record 504 megawatts in 2025 alone. But land is precious in the city-state, making vertical surfaces like building windows an essential frontier.

The Ripple Effect

This innovation could reshape how we think about urban architecture. Every skyscraper becomes a potential power plant. Office towers that once just consumed energy could start producing it, reducing strain on electrical grids and cutting carbon emissions.

The technology addresses a challenge cities worldwide face: how to expand renewable energy when ground space runs out. Turning millions of square feet of glass into generators doesn't require bulldozing forests or paving deserts.

Beyond Singapore, this could transform how developing nations approach electrification. Buildings in regions with unreliable power grids could generate their own electricity without expensive infrastructure upgrades.

The researchers are now working to improve efficiency and scale up production. If costs continue falling as they have with conventional solar panels, window-integrated power generation could become standard in new construction within a decade.

Sometimes the biggest breakthroughs don't come from doing something entirely new but from making existing solutions thin enough, cheap enough, and practical enough to put everywhere.