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Category: solar power

Scientists discover way to pause ultrafast melting in silicon using precisely timed laser pulses

A team of physicists has discovered a method to temporarily halt the ultrafast melting of silicon using a carefully timed sequence of laser pulses. This finding opens new possibilities for controlling material behavior under extreme conditions and could improve the accuracy of experiments that study how energy moves through solids.

The research, published in the journal Communications Physics, was led by Tobias Zier and David A. Strubbe of the University of California, Merced, in collaboration with Eeuwe S. Zijlstra and Martin E. Garcia from the University of Kassel in Germany. Their work focuses on how intense, affect the atomic structure of silicon—a material widely used in electronics and solar cells.

Using , the researchers showed that a single, high-energy laser pulse typically causes silicon to melt in a fraction of a trillionth of a second.

Heterostructure-Engineered Semiconductor Quantum Dots toward Photocatalyzed-Redox Cooperative Coupling Reaction

Semiconductor quantum dots have been emerging as one of the most ideal materials for artificial photosynthesis. Here, we report the assembled ZnS-CdS hybrid heterostructure for efficient coupling cooperative redox catalysis toward the oxidation of 1-phenylethanol to acetophenone/2,3-diphenyl-2,3-butanediol (pinacol) integrated with the reduction of protons to H2. The strong interaction and typical type-I band-position alignment between CdS quantum dots and ZnS quantum dots result in efficient separation and transfer of electron-hole pairs, thus distinctly enhancing the coupled photocatalyzed-redox activity and stability. The optimal ZnS-CdS hybrid also delivers a superior performance for various aromatic alcohol coupling photoredox reaction, and the ratio of electrons and holes consumed in such redox reaction is close to 1.0, indicating a high atom economy of cooperative coupling catalysis. In addition, by recycling the scattered light in the near field of a SiO2 sphere, the SiO2-supported ZnS-CdS (denoted as ZnS-CdS/SiO2) catalyst can further achieve a 3.5-fold higher yield than ZnS-CdS hybrid. Mechanistic research clarifies that the oxidation of 1-phenylethanol proceeds through the pivotal radical intermediates of • C(CH3)(OH)Ph. This work is expected to promote the rational design of semiconductor quantum dots-based heterostructured catalysts for coupling photoredox catalysis in organic synthesis and clean fuels production.

Copyright © 2023 Lin-Xing Zhang et al.

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Semi-transparent solar cells achieve record efficiency to advance building-integrated photovoltaics

A research team has developed an innovative parameter, FoMLUE, to evaluate the potential of photoactive materials for semi-transparent organic photovoltaics (ST-OPVs), paving the way for their widespread commercial applications.

A paper reporting the research, “Semitransparent organic photovoltaics with wide geographical adaptability as sustainable ,” has been published in Nature Communications.

Transparent solar cells can be integrated into windows, screens and other surfaces, with immense potential for them to revolutionize the renewable energy sector. However, there are challenges to overcome, one of which is balancing transparency with .

Shall we Dance in Free-Space? a Choice of Freedom!

Humanity stands at a crossroads. Our beautiful Earth, cradle of all we know, is straining under the weight of nearly 8.5 billion people. Environmental degradation, social inequity, and resource scarcity deepen by the day. We are reaching the limits of a single-planet civilization. We can face this challenge in two ways. Some will cling to the old patterns—fighting over dwindling resources and defending narrow borders. Others will rise above, expanding into space not to escape Earth, but to renew and sustain it. These pioneers—the Space Settlers —will carry the next chapter of civilization beyond our home planet.

The Humanist Path: Living in Free Space. When people imagine living beyond Earth, they often picture Lunar or Martian colonies. Yet, from a humanist perspective, a better path exists: rotating free space habitats, as envisioned by Gerard K. O’Neill. These are vast, spinning structures orbiting Earth or the Moon, or standing at Lagrange Libration Points, designed to simulate Earth’s gravity and sustain full, flourishing communities. Unlike planetary colonies bound to weak gravity, dust, or darkness, O’Neill habitats offer: 1g simulated gravity to preserve human health; continuous sunlight and abundant solar energy; freedom of movement, as habitats can orbit safely or relocate if needed. More than technical achievements, these habitats embody the Enlightenment spirit—the belief that reason, ethics, and creativity can design environments of dignity, beauty, and freedom.

Freedom and Human Dignity in Space. Freedom is at the heart of humanity’s destiny. Consider a lunar settler who finds his bones too fragile to withstand Earth’s gravity—trapped by biology, after a few years living on the Moon. In contrast, inhabitants of a rotating habitat retain the freedom to return on Earth, at will. Simulated gravity safeguards their health, ensuring that space settlement remains reversible and voluntary. Freedom of movement leads naturally to freedom of culture. In a habitat like “New Gaia”, thousands of people from all nations live together: Russians celebrating Maslenitsa, Indians lighting Diwali lamps, and space-born storytellers sharing ancient myths. New traditions also emerge—festivals, music, and art inspired by life between worlds. These habitats can become beacons of a new Renaissance —a rebirth of cultural and creative freedom beyond the constraints of geography and politics.

Solar energy is now the world’s cheapest source of power, study finds

Solar energy is now so cost-effective that, in the sunniest countries, it costs as little as £0.02 to produce one unit of power, making it cheaper than electricity generated from coal, gas or wind, according to a new study from the University of Surrey.

In a study accepted for publication in Energy and Environment Materials, researchers from Surrey’s Advanced Technology Institute (ATI) argue that solar photovoltaic (PV) technology is now the key driver of the world’s transition to clean, renewable power.

Professor Ravi Silva, co-author of the study and Director of the ATI at the University of Surrey, said, Even here in the U.K., a country that sits 50 degrees north of the equator, solar is the cheapest option for large-scale energy generation.

Radical Plan to Beam ‘Sunlight on Demand’ at Night Sparks Concerns

A proposed constellation of satellites has astronomers very worried. Unlike satellites that reflect sunlight and produce light pollution as an unfortunate byproduct, the ones by US startup Reflect Orbital would produce light pollution by design.

The company promises to produce “sunlight on demand” with mirrors that beam sunlight down to Earth so solar farms can operate after sunset.

It plans to start with an 18-metre test satellite named Earendil-1 which the company has applied to launch in 2026. It would eventually be followed by about 4,000 satellites in orbit by 2030, according to the latest reports.

Cambridge Scientists Unlock Century-Old Quantum Secret That Could Revolutionize Solar Power

Cambridge scientists have uncovered a hidden quantum mechanism in an organic semiconductor that could revolutionize solar energy. In a finding that connects modern research with ideas from a century ago, scientists have identified in an organic semiconductor a behavior that was long believed to o

From engines to nanochips: Physicists redefine how heat really moves

Heat has always been something we thought we understood. From baking bread to running engines, the idea seemed simple: heat spreads out smoothly, like water soaking through a sponge. That simple picture, written down by Joseph Fourier 200 years ago, became the foundation of modern science and engineering.

But zoom into the nanoscale—inside the chips that power your smartphone, AI hardware, or next-generation solar panels—and the story changes. Here, heat doesn’t just “diffuse.” It can ripple like , remember its past, or flow in elegant streams like a fluid in a pipe. For decades, scientists had pieces of this puzzle but no unifying explanation.

Now, researchers at Auburn University and the U.S. Department of Energy’s National Renewable Energy Laboratory have delivered what they call a “unified statistical theory of heat conduction.”

Jeff Bezos envisions space-based data centers in 10 to 20 years

Jeff Bezos envisions gigawatt-scale orbital data centers within 10–20 years, powered by continuous solar energy and space-based cooling, but the concept remains commercially unviable today due to the immense cost and complexity of deploying thousands of tons of hardware, solar panels, and radiators into orbit.

Spinel-type sulfide semiconductors achieve room-temperature light emission across violet to orange spectrum

A spinel-type sulfide semiconductor that can emit light from violet to orange at room temperature has been developed by researchers at Science Tokyo, overcoming the efficiency limitations of current LED and solar cell materials. The material, (Zn, Mg)Sc2S4, can be chemically tuned to switch between n-type and p-type conduction, leading to future pn homojunction devices. This versatile semiconductor offers a practical path toward the development of more efficient LEDs and solar cells.

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