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Category: solar power

From cosmic strings to computer chips: Cooling rate triggers phase transitions in silicon surfaces

Solar cells and computer chips need silicon layers that are as perfect as possible. Every imperfection in the crystalline structure increases the risk of reduced efficiency or defective switching processes.

If you know how arrange themselves to form a on a thin surface, you gain fundamental insights into controlling crystal growth. To this end, an international research team analyzed the behavior of silicon that was flash-frozen. The study is published in the journal Physical Review Letters.

The results show that the speed of cooling has a major impact on the structure of silicon surfaces. The underlying mechanism may also have occurred during phase transitions in the early universe shortly after the Big Bang.

Bifacial thin-film solar cells harness sunlight from both sides for higher output

A research team successfully implemented CuInSe2 thin-film solar cells composed of copper (Cu), indium (In), and selenium (Se) on transparent electrode substrates. Furthermore, the team developed a “bifacial solar cell technology” that receives sunlight from both the front and back sides to generate power. This technology can be fabricated at low temperatures, enabling a simpler production process, and is broadly applicable to building-integrated solar power, agricultural solar power, and high-efficiency tandem solar cells in the future.

Self-powered solar panels remove dust using wind-generated electricity

A collaborative research team has successfully developed a self-powered pollution prevention technology that can remove pollutants from the surface of solar panels without external power. This technology uses a wind-powered rotational triboelectric nanogenerator to generate power and combines said power with electrodynamic screen (EDS) technology to move dust in the desired direction for removal.

The findings are published in the journal Nano Energy. The team was led by Professor Juhyuck Lee from the Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science & Technology, along with Dr. Wanchul Seung at Global Technology Research, Samsung Electronics.

The dust that gathers on the surface of solar panels causes a significant reduction in power production efficiency. EDS technology, designed to address this problem, uses electric fields to remove dust from the surface, and it is noted for environments that are not easily accessible, such as deserts, mountains, and space, as it does not require cleaning equipment or personnel. Traditional EDS technology, however, requires and, consequently, external power, and it has the disadvantage of additional maintenance costs.

Scientists repurpose old solar panels to convert CO₂ exhaust into valuable chemicals

Centuries ago, alchemists worked furiously to convert the common metal lead to valuable gold. Today, chemists are repurposing discarded solar panels to create valuable organic compounds from carbon dioxide (CO2), a common greenhouse gas.

Significantly reducing greenhouse gases in the atmosphere to mitigate the most devastating effects of climate change will require a large reduction in emissions as well as strategies designed to sequester emitted CO2 and other offending gases. While simply sequestering greenhouse gases would fulfill this goal, creating useful organic chemicals from waste CO2 is akin to generating valuable materials from trash.

A team of chemists from Yokohama National University, Electric Power Development Co., Ltd. and the Renewable Energy Research Center at the National Institute of Advanced Industrial Science and Technology (AIST) recently decided to tackle two waste problems—excess CO2 emissions and decommissioned —in the pursuit of creating value-added organic chemicals. The team designed a study to determine if recycled components of discarded solar panels could be used to efficiently convert CO2 into useful, carbon-based compounds.

World’s largest solar mural turns 34,500 sqft wall into power generator

The SunRise Building, a residential complex in Alberta, Canada, has established a Guinness World Record for the largest solar panel mural.

The installation combines art with building-integrated photovoltaics (BIPV), contributing to the building’s energy supply. This project measures 34,500 square feet and provides 267 kW of solar capacity, powering the building’s common areas.