Category Physics

Organic Photovoltaic cells: Heliatek claims conversion efficiency record

Organic photovoltaic cells: Heliatek claims conversion efficiency record

Heliafilm – superior low light and high temperature energy harvesting performance.

Note that number, 13.2%. Heliatek, in its research for new organic absorber materials, said it set a new organic photovoltaic (OPV) world record for the direct conversion of sunlight into electricity using OPV multi-junction (using more than one material) cell, thanks to the “excellent low light and high temperature behavior of the organic semiconductor.”

Heliatek said they had a small molecule, vacuum deposition process on a plastic film substrate. The cell is a multi-junction cell combining 3 absorbers. Each of them is dedicated to convert green-, red- or near-infrared light of the wavelength range between 450 and 950 nm into electricity...

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Intelligent robots threaten millions of jobs

Robots at the Fiat Chrysler Automobiles US Warren Stamping Plant are seen in Michigan

Robots at the Fiat Chrysler Automobiles US Warren Stamping Plant are seen in Michigan

Advances in artificial intelligence will soon lead to robots that are capable of nearly everything humans do, threatening tens of millions of jobs in the coming 30 years, experts warned Saturday.

“We are approaching a time when machines will be able to outperform humans at almost any task,” said Moshe Vardi, director of the Institute for Information Technology at Rice University in Texas.

“I believe that society needs to confront this question before it is upon us: If machines are capable of doing almost any work humans can do, what will humans do?” he asked at a panel discussion on artificial intelligence at the annual meeting of the American Association for the Advancement of Science.

Vardi said there w...

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A new form of Frozen Water? Scientists reveal New Ice with Record-low density

An illustration of the ice's molecular configuration.

An illustration of the ice’s molecular configuration.

Uni of Nebraska-Lincoln-led research team has predicted a new molecular form of the slippery stuff that even Mother Nature has never borne. The proposed ice would be 25% less dense than a record-low form synthesized by a European team in 2014. If synthesized, it would become the 18th known crystalline form of water—and the 1st discovered in the US since before World War II, lowest-density ice to date.

This newest finding represents the latest in a long line of ice-related research from Zeng, who previously discovered a 2D “Nebraska Ice” that contracts rather than expands when frozen under certain conditions.
This new study used a computational algorithm and molecular simulation to determine the ranges of extreme pressure and temperatu...

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Common Glass used to Optimize Graphene’s Electronic Properties

Left: This is a schematic of a graphene field-effect-transistor used in this study. The device consists of a solar cell containing graphene stacked on top of a high-performance copper indium gallium diselenide (CIGS) semiconductor, which in turn is stacked on an industrial substrate (either soda-lime glass, SLG, or sodium-free borosilicate glass, BSG). The research revealed that the SLG substrate serves as a source of sodium doping, and improved device performance in a way not seen in the sodium-free substrate. Right: A scanning electron micrograph of the device as seen from above, with the white scale bar measuring 10 microns, and a transmission electron micrograph inset of the CIGS/graphene interface where the white scale bar measures 100 nanometers. Credit: Brookhaven National Laboratory

Left: This is a schematic of a graphene field-effect-transistor used in this study. The device consists of a solar cell containing graphene stacked on top of a high-performance copper indium gallium diselenide (CIGS) semiconductor, which in turn is stacked on an industrial substrate (either soda-lime glass, SLG, or sodium-free borosilicate glass, BSG). The research revealed that the SLG substrate serves as a source of sodium doping, and improved device performance in a way not seen in the sodium-free substrate. Right: A scanning electron micrograph of the device as seen from above, with the white scale bar measuring 10 microns, and a transmission electron micrograph inset of the CIGS/graphene interface where the white scale bar measures 100 nanometers...

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