tag: Rice University

Power/Performance Bits: Jan. 20
By Ann Mutschler - 20 Jan, 2015 - Comments: 0

Boosting silicon solar cells According to Stanford researchers, stacking crystalline perovskites onto a conventional silicon solar cell dramatically improves the overall efficiency of the cell. The researchers reminded that silicon solar cells dominate the world market, but the power conversion efficiency of silicon photovoltaics has been stuck at 25 percent for 15 years. One inexpensive wa... » read more

System Bits: Dec. 23
By Ann Mutschler - 23 Dec, 2014 - Comments: 0

Mini particle accelerator Researchers at MIT who succeeded last year in creating a material that could trap light and stop it in its tracks have now developed a more fundamental understanding of the process. The new work — which they said could help explain some basic physical mechanisms — shows that this behavior is connected to a wide range of other seemingly unrelated phenomena. Ligh... » read more

Power/Performance Bits: Sept. 16
By Ann Mutschler - 16 Sep, 2014 - Comments: 0

Phosphorus: a promising semiconductor According to researchers at Rice University, defects damage the ideal properties of many 2D materials, like carbon-based graphene, but phosphorus just shrugs, making it a promising candidate for nano-electronic applications that require stable properties. The team analyzed the properties of elemental bonds between semiconducting phosphorus atoms in 2D s... » read more

System Bits: Aug. 19
By Ann Mutschler - 19 Aug, 2014 - Comments: 0

Revealing the purity of graphene Graphene may be tough, but those who handle it had better be tender, according to researchers from Rice University and Osaka University who have come up with a simple way to spot contaminants given that the environment surrounding the atom-thick carbon material can influence its electronic performance. It is so easy to accidentally introduce impurities into ... » read more

System Bits: August 5
By Ann Mutschler - 05 Aug, 2014 - Comments: 0

A better conductor There are now new clues about one of the baffling electronic properties of the iron-based high-temperature superconductor barium iron nickel arsenide, according to a Rice University-led team of U.S., German and Chinese physicists that has discovered, based on sophisticated neutron measurements, of a link between magnetic properties and the material’s tendency, at sufficien... » read more

System Bits: July 22
By Ann Mutschler - 22 Jul, 2014 - Comments: 0

All graphene is not the same Widely touted as the most electrically conductive material ever studied, researchers at the University of Pennsylvania now understand that all graphene is not the same. With so few atoms comprising the entirety of the material, the arrangement of each one has an impact on its overall function. The team has used an advanced microscope to study the relationship be... » read more

System Bits: July 15
By Ann Mutschler - 15 Jul, 2014 - Comments: 0

Silicon oxide memories Thanks to a refinement that will allow manufacturers to fabricate devices at room temperature with conventional production methods, Rice University’s silicon oxide technology for high-density, next-generation computer memory is one step closer to mass production. Rice’s silicon oxide memories are a type of two-terminal, “resistive random-access memory” (RRAM) ... » read more

System Bits: July 8
By Ann Mutschler - 08 Jul, 2014 - Comments: 0

Carbon nanotubes “unzipped” into graphene nanoribbons by a chemical process invented at Rice University are finding use in all kinds of projects, but Rice scientists have now found a chemical-free way to unzip them. A Rice materials scientist discovered that nanotubes that hit a target end first turn into mostly ragged clumps of atoms, but nanotubes that happen to broadside the target un... » read more

Power/Performance Bits: June 24
By Ann Mutschler - 24 Jun, 2014 - Comments: 0

Solar-cell efficiency in one step Rice University scientists have created a single-step process for producing highly efficient materials that let the maximum amount of sunlight reach a solar cell. The Rice lab of chemist Andrew Barron found a simple way to etch nanoscale spikes into silicon that allows more than 99 percent of sunlight to reach the cells’ active elements, where it can be t... » read more

Power/Performance Bits: June 17
By Ann Mutschler - 17 Jun, 2014 - Comments: 0

Nanotubes boost terahertz detectors Researchers at Rice University, Sandia National Laboratories and the Tokyo Institute of Technology have developed novel terahertz detectors based on carbon nanotubes that could improve medical imaging, airport passenger screening, food inspection and other applications. Unlike current terahertz detectors, the devices are flexible, sensitive to polarizatio... » read more

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