Organic semiconductors could usher in a new era of electronics. But there is one serious drawback: Organic semiconductors do not conduct electricity very well. However, researchers at Stanford University have changed that equation by improving the ability of the electrons to move through organic semiconductors.
Creating semiconductor structures for high-end optoelectronic devices just got easier, thanks to University of Illinois researchers. The team developed a method to chemically etch patterned arrays in the semiconductor gallium arsenide.
The development of new and advanced materials is often the driver for other industries, such as those involving semiconductors, composites, thin films and coatings, medical devices, chemical and environmental processes, energy systems, and biopharmaceutical products. R&D for these materials involves developing new characteristics, properties, processing capabilities, and entirely new chemical families.
A new chemical technique for depositing a non-crystalline form of silicon into the long, ultra-thin pores of optical fibers has been developed by an international team of scientists. The method is the first of its kind to use high-pressure chemistry to make this particular kind of well-developed films and wires.
Lawrence Berkeley National Laboratory engineers have pioneered a new inexpensive technique for fabricating large-scale flexible and stretchable backplanes using semiconductor-enriched carbon nanotube solutions. Their method yields networks of thin film transistors with excellent charge carrier mobility.
To build denser electronics, developers of 3D, or stacked, chips, have primarily used copper. However, copper has several disadvantages that can limit the reliability of 3D electronics. Researchers have recently demonstrated that two stacked chips can also be vertically interconnected with carbon nanotube vias through the chips.
Researchers from Purdue and Harvard universities have created a new type of transistor made from a material that could replace silicon and have a 3D structure instead of conventional flat computer chips.
A team of university researchers, aided by scientists at NIST, have succeeded in integrating a new, highly efficient piezoelectric material into a silicon microelectromechanical system. The invention offers much greater force response and electricity charge generation over previous piezoelectric materials.
After topping both the June and November 2011 TOP500 fastest computers list, RIKEN and Fujitsu’s “K” computer has bolstered its status as an all-around performer but ranking at the top in all four benchmarks of the 2011 HPC Challenge Awards at SC11 in Seattle.
To improve the electronic devices that keep our world organized, scientists are on the hunt for new semiconductor materials. One answer could lie with an unusual form of electrical conductivity that takes place at the junction of two oxides. However, a group of scientists were recently surprised to find the interface of two complex oxides—the polar lanthanum chromium oxide, and the nonpolar strontium titanium oxide—did not conduct electricity.
Tiny wires could help engineers realize high-performance solar cells and other electronics, according to University of Illinois researchers. The research group developed a technique to integrate compound semiconductor nanowires on silicon wafers, overcoming key challenges in device production.
Not all quantum dots are created equal, however—some, called simply "bad" quantum dots, blink in an irregular, unreliable way. This unreliability makes them problematic to work with. Researchers at Brookhaven National Laboratory's Center for Functional Nanomaterials have just figured out why bad dots are so unreliable.
A research team has recently discovered that silicon carbide, a commonly used semiconductor, contains crystal imperfections that can be controlled at a quantum mechanical level. This level of fine-tuning might allow developers to exploit quantum physics in this material at the nanoscale.
A new conformal coating technique developed at Cornell University has allowed researchers to apply gold nanoparticles and conductive polymer layers to the irregular topography of cotton fibers, creating a flexible, cotton-based transistor that is fully tunable.
Just as a corset improves the appearance of its wearer by keeping everything tightly together, new rigidly constraining insulating materials invented at Duke University helps prevent the inevitable microscopic breakdown of the “soft” polymers often used in their construction.
Researchers from North Carolina State University and Purdue University have shown that the semiconductor material gallium nitride (GaN) is non-toxic and is compatible with human cells—opening the door to the material's use in a variety of biomedical implant technologies.
Recent breakthroughs have enabled scientists from the Northwestern University's Center for Quantum Devices to build cameras that can see more than one optical waveband or "color" in the dark. The semiconducting material used in the cameras—called type-II superlattices—can be tuned to absorb a wide range of infrared wavelengths, and now, a number of distinct infrared bands at the same time.
Sometimes a change in surroundings makes all the difference. That's the approach a group of researchers at Brookhaven National Laboratory has used to improve the electricity output of a semiconductor material used in polymer-based solar cells.
Samsung and a team of researchers in Korea have modified resistance-change random access memory to withstand 1012 switching cycles, which is about 100 times greater than previously demonstrated RRAM technologies and 1,000,000 times better than commercial flash memory.
Scientists from UCLA, led by Xiangfeng Duan, have built a graphene transistor that can perform on par with the speediest transistors, including those made with gallium arsenide and indium phosphide.
Researchers in the UK have recently demonstrated what future electronic circuits made from graphene will probably look like. By sandwiching two sheets of graphene with another two-dimensional material, boron nitrate, the team created a graphene “Big Mac”.
A nearly $2 million grant at the University of California, Riverside is being put to use in making silicon-based electronics obsolete. The new approach will depend on the development of a magnetologic gate, a transistor replacement that is built with graphene.
Rice University physicists have created a tiny "electron superhighway" that could one day be useful for building a quantum computer. The physicists described a new method for making a tiny device called a "quantum spin Hall topological insulator", which is one of the building blocks needed to create quantum particles that store and manipulate data.
Researchers led by Massachusetts Institute of Technology professor Daniel Nocera have produced something they're calling an "artificial leaf". Like living leaves, the device can turn the energy of sunlight directly into a chemical fuel that can be stored and used later as an energy source.
Researchers from the University of Toronto, King Abdullah University of Science & Technology, and Pennsylvania State University have created the most efficient colloidal quantum dot (CQD) solar cell ever.