Berkeley Lab researchers have developed the first ab initio method for characterizing the properties of “hot carriers” in semiconductors. This should help clear a major road block to the development of new, more efficient solar cells.
First Ab Initio Method for Characterizing Hot Carriers Could Hold the Key to Future Solar Cell Efficiencies
Danylo Zherebetskyy and his colleagues at the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) found unexpected traces of water in semiconducting nanocrystals. The water as a source of small ions for the surface of colloidal lead sulfide (PbS) nanoparticles allowed the team to explain just how the surface of these important particles
Probing dopant distribution: Finding by Berkeley Lab Researchers at the Molecular Foundry Opens the Door to Better Doping of Semiconductor Nanocrystals
Berkeley Lab researchers at the Molecular Foundry have shown that when doping a semiconductor to alter its electrical properties, equally important as the amount of dopant is how the dopant is distributed on the surface and throughout the material.
The DOE’s David Danielson, Assistant Secretary for Energy Efficiency and Renewable Energy, was on hand in Berkeley April 14 to tour FLEXLAB™, the Facility for Low Energy experiments in Buildings, run by Berkeley Lab’s Environmental Energy Technologies Division. Danielson and Berkeley Lab Director Paul Alivisatos also met with executives from construction firm Webcor. Webcor’s testing in FLEXLAB will allow its engineers to predict and improve the energy performance for a new building constructed for biotech company, Genentech. A building mockup for Genentech will be studied at different building orientations, specific to the actual construction site. As part of his visit to the Lab, Danielson also toured the Molecular Foundry.
Researchers at Berkeley Lab’s Molecular Foundry have discovered a unique new two-dimensional semiconductor, rhenium disulfide, that behaves electronically as if it were a 2D monolayer even as a 3D bulk material. This not only opens the door to 2D electronic applications with a 3D material, it also makes it possible to study 2D physics with easy-to-make 3D crystals.
Berkeley Lab researchers at the Molecular Foundry have discovered surprising new rules for creating ultra-bright light-emitting crystals that are less than 10 nanometers in diameter. These ultra-tiny but ultra-bright nanoprobes should be a big asset for biological imaging, especially deep-tissue optical imaging of neurons in the brain.
Supramolecular chemistry, aka chemistry beyond the molecule, in which molecules and molecular complexes are held together by non-covalent bonds, is just beginning to come into its own with the emergence of nanotechnology. Now a new player has joined the field – supramolecular organic frameworks (SOFs).
Berkeley Lab researchers have unveiled the first two-dimensional SOFs – supramolecular organic frameworks – that self-assemble in solution, an important breakthrough that holds implications for sensing and separation technologies, energy sciences, and biomimetics.
A unique inside look at the electronic structure of a highly touted metal-organic framework (MOF) as it is adsorbing carbon dioxide gas should help in the design of new and improved MOFs for carbon capture and storage.
Taking inspiration from the human immune system, researchers at Berkeley Lab have created a new material that can be programmed to identify an endless variety of molecules. The new material resembles tiny sheets of Velcro, each just one-hundred nanometers across. But instead of securing your sneakers, this molecular Velcro mimics the way natural antibodies recognize viruses and toxins, and could lead to a new class of biosensors.