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On the way to Multiband Solar Cells

Schematic of electron/hole transfer within intermediate band solar cell with GaNAs alloy as the light absorber.

Berkeley Lab researchers have developed an intermediate band solar cell that opens the door to high-efficiency solar cells and multicolor light emitters.

A New Way to Look at MOFs

A technique called “gas adsorption crystallography” that provides a new way to study the process by which metal–organic frameworks (MOFs) store immense volumes of gases such a carbon dioxide, hydrogen and methane. (Image by Hexiang Deng)

An international collaboration led by Berkeley Lab’s Omar Yaghi has developed a technique called “gas adsorption crystallography” that provides a new way to study the process by which metal–organic frameworks (MOFs) are able to store immense volumes of gases such as carbon dioxide, hydrogen and methane.

On the Road to ANG Vehicles

Metal–organic frameworks (MOFs) with flexible gas-adsorbing pores could make the driving range of adsorbed-natural-gas (ANG) cars comparable to that of a typical gasoline-powered car.

Berkeley Lab researchers have developed metal–organic frameworks (MOFs) that feature flexible gas-adsorbing pores, giving them a high capacity for storing methane. This capability has the potential to help make the driving range of adsorbed-natural-gas (ANG) cars comparable to that of a typical gasoline-powered car.

Exciting Breakthrough in 2D Lasers

In the whispering gallery mode of a 2D excitonic laser made from a monolayer of tungsten disulfide and a microdisk resonator, the localization of the electric field at the edges of the resonator helps promote a high Q factor with low power consumption.

An important step towards next-generation ultra-compact photonic and optoelectronic devices has been taken with the realization of a two-dimensional excitonic laser. Berkeley Lab researchers have embedded a monolayer of tungsten disulfide into a microdisk resonator to achieve bright excitonic lasing at visible light wavelengths.

Computing A Textbook of Crystal Physics

Rachel feature

Researchers at Berkeley Lab and UC Berkeley have developed a methodology that enabled them to compute piezoelectric constants for nearly 1,000 inorganic compounds.

A Different Type of 2D Semiconductor

Peidong image peovskite best

Berkeley Lab researchers have produced the first atomically thin 2D sheets of organic-inorganic hybrid perovskites. These ionic materials exhibit optical properties not found in 2D covalent semiconductors such as graphene, making them promising alternatives to silicon for future electronic devices.

Making 3D Objects Disappear

Xiang Zhang feature image cloak

Berkeley researchers have devised an ultra-thin invisibility “skin” cloak that can conform to the shape of an object and conceal it from detection with visible light. Although this cloak is only microscopic in size, the principles behind the technology should enable it to be scaled-up to conceal macroscopic items as well.

Defects Through the Looking Glass

Rachel Berk feature

Berkeley Lab researchers have demonstrated a new method that can be applied to study individual defects in a widely used bulk insulating material, hexagonal boron nitride (h-BN), by employing scanning tunneling microscopy (STM).

Soaking Up Carbon Dioxide and Turning it into Valuable Products

Structural model showing a covalent organic framework (COF)  embedded with a cobalt porphyrin.

Berkeley Lab researchers have incorporated molecules of porphyrin CO2 catalysts into the sponge-like crystals of covalent organic frameworks (COFs) to create a molecular system that not only absorbs CO2, but also selectively reduces it to CO, a primary building block for a wide range of chemical products.

Another Milestone in Hybrid Artificial Photosynthesis

Peidong Yang CJC Bioinorganic Solar to Chemical Text

Berkeley Lab researchers using a bioinorganic hybrid approach to artificial photosynthesis have combined semiconducting nanowires with select microbes to create a system that produces renewable molecular hydrogen and uses it to synthesize carbon dioxide into methane, the primary constituent of natural gas.