Electron Mobility

Physicists have achieved a record-setting level of electron mobility in a thin film of ternary tetradymite. Materials like this will be essential for more efficient and sustainable electronic devices that can do more work with less power.

MIT and other researchers developed a framework that reveals phonon stability boundaries in six-dimensional strain space. By analyzing the phonon stability boundary, researchers can understand material properties at extreme conditions and design new materials with desired characteristics.

Earlier this month, researchers from the Georgia Institute of Technology in Atlanta published a paper in Nature. The study discusses producing epigraphene from silicon carbide (SiC). Semiconducting...

Researchers at Tohoku University used a femtosecond laser to successfully micro/nanofabricate graphene films, creating multi-point holes without damage and removing contaminants. The technique could replace traditional, more complex methods, offering potential advancements in quantum materials resea

Perovskite lasers have rapidly achieved progress in developing continuous-wave excited lasing from a femtosecond pulse excited lasing, which is considered a critical step towards electrically excited lasing. After continuous-wave lasing at room temperature, the next goal is to realize electrically driven lasing.

Scientists from Clemson University and the Indian Institute of Science have developed a metal oxide-based optically responsive symmetrical supercapacitor.

The shifting, scintillating pattern you can see when you stack two slightly misaligned window screens is called moiré. A similar interference effect occurs when scientists stack two-dimensional crystals with mismatched atomic spacings. Moiré superlattices display exotic physical properties that are absent in the layers that make up the patterns. These properties are rooted in the quantum nature of electrons.

Non-fused-ring organic photoactive materials have attracted broad attention in recent years due to their low synthetic cost. Different from the rigid coplanar structure of fused-ring molecules, the easily rotated conformation of non-fused-ring molecules could lead to the different energetic disorder, which greatly affects the intramolecular electron transport and thus the device performance.

Field-effect transistors (FETs) are transistors in which the resistance of most of the electrical current can be controlled by a transverse electric field. Over the past decade or so, these devices have proved to be very valuable solutions for controlling the flow of current in semiconductors.

Photoelectrochemical (PEC) water splitting is a promising green technique for renewable hydrogen production. To construct a practical PEC system, it is of great significance to develop efficient photoanodes. BiVO4 has been identified as the most promising photoanode material because of its narrow band gap and favorable band positions for hydrogen and oxygen evolution. Nevertheless, BiVO4 has limitations of low…

Organic thin-film transistors (OTFTs) are the basic building blocks for flexible and stretchable electronics. As organic semiconductor films usually contain significant structural and energetic disorder, charge carriers hop between localized states for charge transport, and thus the mobility of OTFTs generally shows thermally activated behavior, i.e., the mobility increases with increasing temperature. The increase…

A research team develops high performing p-type transistor using perovskite. Solution-processed metal halide perovskite transistors can now be printed.

Researchers achieved record-breaking electron mobility with a new material, paving the way for revolutionary advances in electronic devices and technology.

High-performance active terahertz (THz) modulators are of great importance for next generation communication technology. However, they currently suffer from the tradeoff between modulation depth and speed.

Scientists overcame a limitation in graphene to harness the material as a working semiconductor at terahertz frequencies with 10 times the mobility of silicon.

Electron-phonon scattering is often the primary mechanism limiting electron mobility in semiconductors. Thus, changing phonon properties can provide a way to control conductivity. Recently, there has been a growing interest in exploring the use of the quantum nature of light as an alternative approach. In this method, the material properties are modulated by tuning its interaction with the vacuum state of the…

Scientists have developed a superlattice of semiconductor quantum dots that functions like a metal, a significant leap forward in harnessing quantum dots' full potential. The researchers achieved metal-like conductivity in this lattice, one million times greater than current quantum dot displays, wi

Discovered in 2004, graphene has revolutionized various scientific fields. It possesses remarkable properties like high electron mobility, mechanical strength, and thermal conductivity. Extensive time and effort has been invested in exploring its potential as a next-generation semiconductor material, leading to the development of graphene-based transistors, transparent electrodes, and sensors.

A quantum time mirror puts wave packets back together.

Today, over half of the total energy produced from fossil fuels is discarded as waste heat, which accelerates global warming. If we could convert the waste heat into a more useful form of energy like electricity, we could minimize fuel consumption and reduce our carbon footprint. In this regard, thermoelectric energy conversion has gained momentum as a technology for generating electricity from waste heat.