Category Physics

Speeding up Commercialization of Electric Vehicles

Speeding up commercialization of electric vehicles
Credit: Pohang University of Science & Technology (POSTECH)

Professor Byoungwoo Kang develops a high-density cathode material through controlling local structures of the Li-rich layered materials.

Researchers in Korea have developed a high-capacity cathode material that can be stably charged and discharged for hundreds of cycles without using the expensive cobalt (Co) metal. The day is fast approaching when electric vehicles can drive long distances with Li- ion batteries.

The research team achieved this by controlling the local structure via developing the simple synthesis process for the Li-rich layered material that is attracting attention as the next-generation high-capacity cathode material...

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‘Egg Carton’ Quantum Dot Array could lead to Ultralow Power Devices

An illustration of the egg crate electronic structure, shown between two mirrors so that the red laser light resonates. The polaritons, trapped in the pockets, are represented by the sum of their parts: a green exciton, with electron and hole shown inside, attached to a red lightwave. Even with just a few excitons in the wells, the energy required to add a new one begins to jump
  An illustration of the egg crate electronic structure, shown between two mirrors so that the red laser light resonates. The polaritons, trapped in the pockets, are represented by the sum of their parts: a green exciton, with electron and hole shown inside, attached to a red lightwave. Even with just a few excitons in the wells, the energy required to add a new one begins to jump. Credit: Long Zhang, Deng Lab, University of Michigan.

A new path toward sending and receiving information with single photons of light has been discovered by an international team of researchers led by the University of Michigan...

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Dethroning Electrocatalysts for Hydrogen Production with Inexpensive Alternative Material

Dethroning Electrocatalysts for Hydrogen Production with Inexpensive Alternative Material

Today, we can say without a shadow of doubt that an alternative to fossil fuels is needed. Fossil fuels are not only non-renewable sources of energy but also among the leading causes of global warming and air pollution. Thus, many scientists worldwide have their hopes placed on what they regard as the fuel of tomorrow: hydrogen (H2). Although H2 is a clean fuel with incredibly high energy density, efficiently generating large amounts of it remains a difficult technical challenge.

Water splitting — the breaking of water molecules — is among the most explored methods to produce H2. While there are many ways to go about it, the best-performing water splitting techniques involve electrocatalysts made from expensive metals, such as platinum, ruthenium, and iridium...

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New Strategy for Efficient OLED Active Matrix Displays

The device architecture of organic permeable base light-emitting transistors (OPB-LET).

Researchers introduce a novel device concept towards high-efficient and low-voltage vertical organic lighting-emitting transistors. With the new device architecture and fabrication technology, the team paves the way for a broad application of efficient OLED active matrix displays.

In the group of Prof. Karl Leo, physicists, material scientists and engineers are working jointly on the development of novel organic materials and devices for high performance, flexible and possibly even biocompatible electronics and optoelectronics of the future. Increasing the performance of organic devices is one of the key challenges in their research. It was only last year, when the team headed by Dr...

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