Current Optoelectronic Devices News and Events

Current Optoelectronic Devices News and Events, Optoelectronic Devices News Articles.
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Wirelessly rechargeable soft brain implant controls brain cells
Researchers have invented a smartphone-controlled soft brain implant that can be recharged wirelessly from outside the body. It enables long-term neural circuit manipulation without the need for periodic disruptive surgeries to replace the battery of the implant. Scientists believe this technology can help uncover and treat psychiatric disorders and neurodegenerative diseases such as addiction, depression, and Parkinson's. (2021-01-26)

First comprehensive LCA shows reprocessed medical devices cut GHG emissions in half
Hospitals could cut emissions associated with some medical device use in half by opting instead for reprocessed 'single-use' medical devices. The LCA evaluated the use of a remanufactured electrophysiology catheter compared with the use of original catheters for 16 different environmental impact categories and found that the use of reprocessed devices was superior in 13 categories. (2021-01-25)

Reducing traps increases performance of organic photodetectors
Physicists at the Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) discovered that trap states rule the performance of organic photodetectors, ultimately limiting their detectivity. These highly promising results have now been published in the renowned scientific journal Nature Communications. (2021-01-22)

A professor from RUDN University developed new liquid crystals
A professor from RUDN University together with his Indian colleagues synthesized and studied new dibenzophenazine-based liquid crystals that could potentially be used in optoelectronics and solar panels. (2021-01-22)

Electrons caught in the act
Tsukuba University scientists create movies of the ultrafast motion of electrons traveling through an organic semiconductor with atomic-level resolution. This work may lead to more powerful and miniaturized smart devices. (2021-01-21)

RUDN University neurosurgeon created a method to collect mental activity data of software developers
A neurosurgeon from RUDN University studied the mental activity of developers at work. In his novel method, he combined mobile EEG devices and software that analyzes neurophysiological data. (2021-01-21)

Angstrom multilayer metrology by combining spectral measurements and machine learning
The 3D-NAND is the most commercially successful 3D memory device today, and its demand is growing exponentially. As each layer thickness corresponds to the effective channel length, accurate characterization and control of layer-by-layer thickness is critical. Engineers in South Korea invented a nondestructive thickness characterization method of each layer in semiconductor multilayer stacks with more than 200 layers used for 3D-NAND. The method will provide new ways for total inspection in 3D semiconductor device manufacturing. (2021-01-20)

One-dimensional quantum nanowires fertile ground for Majorana zero modes
One-dimensional quantum 'nanowires' - which have length, but no width or height - provide a unique environment for the formation and detection of a quasiparticle known as a Majorana zero mode, which are their own antimatter particle. A new UNSW advance in detection of these exotic quasiparticles (just published in Nature Communications) has potential applications in fault-resistant topological quantum computers, and topological superconductivity. (2021-01-19)

Purely organic hole transporter
Durable, high-performing perovskite solar cells also require durable, high-performing charge-transporting layers. Scientists have developed the first organic hole transporter that does not need a dopant to attain high charge mobility and stability. According to the study published in the journal Angewandte Chemie, this novel hole-transporting layer outperforms reference materials and protects the perovskite organic cell from air humidity. (2021-01-18)

CMOS-compatible 3D ferroelectric memory with ultralow power and high speed
POSTECH Professor Jang-Sik Lee's research team develops ferroelectric NAND flash memory. (2021-01-18)

Pillarene hybrid material shows enhanced tunable multicolor luminescence and sensing ability
Tunable luminescent materials are highly desirable owing to their broad application potential in various fields. Recently, a pillar[5]arene-based hybrid material with stimuli-responsive luminescent properties and ion sensing abilities has been elegantly constructed from a pyridine-modified conjugated pillar[5]arene and a planar chromophore oligo(phenylenevinylene) upon coordination of Cd (II) metal cores. Enhanced and tunable luminescence was achieved via the construction of the rigid coordinated structure and the effective modulation of pillar[5]arene. (2021-01-14)

USTC makes security analysis and improvement of quantum random number generation
Recently, the research team led by academician GUO Guangcan from the USTC of the Chinese Academy of Sciences has made security analysis and improvement of source independent quantum random number generators with imperfect devices. (2021-01-14)

Energy harvesting made possible with skin temperature
The Korea Institute of Science and Technology (KIST) announced that a collaborative research team led by Dr. Seungjun Chung from the Soft Hybrid Materials Research Center and Professor Yongtaek Hong from the Department of Electrical and Computer Engineering at Seoul National University (SNU) developed flexible thermoelectric devices with high power generation performance by maximizing flexibility and heat transfer efficiency. The research team also presented a mass-production plan through an automated process including a printing process. (2021-01-13)

The changing paradigm of next-generation semiconductor memory development
The Korea Institute of Science and Technology(KIST) has announced that the research team led by Dr. Kim Kyoung-Whan at the Center for Spintronics has proposed a new principle about spin memory devices, which are next-generation memory devices. This breakthrough presents new applicability that is different from the existing paradigm. (2021-01-12)

Long-range energy transport in perovskite nanocrystal films
High efficiency solar cells and light-emitting devices are end-goal targets towards a more sustainable world. Nanostructures possess distinct advantages due to their exceptional optical and electronic properties under the influence of light. Yet, their wide-spread application in real-world devices is limited by their poor transport properties. Scientists discovered that nanocrystals made with halide perovskites, a recently discovered revolutionary semiconductor, can lead to long-range energy transfer, opening new avenues for future devices implementing disruptive nanotechnologies. (2021-01-12)

No disassembly required: Non-destructive method to measure carrier lifetime in SiC
To develop high-voltage devices made with silicon carbide (SiC), a common semiconducting material, it is necessary to understand its charge carrier lifetime distribution within thick layers. However, available carrier lifetime measurement methods involve the destruction of the sample. Fortunately, in a recent study at Nagoya Institute of Technology, Japan, scientists have developed a novel non-destructive technique with enhanced depth resolution, which will bolster the development of efficient SiC devices for power generation and distribution systems. (2021-01-12)

University at Buffalo researchers report quantum-limit-approaching chemical sensing chip
University at Buffalo researchers are reporting an advancement of a chemical sensing chip that could lead to handheld devices that detect trace chemicals -- everything from illicit drugs to pollution -- as quickly as a breathalyzer identifies alcohol. (2021-01-11)

Liquid metal ink liberates form
POSTECH-Yonsei University joint research team develops liquid metal ink for 3D circuit lines. (2021-01-10)

Engineers find antioxidants improve nanoscale visualization of polymers
Reactive molecules, such as free radicals, can be produced in the body after exposure to certain environments or substances and go on to cause cell damage. Antioxidants can minimize this damage by interacting with the radicals before they affect cells. (2021-01-08)

A polarization-driven guide to making high-performance, versatile solar cells
When solar cells are exposed to sunlight, certain bound ''charge pairs'' are generated in its components, which need to be separated for photocurrent generation. Ferroelectric materials, due to their spontaneous electric polarization, are highly efficient at charge separation but do poorly in light-to-electricity conversion. Now, scientists from Korea have demonstrated using theoretical calculations that antiperovskite oxides, a class of ferroelectric materials, show large absorption of sunlight, making them suitable photoabsorbers for thin film solar cells. (2021-01-04)

Microfabricated elastic diamonds improve material's electronic properties
Overcoming a key obstacle in achieving diamond-based electronic and optoelectronic devices, researchers have presented a new way to fabricate micrometer-sized diamonds that can elastically stretch. (2020-12-31)

Stretching diamond for next-generation microelectronics
Diamond is the hardest material in nature. But out of many expectations, it also has great potential as an excellent electronic material. A joint research team led by City University of Hong Kong (CityU) has demonstrated for the first time the large, uniform tensile elastic straining of microfabricated diamond arrays through the nanomechanical approach. Their findings have shown the potential of strained diamonds as prime candidates for advanced functional devices in microelectronics, photonics, and quantum information technologies. (2020-12-31)

Industry collaboration leads to important milestone in the creation of a quantum computer
One of the obstacles for progress in the quest for a working quantum computer has been that the working devices that go into a quantum computer and perform the actual calculations, the qubits, have hitherto been made by universities and in small numbers. But in recent years, a pan-European collaboration, in partnership with French microelectronics leader CEA-Leti, has been exploring everyday transistors--that are present in billions in all our mobile phones--for their use as qubits. (2020-12-28)

Extremely energy efficient microprocessor developed using superconductors
Researchers from Yokohama National University in Japan have developed a prototype microprocessor using superconductor devices that are about 80 times more energy efficient than the state-of-the-art semiconductor devices found in the microprocessors of today's high-performance computing systems. (2020-12-28)

Astigmatism measures and corneal power obtained with different devices
The aim of the research is to compare the keratometric and total corneal astigmatism measures provided by three different technologies as well as to assess the level of interchangeability among them. (2020-12-22)

The first endovascular technology that can explore capillaries
EPFL scientists have invented a technique to navigate electronic devices that are smaller than human hair inside blood vessels and reach arterioles. The next step will be conducting in vivo tests. (2020-12-22)

Safe gun storage counseling and lock distribution could lower military suicide rate
Military members who receive gun locks and lethal means counseling, which focuses on ways to limit a person's access to specific methods for suicide, are more likely to use a gun safe and unload firearms before they are stored, according to the Gun Violence Research Center, based at Rutgers (2020-12-22)

E-cigarettes, as consumer products, do not help people quit smoking, study finds
E-cigarette use has risen steeply and mostly without regulation over the past decade. The devices have diversified into a dizzying array of vape pens, tank systems, ''mods,'' and more, mass-marketed and sold to the public. The U.S. Food and Drug Administration (FDA) is in the midst of considering whether to approve thousands of pre-market applications for the sale of e-cigarettes as consumer products. (2020-12-22)

Regulating off-centering distortion maximizes photoluminescence in halide perovskites
In work published in the National Science Review (nwaa288), a team at HPSTAR led by Dr. Xujie L├╝ applied high pressure to tune the remarkable photoluminescence (PL) properties in halide perovskites. For the first time, they reveal a universal relationship whereby regulating the level of off-centering distortion (towards 0.2) can achieve optimal PL performance. (2020-12-21)

Optoelectronic devices that emit warm and cool white light
A single semiconducting material can produce white light by emitting light across the visible spectrum. (2020-12-21)

Researchers develop Si-based super-high frequency nanoelectromechanical resonator
Recently, a group led by Prof. GUO Guoping from the University of Science and Technology of China of the Chinese Academy of Sciences, collaborating with Prof. ZHANG Zhen's group from Uppsala University, Sweden, designed and fabricated CMOS-compatible suspended SHT devices which worked as super-high frequency nanoelectromechanical resonators. The work was published in Advanced Materials. (2020-12-15)

Faraday fabrics?
Researchers at Drexel University's College of Engineering have reported that fabric coated with a conductive, two-dimensional material called MXene, is highly effective at blocking electromagnetic waves and potentially harmful radiation. The discovery is a key development for efforts to weave technological capabilities into clothing and accessories. (2020-12-11)

In your face: a compact RGB scanning projector for wearable displays and smart glasses
Scientists at the University of Fukui, Japan, have achieved remarkable progress in the development of an extremely compact RGB laser projector that can create a high definition (HD) projection image. Their device uses a waveguide-type coupler to produce perfectly aligned RGB output beams from three independent lasers and a microelectromechanical mirror to create high-resolution scanning images. With further refinements, this technology could become a mainstay in wearable displays such as smart glasses. (2020-12-10)

Atom-thin transistor uses half the voltage of common semiconductors, boosts current density
University at Buffalo researchers report a new, two-dimensional transistor made of graphene and molybdenum disulfide that needs less voltage and can handle more current than today's semiconductors. (2020-12-10)

"Game changer" perovskite can detect gamma rays
Scientists at EPFL have developed a game-changing perovskite material that can be used as a cheaper and highly efficient alternative to gamma-ray detectors. (2020-12-09)

Stretchable micro-supercapacitors to self-power wearable devices
A stretchable system that can harvest energy from human breathing and motion for use in wearable health-monitoring devices may be possible, according to an international team of researchers, led by Huanyu ''Larry'' Cheng, Dorothy Quiggle Career Development Professor in Penn State's Department of Engineering Science and Mechanics. (2020-12-08)

Health Affairs: Reprocessing single-use med devices boosts circular economy for hospitals
Regulated medical device reprocessing is an important tool in improving environmental and public health outcomes, according to a new analysis published in Health Affairs. The paper indicates that health care systems generate significant amounts of air pollution and greenhouse gas emissions, the majority of which come from the supply chain. Hospitals that have medical devices reprocessed by regulated reprocessors removed over 7,100 tons of waste, a number that could grow dramatically, according to the researchers. (2020-12-07)

To accelerate or decelerate in the light-emitting process of zinc-oxide crystals
A recent study has measured the internal quantum efficiency (IQE) of Zinc-Oxide (ZnO) crystals in both the light-emitting process and non-light-emitting process. (2020-12-06)

Ionic defect landscape in perovskite solar cells revealed
Joint research work between Chemnitz University of Technology and Technische Universit├Ąt Dresden under Chemnitz leadership reveals ionic defect landscape in metal halide perovskites -- publication in renowned journal Nature Communications (2020-12-04)

The heavier, the better -- superior stability in isotope functionalized perovskites
We discover a significantly suppressed lattice disorder in isotope functionalized perovskite MAPbI3, which is crucial for structural stability and extraordinary optoelectronic properties. (2020-12-04)

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