Articles tagged with Photoelectrons
Scientists at the University of Groningen discovered a way to harvest extra energy from 'hot electrons' in solar cells, slowing down energy loss to nanoseconds. This breakthrough could lead to more efficient solar cells, exceeding the theoretical 33% limit.
Researchers at Politecnico di Milano and CNR have developed a new ultrafast computer technology controlled by light, potentially hundreds of times faster than traditional electronics. The technology manipulates the state of electrons in matter using oscillating light, enabling operations at rates above 10 terahertz.
The study definitively resolves the controversy by capturing complete two-dimensional snapshots of electron spin and orbital shape on the Au(111) Shockley surface state. The experiment unambiguously confirms the Rashba effect, establishing a robust reference dataset for spin-resolved photoemission.
A new study provides guidelines on creating photoreactive molecules sensitive to mechanical stimuli using flexible linkers. The findings may open possibilities for highly efficient energy conversion devices and advanced medical therapies.
A team of scientists observed the earliest steps of ultrafast charge transfer in a complex dye molecule, with high-frequency vibrations playing a central role. The experiments showed that these vibrations initiate charge transport, while processes in the surrounding solvent begin only at a later stage.
Researchers developed a simple, economical and environmentally friendly purification method for mullite-type bismuth ferrite, improving its efficiency in producing green hydrogen. The process uses light and glycerol to eliminate unwanted compounds, resulting in high-purity material suitable for photoelectrochemical reactions.
For the first time, scientists have measured the quantum state of electrons ejected from atoms after absorbing high-energy light pulses. This technique provides a new way to study the interaction between light and matter, with potential applications in various fields of research.
Researchers at HZB have developed a method to precisely monitor electrochemical reactions in solid-state batteries using photoelectron spectroscopy at BESSY II. The results show that decomposition products form at interfaces, hindering lithium ion transport and reducing battery capacity with each charge cycle.
A new method for visualizing molecular orbitals has been developed, enabling scientists to analyze molecular dynamics and deformations in molecular films more easily. The technique, called PhaseLift-based photoemission orbital tomography (POT), allows for precise visualization of electronic states with a single set of measurements.
Researchers investigate how water molecules react with or on nanoparticle surfaces in aqueous solutions. They found that acidic conditions cause water molecules to split on hematite nanoparticles, while basic pH is required for anatase nanoparticles.
Scientists successfully record phase distribution of electrons, unveiling detailed structure of its complex wavefunction. The method uses attosecond laser pulse to visualize electron wavefunction in a gas.
Researchers from City University of Hong Kong and Australia developed a new method to enhance charge mobility in metal oxide catalysts, leading to improved water splitting efficiency. The method involves phosphorus doping, which reduces energy losses and increases charge separation efficiency.
Researchers have developed a new software based on artificial intelligence that can help interpret complex data. The software, called disentangled variational autoencoder network (β-VAE), uses two neural networks to compress and reconstruct data, allowing humans to understand the underlying core principle without prior knowledge.
Scientists have successfully filmed the impulsive response of bound electrons to intense XUV pulses using a new photoelectron spectroscopy. The technique provides a novel method for time-resolved imaging of ultrafast bound-state electron processes in intense laser fields.
Researchers at KAUST have discovered that the energy level alignment between donor and acceptor components in organic solar cells is crucial for device performance. Contrary to current belief, blends with little to no difference in one energy level metric were found to be poor performers.
Researchers have made significant advancements in understanding the electronic structure of graphite, a crucial component in battery production. The study's findings highlight the importance of surface effects in bulk intrinsic electronic state measurements, revealing new insights into the material's electrical properties.
Scientists successfully measured the attosecond-scale Wigner time delay in molecular photoionization, providing insights into the timing of the photoemission process. The 'double-pointer attoclock' scheme was used to disentangle the orientation-dependent behavior of molecular Coulomb interaction and molecular orbital structure.
Researchers developed a hot-carrier multijunction solar cell that maintains high conversion efficiency with nonoptimal materials, expanding the scope of candidate designs. The novel architecture showed superior resilience to design imperfections, widening the range of suitable materials and operating conditions.
Researchers developed an approach to measure the orbital angular momentum of intense vortex pulses using photoelectron momentum imaging via strong-field photoionization. They successfully characterized three different OAM modes and proposed a universal scheme for higher OAM detection, with minimal influence on the OAM states.
Researchers from Tokyo University of Science developed a high-quality crystalline interface using quasi-homo-epitaxial growth, which eliminated mobility issues and enabled spontaneous electron transfer. This breakthrough could lead to highly efficient flexible solar cells and wearable electronic devices.
Scientists from the University of Tsukuba directly observed electron dynamics in organic film OLEDs, revealing a previously unknown feature of exciton decay. The study's findings may contribute to the development of more efficient OLED-based products.
Researchers at Linköping University discovered that XPS can give misleading analysis results due to an erroneous assumption during calibration. This error has led to the publication of interpretations of data in conflict with basic physics, raising concerns about research credibility.
Physicists used attosecond pulses to study tungsten crystals' photoelectron emission dynamics. The results show that electrons from neighboring energy states in the valence band differ by tens of attoseconds in their response times.
Physicists have created a new method to study previously invisible quantum states of electrons using optical vortices. By combining conventional laser beams with swirls of light, researchers can detect the properties of emitted photoelectrons and gain insights into material structure and interaction with light.
Scientists have successfully mapped the electrolyte-to-metal transition in alkali metal-liquid ammonia solutions, revealing the formation of a conduction band with sharp Fermi edges. This study provides a detailed molecular picture of metallic behavior and could lead to the preparation of metallic water.
A new momentum microscope has been built at BL6U of UVSOR, enabling direct observation of Fermi surface and band structure of µm-sized targets. The device achieves spatial resolution of 50 nm for microscopy measurement and resolves photoelectron spectra in both real space and momentum space.
A team of researchers at Technical University of Munich has developed a new method to measure the time between X-ray photon absorption and electron emission. The study reveals that photoelectrons can be generated in around 40 attoseconds, which is twice as fast as expected. This breakthrough could lead to advancements in photocathodes ...
Researchers successfully improved an ambient-pressure photoelectron spectroscopy instrument using hard X-rays to measure samples under real atmospheric pressure for the first time. This achievement broadens the range of applications for photoelectron spectroscopy, enabling direct examination of reactions between solids and gases.
Researchers have developed a method to observe the structure of molecules and track changes within attosecond timescales. By using tunneling ionization and ultrashort laser pulses, scientists can measure electron interference patterns, providing insight into molecular configurations.
Researchers developed a new X-ray spectroscopy technique called SWAPPS, combining standing-wave and ambient-pressure photoelectron spectroscopy to study heterogeneous interfaces with sub-nanometer resolution. This allows for the measurement of elemental and chemical composition with enhanced sensitivity in narrow interfacial regions.
Scientists have found a way to flip the spin polarization of electrons emitted from topological insulators by controlling the polarization of the incident light. This discovery opens up new possibilities for studying and manipulating electronic states in these materials.
Researchers create technique to measure temporal profile and arrival time of individual FEL pulses with femtosecond precision, allowing for precise study of atomic, molecular, and solid-state systems. The method enables filming of atoms in motion and exploration of processes that evolve within X-ray exposure.
Researchers develop new X-ray technique HARPES to study electronic structures below material surfaces, enabling better performance in nanoscale devices. The technique uses hard x-rays to probe deeper into materials than current ARPES methods.
Researchers used ambient-pressure XPS to examine every feature of a working solid oxide electrochemical cell, operating in an atmosphere of hydrogen and water vapor at high temperatures. This allowed for direct measurement of local chemical states and electric potentials at surfaces and interfaces during the cell's operation.
Scientists developed a high-pressure photoelectron spectroscopy system to study chemical underpinnings of everyday catalytic, biological, and ecological phenomena. They found that negatively charged ions concentrate at the surface of salt grains as they dissolve in water.