Achieving perovskite-based high–color purity blue-emitting light-emitting diodes (LEDs) is still challenging. Here, we report successful synthesis of a series of blue-emissive two-dimensional Ruddlesden-Popper phase single crystals and their high–color purity blue-emitting LED demonstrations. Although this approach successfully achieves a series of bandgap emissions based on the different layer thicknesses, it still suffers from a conventional temperature-induced device degradation mechanism dur... Science Magazine · 1 month
Excitons in 2D perovskites for ultrafast terahertz photonic devices  Science Magazine · 6 days
In recent years, two-dimensional (2D) Ruddlesden-Popper perovskites have emerged as promising candidates for environmentally stable solar cells, highly efficient light-emitting diodes, and resistive memory devices. The remarkable existence of self-assembled... more
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The electronics industry might look very different today were it not for the dramatic drop in cost of high-quality single-crystalline silicon wafers over the past five decades. So what would happen if the cost... more
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Researchers at the University of Cambridge have developed a novel technique for generating single photons, by moving single electrons in a specially designed light-emitting diode (LED). This technique, reported in... more
Researchers realize two-photon pumped nanolaser from formamidinium perovskites  PHYS.ORG · 2 weeks
Formamidinium (FA) perovskites have exhibited outstanding optoelectronic properties in efficient solar cells and light-emitting diodes. However, their development on nanolaser application has rarely been explored, especially the up-conversion lasing performance. more
Perovskites reveal huge resettable single-photon response  PHYS.ORG · 1 week
Despite the progress in perovskite device efficiencies, these systems are not fully understood, in particular the frequency- and power-dependence of their response to light. Yu-Hwa Lo and colleagues at the University of California in San Diego... more
Low-frequency lattice phonons in halide perovskites explain high defect tolerance toward electron-hole recombination  Science Magazine · 2 weeks
Low-cost solution-based synthesis of metal halide perovskites (MHPs) invariably introduces defects in the system, which could form Shockley-Read-Hall (SRH) electron-hole recombination centers... more
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Organic-inorganic metal halide perovskites have emerged as a promising optoelectronic material with exceptional structure and property tunability. This new generation of functional materials possess excellent properties such as large optical absorption, long carrier diffusion length, high carrier mobility, and low-cost... more
Dry reforming of methane by stable Ni-Mo nanocatalysts on single-crystalline MgO  Science Magazine · 2 weeks
Large-scale carbon fixation requires high-volume chemicals production from carbon dioxide. Dry reforming of methane could provide an economically feasible route if coke- and sintering-resistant catalysts were... more
Ultrasensitive and ultrathin phototransistors and photonic synapses using perovskite quantum dots grown from graphene lattice  Science Magazine · 2 weeks
Organic-inorganic halide perovskite quantum dots (PQDs) constitute an attractive class of materials for many optoelectronic applications. However, their... more
New graphene-based metasurface capable of independent amplitude and phase control of light  SCIENCE DAILY · 1 week
Researchers described a new strategy of designing metamolecules that incorporates two independently controllable subwavelength meta-atoms. This two-parametric control of the metamolecule secures the complete... more
New graphene-based metasurface capable of independent amplitude and phase control of light  PHYS.ORG · 1 week
Researchers described a new strategy of designing metamolecules that incorporates two independently controllable subwavelength meta-atoms. This two-parametric control of the metamolecule secures the complete... more
New graphene-based metasurface capable of independent amplitude and phase control of light  nanowerk · 1 week
Researchers describe a new strategy of designing metamolecules that incorporates two independently controllable subwavelength meta-atoms. This two-parametric control of the metamolecule secures the complete... more
Intelligent control of mode-locked femtosecond pulses by time-stretch-assisted spectral analysis  PHYS.ORG · 1 week
Researchers in China led by Lilin Yi at Shanghai Jiao Tong University developed apparatus and software algorithms allowing automatic 'intelligent control' over the femtosecond pulses generated by mode-locked... more
Researchers discover new way to control the phase of light using 2D materials  nanowerk · 1 day
Researchers use atomically thin materials to manipulate the phase of light without changing its amplitude, at extremely low power loss; could enable... more
New way to control the phase of light using 2D materials  SCIENCE DAILY · 3 days
Physicists have announced that they have discovered a new way to control the phase of light using 2D materials -- atomically thin materials 1/100,000 the size... more
The 'electronic Griffiths phase' in solid-state physical systems  PHYS.ORG · 2 weeks
Most theories of solid state and soft matter physics were developed independently; thus, a few physical concepts are applicable to both. Recent research, however, particularly a study by Elbio Dagotto, found that... more
Scientists develop safer lead-based perovskite solar cell  SCIENCE DAILY · 1 week
Researchers are reporting on a potential breakthrough in the development of hybrid perovskite solar cells. The scientists developed a technique to sequester the lead used to make perovskite solar cells and minimize potential toxic... more
Defects add color to quantum systems  SCIENCE DAILY · 3 days
Researchers are investigating light-emitting defects in materials that may someday form the basis of quantum-based technologies, such as quantum computers, quantum networks or engines that run on light. Once understood, these defects can become controllable features. more
Defects add color to quantum systems  nanowerk · 3 days
Researchers are investigating light-emitting defects in materials that may someday form the basis of quantum-based technologies, such as quantum computers, quantum networks or engines that run on light. Once understood, these defects can become controllable features. more
Building ultrasensitive and ultrathin phototransistors and photonic synapses using hybrid superstructures  PHYS.ORG · 1 day
Organic-inorganic halide perovskite quantum dots (PQDs) form an attractive class of materials for optoelectronic applications. Their charge transport properties are, however, inferior compared to materials such... more
Blue light illuminates key ALS pathologies in zebrafish  NEWS MEDICAL · 1 day
A joint research group in Japan has succeeded in reproducing key ALS symptoms in a small tropical fish by remote controlling a disease-associated protein molecule using light illumination. more
Cracks in perovskite films for solar cells easily healed, study finds  PHYS.ORG · 2 weeks
A new study reveals good news for the possibility of using perovskite materials in next-generation solar cells. more
Distinct sensitivity to spectrotemporal modulation supports brain asymmetry for speech and melody  Science Magazine · 2 hours
Does brain asymmetry for speech and music emerge from acoustical cues or from domain-specific neural networks? We selectively filtered temporal or spectral modulations in... more
Researchers report on helical soft-X-ray beams  PHYS.ORG · 1 week
Controlling the properties of light is of great importance for many areas of physics, including imaging and nanolithography. But for short wavelengths, such as soft X-ray radiation, such control over the phase of light has remained... more
Bright magnetic dipole radiation from two-dimensional lead-halide perovskites  Science Magazine · 3 weeks
Light-matter interactions in semiconductors are uniformly treated within the electric dipole approximation; multipolar interactions are considered "forbidden." We experimentally demonstrate that this approximation inadequately describes light emission in two-dimensional (2D) hybrid organic-inorganic... more
Researchers study how structural variations in the genome can lead to cancer  NEWS MEDICAL · 3 weeks
Structural variations in genomes can arise from deleting, amplifying, or reordering genomic segments ranging from a few thousand letters of the genetic code to... more
Experimental characterization of fragile topology in an acoustic metamaterial  Science Magazine · 2 weeks
Symmetries crucially underlie the classification of topological phases of matter. Most materials, both natural as well as architectured, possess crystalline symmetries. Recent theoretical works unveiled that these crystalline symmetries can... more
Electron-hole recombination mechanism in halide perovskites  PHYS.ORG · 3 days
A research team led by Prof. Zhao Jin from Department of Physics, University of Science and Technology of China (USTC) of the Chinese Academy of Sciences found low-frequency lattice phonons in halide perovskites resulting in high... more
Blue Origin to test lunar lander engine at Air Force lab  SPACE NEWS · 4 weeks
Blue Origin will perform tests of the engine it is developing for its Blue... more
New compendium on cardiomyopathies  NEWS MEDICAL · 1 week
Cardiomyopathy refers to diseases of the heart muscle causing cardiac myocyte injury and myocardial dysfunction, which impair structural and functional ventricular filling or ejection of blood in the absence of other structural or vascular heart diseases. more
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