Absorption (acoustics)
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Structural absorption by barbule microstructures of super black bird of paradise feathers Open
Many studies have shown how pigments and internal nanostructures generate color in nature. External surface structures can also influence appearance, such as by causing multiple scattering of light (structural absorption) to produce a velv…
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Highly Dynamic Ligand Binding and Light Absorption Coefficient of Cesium Lead Bromide Perovskite Nanocrystals Open
Lead halide perovskite materials have attracted significant attention in the context of photovoltaics and other optoelectronic applications, and recently, research efforts have been directed to nanostructured lead halide perovskites. Collo…
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Intriguing Optoelectronic Properties of Metal Halide Perovskites Open
A new chapter in the long and distinguished history of perovskites is being written with the breakthrough success of metal halide perovskites (MHPs) as solution-processed photovoltaic (PV) absorbers. The current surge in MHP research has l…
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Anomalous absorption of electromagnetic waves by 2D transition metal carbonitride Ti <sub>3</sub> CNT <i> <sub>x</sub> </i> (MXene) Open
Shields up! Specialized conductive materials are used to shield or block electromagnetic radiation such as microwaves or radio waves to either prevent the escape of stray radiation or prevent interference from unwanted sources. Ideal mater…
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Formation of oxygen vacancies and Ti3+ state in TiO2 thin film and enhanced optical properties by air plasma treatment Open
This is the first time we report that simply air plasma treatment can also enhances the optical absorbance and absorption region of titanium oxide (TiO 2 ) films, while keeping them transparent. TiO 2 thin films having moderate doping of F…
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High-efficiency and air-stable P3HT-based polymer solar cells with a new non-fullerene acceptor Open
Solution-processed organic photovoltaics (OPV) offer the attractive prospect of low-cost, light-weight and environmentally benign solar energy production. The highest efficiency OPV at present use low-bandgap donor polymers, many of which …
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Light Absorption and Energy Transfer in the Antenna Complexes of Photosynthetic Organisms Open
The process of photosynthesis is initiated by the capture of sunlight by a network of light-absorbing molecules (chromophores), which are also responsible for the subsequent funneling of the excitation energy to the reaction centers. Throu…
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Photochemical Approaches to Complex Chemotypes: Applications in Natural Product Synthesis Open
The use of photochemical transformations is a powerful strategy that allows for the formation of a high degree of molecular complexity from relatively simple building blocks in a single step. A central feature of all light-promoted transfo…
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Synthesis and Optical Properties of Lead-Free Cesium Tin Halide Perovskite Nanocrystals Open
Metal halide perovskite crystal structures have emerged as a class of optoelectronic materials, which combine the ease of solution processability with excellent optical absorption and emission qualities. Restricting the physical dimensions…
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Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control Open
We report a colloidal synthesis approach to CsPbBr3 nanoplatelets (NPLs). The nucleation and growth of the platelets, which takes place at room temperature, is triggered by the injection of acetone in a mixture of precursors that would rem…
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Markedly enhanced absorption and direct radiative forcing of black carbon under polluted urban environments Open
Significance Although black carbon (BC) represents a key short-lived climate forcer, its direct radiative forcing remains highly uncertain. The available results from available studies of absorption enhancement of BC particles during atmos…
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Acoustic metasurface-based perfect absorber with deep subwavelength thickness Open
Conventional acoustic absorbers are used to have a structure with a thickness comparable to the working wavelength, resulting in major obstacles in real applications in low frequency range. We present a metasurface-based perfect absorber c…
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Radiative Cooling: Principles, Progress, and Potentials Open
The recent progress on radiative cooling reveals its potential for applications in highly efficient passive cooling. This approach utilizes the maximized emission of infrared thermal radiation through the atmospheric window for releasing h…
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<i>In Situ</i>/<i>Operando</i> Electrocatalyst Characterization by X-ray Absorption Spectroscopy Open
During the last decades, X-ray absorption spectroscopy (XAS) has become an indispensable method for probing the structure and composition of heterogeneous catalysts, revealing the nature of the active sites and establishing links between s…
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Photon recycling in lead iodide perovskite solar cells Open
Perovskite solar cells recycle photons Inorganic-organic perovskite solar cells are very efficient in part because the charge carriers exhibit very long path lengths. Pazos-Outón et al. show that photon recycling, as seen previously in hig…
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Recent advances in MOF-based photocatalysis: environmental remediation under visible light Open
Highly photoactive MOFs can be engineered via various strategies for the purpose of extended visible light absorption, more efficient generation, separation and transfer of charge carriers, as well as good recyclability.
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2D Covalent Organic Frameworks as Intrinsic Photocatalysts for Visible Light-Driven CO<sub>2</sub> Reduction Open
Covalent organic framework (COF) represents an emerging class of porous materials that have exhibited great potential in various applications, particularly in catalysis. In this work, we report a newly designed 2D COF with incorporated Re …
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9.2%-efficient core-shell structured antimony selenide nanorod array solar cells Open
Antimony selenide (Sb 2 Se 3 ) has a one-dimensional (1D) crystal structure comprising of covalently bonded (Sb 4 Se 6 ) n ribbons stacking together through van der Waals force. This special structure results in anisotropic optical and ele…
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Thin single crystal perovskite solar cells to harvest below-bandgap light absorption Open
The efficiency of perovskite solar cells has surged in the past few years, while the bandgaps of current perovskite materials for record efficiencies are much larger than the optimal value, which makes the efficiency far lower than the Sho…
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Oxygen K-edge X-ray Absorption Spectra Open
We review oxygen K-edge X-ray absorption spectra of both molecules and solids. We start with an overview of the main experimental aspects of oxygen K-edge X-ray absorption measurements including X-ray sources, monochromators, and detection…
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Advanced Materials Research Open
In this paper, the sound absorption properties of aluminum sponges manufactured by infiltration process have been studied.The results show that the sound absorption factor a changes in function of pore size.Additionally, the sound absorpti…
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Parity-Forbidden Transitions and Their Impact on the Optical Absorption Properties of Lead-Free Metal Halide Perovskites and Double Perovskites Open
Using density-functional theory calculations, we analyze the optical\nabsorption properties of lead (Pb)-free metal halide perovskites\n(AB$^{2+}$X$_3$) and double perovskites (AB$^+$B$^{3+}$X$_6$) (A = Cs or\nmonovalent organic ion, B$^{2…
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Infrared Plasmonic Refractive Index Sensor with Ultra-High Figure of Merit Based on the Optimized All-Metal Grating Open
A perfect ultra-narrow band infrared metamaterial absorber based on the all-metal-grating structure is proposed. The absorber presents a perfect absorption efficiency of over 98% with an ultra-narrow bandwidth of 0.66 nm at normal incidenc…
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Light-Induced Anion Phase Segregation in Mixed Halide Perovskites Open
Hybrid lead halide perovskites such as MAPbI3 (MA = CH3NH3+) and their mixed halide analogues represent an emerging class of materials for solar energy conversion. Intriguing aspects include sizable carrier diffusion lengths, large optical…
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Toward the Application of High Frequency Electromagnetic Wave Absorption by Carbon Nanostructures Open
With the booming development of electronic information technology, the problems caused by electromagnetic (EMs) waves have gradually become serious, and EM wave absorption materials are playing an essential role in daily life. Carbon nanos…
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Dual‐Peak Absorbing Semiconducting Copolymer Nanoparticles for First and Second Near‐Infrared Window Photothermal Therapy: A Comparative Study Open
Near‐infrared (NIR) light is widely used for noninvasive optical diagnosis and phototherapy. However, current research focuses on the first NIR window (NIR‐I, 650–950 nm), while the second NIR window (NIR‐II, 1000–1700 nm) is far less expl…
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Hydrogen Sulfide Capture: From Absorption in Polar Liquids to Oxide, Zeolite, and Metal–Organic Framework Adsorbents and Membranes Open
Hydrogen sulfide removal is a long-standing economic and environmental challenge faced by the oil and gas industries. H2S separation processes using reactive and non-reactive absorption and adsorption, membranes, and cryogenic distillation…
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Chiroptical Properties in Thin Films of π-Conjugated Systems Open
Chiral π-conjugated molecules provide new materials with outstanding features for current and perspective applications, especially in the field of optoelectronic devices. In thin films, processes such as charge conduction, light absorption…
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A New Family of Ultralow Loss Reversible Phase‐Change Materials for Photonic Integrated Circuits: Sb<sub>2</sub>S<sub>3</sub> and Sb<sub>2</sub>Se<sub>3</sub> Open
Phase‐change materials (PCMs) are seeing tremendous interest for their use in reconfigurable photonic devices; however, the most common PCMs exhibit a large absorption loss in one or both states. Here, Sb 2 S 3 and Sb 2 Se 3 are demonstrat…
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Dietary Curcumin: Correlation between Bioavailability and Health Potential Open
The yellow pigment curcumin, extracted from turmeric, is a renowned polyphenol with a broad spectrum of health properties such as antioxidant, anti-inflammatory, anti-cancer, antidiabetic, hepatoprotective, anti-allergic, anti-dermatophyte…