Results 171 to 180 of about 844,582 (367)

Transport Resistance Dominates the Fill Factor Losses in Record Organic Solar Cells

open access: yesAdvanced Energy Materials, EarlyView.
Organic photovoltaics are a promising solar cell technology, but even the record devices with 20% efficiency have significant fill factor losses due to low active layer conductivities. In this Perspective, the authors describe the origin of these losses, discuss experimental methods for their quantification, and explain how to minimize them to optimize
Chen Wang   +6 more
wiley   +1 more source

Optimization of Adsorption Sites for Selective Hydrobenzoin and Syngas Production in a Single Photoredox Cycle

open access: yesAdvanced Energy Materials, EarlyView.
Efficient C─C coupling hydrobenzoin production and tunable syngas generation via benzyl alcohol oxidation and CO2 reduction is realized by Ni2P/CdS composite in a single photoredox cycle. In situ and ex situ characterizations, along with theoretical calculations, reveal that the active site optimization facilitates intermediate formation and desorption.
Jian Lei   +6 more
wiley   +1 more source

Sobre la electrodinámica de los cuerpos en movimiento

open access: yesMemoria Investigaciones en Ingeniería, 2005
Es bien conocido que la electrodinámica de Maxwell—como se le entiende usualmente en la actualidad—aplicada a los cuerpos en movimiento, conduce a asimetrías que no parecen ser inherentes a los fenómenos.
Albert Einstein
doaj  

The Effect of Pore Functionality in Multicomponent Covalent Organic Frameworks on Stable Long‐Term Photocatalytic H2 Production

open access: yesAdvanced Energy Materials, EarlyView.
Five COFs are synthesized through a multicomponent reaction, preserving a similar backbone while introducing varying pore functionalities. All COFs demonstrate excellent chemical stability and sustained H2 production under sunlight for 7‐15 days. The imidazole‐functionalized COF exhibits the highest H2 production, which can be attributed to its high ...
Prasenjit Das   +18 more
wiley   +1 more source

Einstein and the Quantum

open access: yes, 2006
We review here the main contributions of Einstein to the quantum theory. To put them in perspective we first give an account of Physics as it was before him. It is followed by a brief account of the problem of black body radiation which provided the context for Planck to introduce the idea of quantum.
openaire   +3 more sources

Evaluation and Characterization of SEI Composition in Lithium Metal and Anode‐Free Lithium Batteries

open access: yesAdvanced Energy Materials, EarlyView.
This article emphasizes the pivotal role of solid electrolyte interphase (SEI) stability in enhancing the performance of lithium‐metal and anode‐free batteries. It illustrates how innovative additives, fluorinated electrolytes, and in situ methods improve SEI conductivity, durability, and its development under real‐world conditions.
Karthik Vishweswariah   +5 more
wiley   +1 more source

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