Results 81 to 90 of about 47,512 (262)

Emerging 2D Ferroelectric Semiconductors: From Fundamentals to Advanced Device Applications

open access: yesAdvanced Science, EarlyView.
This review highlights the emerging field of two‐dimensional ferroelectric semiconductors, focusing on their quantum‐scale polarization mechanisms, material innovations, and diverse device applications. It also summarizes key challenges and outlines future directions, including strain and twist‐angle engineering, quantum coupling, and flexible ...
Mengshuang Chi   +6 more
wiley   +1 more source

Mechanism of Anomalous Anisotropic Colossal Magnetoresistance in Quasi‐2D Mn3Si2Te6 Bulk Single Crystal

open access: yesAdvanced Science, EarlyView.
The external field exceeds Hd, the speed polarization abruptly reorients to align with the Mn magnetic moments, leading to an MR ≈ −100%. Abstract Mn3Si2Te6, quasi‐2D ferrimagnetic semiconductor, exhibits anomalous saturated colossal magnetoresistance (CMR) only when a magnetic field is applied along its magnetic hard magnetization axis, suggesting ...
Shiqi Li   +10 more
wiley   +1 more source

Advancing Energy Materials by In Situ Atomic Scale Methods

open access: yesAdvanced Energy Materials, Volume 15, Issue 11, March 18, 2025.
Progress in in situ atomic scale methods leads to an improved understanding of new and advanced energy materials, where a local understanding of complex, inhomogeneous systems or interfaces down to the atomic scale and quantum level is required. Topics from photovoltaics, dissipation losses, phase transitions, and chemical energy conversion are ...
Christian Jooss   +21 more
wiley   +1 more source

Langmuir‐Type Build‐Up of Self‐Generated Interlayers in Organic Solar Cells

open access: yesAdvanced Energy Materials, EarlyView.
Metal‐induced migration of polyethylene glycol (PEG) oligomer additives to Al contacts follows a Langmuir‐like adsorption behavior forming interfacial dipole layers. Consistent Voc‐concentration trends across various additives in two distinct organic solar cell systems demonstrate the generality of the phenomenon.
Jane Vinokur   +7 more
wiley   +1 more source

Traps, Tail States and Their Consequences on the Open‐circuit Voltage in Organic Solar Cells

open access: yesAdvanced Energy Materials, EarlyView.
It is found that the light‐intensity dependent low‐temperature roll‐off of open‐circuit voltage in organic solar cells is explained by the intrinsic disorder in these devices, which can be either described by the full Gaussian density of states or approximated by a two‐level system, which allows for a more intuitive interpretation.
Tobias Krebs   +2 more
wiley   +1 more source

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

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