Results 61 to 70 of about 4,752 (297)

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

Advanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

Variations in differential rotation and meridional flow within the Sun’s surface shear layer 1996–2022

Frontiers in Astronomy and Space Sciences, 2022
We measure differential rotation and meridional flow in the Sun’s surface shear layer by tracking the motions of the magnetic network seen in magnetograms from SOHO/MDI and SDO/HMI over solar cycles 23, 24, and the start of 25 (1996–2022). We examine the
David H. Hathaway, Lisa A. Upton, Sushant S. Mahajan   +2 more
doaj   +1 more source

Leaftronics: Bio‐Fractal Scaffolds From Leaf Venation for Low‐Waste Electronics

Advanced Materials, EarlyView.
“Leaftronics” transforms naturally evolved leaf venation into quasi‐fractal scaffolds for sustainable electronics. Polymer‐infiltrated leaf skeletons can be used to fabricate ultra‐smooth, reflow‐ and thin‐film‐compatible decomposable substrates, while making the same lignocellulose networks conducting results in flexible transparent electrodes.
Rakesh Rajendran Nair, Hrisheekesh Thachoth Chandran, Karl Leo, Hans Kleemann   +3 more
wiley   +1 more source

Stellar differential rotation and coronal time-scales

, 2014
GPSG would like to thank the STFC for financial support. DHM would like to thank the STFC and the Leverhulme Trust for financial support.We investigate the time-scales of evolution of stellar coronae in response to surface differential rotation and ...
Jardine, Moira Mary, Gibb, Gordon Peter Samuel, Mackay, Duncan Hendry   +2 more
core   +1 more source

A Study of Long-Term Solar Activity at 37 GHz

Open Astronomy, 2012
In this paper we investigate the solar activity at the radio frequency (37 GHz) using an extensive data series (solar radio maps) from the Metsähovi Radio Observatory.
Kallunki J., Lavonen N., Järvelä E., Uunila M.   +3 more
doaj   +1 more source

Programmable 3D Photovoltaics via Mechanically Origami‐Coded Interlocked 3D Kirigami and Nano‐Root Anchored AgNWs–In–Ga Multiphasic Alloy Conductor

Advanced Materials, EarlyView.
Mechanically origami‐coded 3D kirigami photovoltaics convert a single extension–release cycle into deterministic self‐folding, reconfiguring planar solar cells into programmable 3D modules. Distinct coding strategies enable either ultrahigh stretchability (500% system strain) or ultrahigh initial effective areal coverage (225%).
Seok Joon Hwang, Jiwon Ryu, Byungsoo Kang, Injong Oh, Dae‐Hee Cho, YoungHoi Cho, Seung S. Lee, Dong Hoe Kim, Deokjae Choi, Gee Yeong Kim, Heesuk Jung, Taehee Kim, Hyeonggeun Yu, Seungjun Chung, Byoung Koun Min, Phillip Lee   +15 more
wiley   +1 more source

Differential rotation on both components of the pre-main-sequence binary system HD 155555 [PDF]

, 2008
We present the first measurements of surface differential rotation on a pre-main-sequence binary system. Using intensity (Stokes I) and circularly polarized (Stokes V) time-series spectra, taken over 11 nights at the Anglo-Australian Telescope (AAT), we ...
Velez, J. C. Ramirez, Barnes, J.R, Ramirez Velez, J.C., Barnes, J. R., Dunstone, N.J., Hussain, G. A. J., Dunstone, Nicholas James, Donati, J. -F., Jardine, M., Donati, J.-F., Dunstone, N. J., Hussain, G.A.J., Collier Cameron, A., Barnes, J.R., Donati, J-F., Ramirez Velez, J. C., Cameron, A. Collier, Marsden, S. C., Ramirez Vlex, J.C., Marsden, S.C.   +19 more
core   +1 more source

Phase Engineering of Atomically Precise Nanoclusters (APNCs) of Gold and Beyond

Advanced Materials, EarlyView.
Engineering the structural phase of materials is of paramount importance for both fundamental research and practical applications. In this Review, we summarize the recent progress in controlling the phases of atomically precise nanoclusters (APNCs) of gold, silver and copper, as well as bimetallic systems. The phase‐enabled material properties of APNCs
Yitong Wang, Avirup Sardar, Weijie Ji, Zhongyu Liu, Rongchao Jin   +4 more
wiley   +1 more source

Differential rotation of solar

Context. Differential rotation is a key driver of magnetic activity and dynamo processes in the Sun and other stars, especially as the rate differs across the solar layers, and also in active regions. Aims.
Alexander G. M. Pietrow, Ioannis Kontogiannis, Horst Balthasar, Carsten Denker, Hritam Chakraborty, Monika Lendl, Meetu Verma, Emily Joe Lößnitz   +7 more
core   +1 more source

Time-dependent Dynamics of the Corona

The Astrophysical Journal Letters, 2023
We present in this Letter the first global comparison between traditional line-tied steady-state magnetohydrodynamic models and a new, fully time-dependent thermodynamic magnetohydrodynamic simulation of the global corona. To approximate surface magnetic
Emily I. Mason, Roberto Lionello, Cooper Downs, Jon A. Linker, Ronald M. Caplan, Marc L. DeRosa   +5 more
doaj   +1 more source