Results 171 to 180 of about 177,535 (359)

Doping/Alloying Pathways to Lead‐Free Halide Perovskites with Ultimate Photoluminescence Quantum Yields

open access: yesAngewandte Chemie International Edition, Volume 62, Issue 3, January 16, 2023., 2023
Lead‐free halide perovskites emit broadband visible photoluminescence originating from self‐trapped excitonic states. Introduction of “alien” metals via doping or alloying into perovskite matrices often results in a dramatic enhancement of both light absorbance and emission.
Oleksandr Stroyuk   +3 more
wiley   +1 more source

Astronomy's relationship with the lands and communities of Maunakea [PDF]

open access: yesProc. SPIE 13094-47 (2024)
Astronomy is at a turning point in its history and in its relations with the Indigenous peoples who are the generational stewards of land where several of our main observatories are located. The controversy regarding the further development of astronomy facilities on Maunakea is probably the most significant and publicized conflict about the use of ...
arxiv  

Chromosome‐Level Genome Assembly of the Leafcutter Bee Megachile rotundata Reveals Its Ecological Adaptation and Pollination Biology

open access: yesAdvanced Science, EarlyView.
The genome of Megachile rotundata, an extensively managed solitary pollination bee species, has been sequenced, covering 280.68 Mb and predicting 10 701 genes. The study reveals significant expansions of the Toll gene family and their abundant expression in diapause prepupae, highlighting enhanced immune responses during diapause. This genome serves as
Rangjun Shi   +8 more
wiley   +1 more source

Echocardiographic screening of schoolchildren in American Samoa to detect rheumatic heart disease: a feasibility study

open access: yesPediatric Health, Medicine and Therapeutics, 2011
Shawn S Barnes1 James Sim2 James R Marrone3 Venudhar D Reddy2 Darragh C O’Carroll1 Lauren Sumida1 Guliz Erdem21John A Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA; 2Department of Pediatrics, John A Burns School of ...
Shawn S Barnes   +3 more
doaj  

High‐Entropy Non‐Flammable Ionic Liquid/Dimethoxymethane Composite Electrolyte for High‐Performance Lithium‐Ion Batteries

open access: yesAdvanced Science, EarlyView.
An ionic liquid/ether composite high‐entropy electrolyte with a unique Li+ coordination structure that leads to an upgraded solid‐electrolyte interphase and improved Li+ desolvation kinetics is developed. It exhibits high thermal stability, negligible corrosivity, and a large potential window, and is highly compatible with graphite, SiOx, and high ...
Purna Chandra Rath   +8 more
wiley   +1 more source

Constructing High‐Performance Inverted Perovskite Solar Cells Using Chiral Organic Molecules

open access: yesAdvanced Science, EarlyView.
This study presents a strategy for passivating defects at perovskite interfaces using chiral molecules. A comparison between the chiral R‐, S‐, and rac‐MBACl molecules reveals that S‐MBACl exhibits the strongest chelating ability and defect passivation effect on the perovskite surface. Finally, PSCs based on S‐MBACl modification achieve a PCE of 24.07%.
Zixuan Shang   +7 more
wiley   +1 more source

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