Results 111 to 120 of about 99,359 (307)

Revealing Two Operation Modes of Perovskite Light‐Emitting Diodes Through Overshoot Pulses

open access: yesAdvanced Photonics Research, EarlyView.
Short, high‐intensity overshoot pulses (OSPs) may be generated by perovskite light‐emitting diodes (PeLEDs) depending on electrical pump pulse parameters, offset and afterpulse voltages. OSPs reveal two PeLED operation modes: the recombination mode, favorable for the conventional EL but preventing OSPs, and the accumulation mode, enabling the formation
Rokas Gegevičius   +6 more
wiley   +1 more source

Using Bayesian Optimization to Increase the Efficiency of III‐V Multijunction Solar Cells

open access: yesAdvanced Theory and Simulations, EarlyView.
Technology Computer Aided Design (TCAD) modeling is crucial for designing complex optoelectronic devices like III‐V multijunction solar cells. Bayesian optimization is proposed as a robust method to address challenges in optimizing costly black‐box TCAD solvers.
Pablo F. Palacios, Carlos Algora
wiley   +1 more source

Design of CsSnBr3/Ga2O3 Hybrid Photodetectors for High UV Selectivity and Bifacial Usage

open access: yesAdvanced Theory and Simulations, EarlyView.
A numerical study investigates a lead‐free CsSnBr3/Ga2O3 p–n heterojunction photodetector, analyzing its electrical and optoelectronic performance. High illumination‐to‐dark current ratios and rectification are achieved. The device operates in self‐powered, bifacial, solar‐blind, and UV–Vis modes with strong responsivity and detectivity.
Tarak Hidouri   +3 more
wiley   +1 more source

Simulation of Carrier Injection Pathways in Axial GaN Nanowire MicroLEDs

open access: yesAdvanced Theory and Simulations, EarlyView.
This study examines how geometrical variations in the active region affect carrier injection in multiple quantum well light‐emitting diodes (LEDs) based on axial nanowires. The key role of semipolar quantum wells located at the nanowire edges is highlighted, which efficiently facilitates electron injection into the central polar quantum wells.
Amadéo Vibert   +3 more
wiley   +1 more source

The Pierre Auger Cosmic Ray Observatory [PDF]

open access: yes, 2015
A. Aab   +499 more
semanticscholar   +1 more source

Unveiling Alkali‐Induced Redox Modulation: In‐Situ Spectroscopic Insights from RWGS on Alkali‐Modified ZrO2‐Supported Cu Catalysts

open access: yesAdvanced Science, EarlyView.
Revisiting the prevailing views that alkali only enhances adsorption properties and stabilizes metal particles against sintering, this study highlights the key role of Na+ in modulating Cu redox properties. Na+ added via wet impregnation (WI) hinders Cu2+ reduction but promotes oxidation and leads to Cu site loss by sintering/coverage. In contrast, the
Abdallah I. M. Rabee   +10 more
wiley   +1 more source

Engineering Dimensional Configuration of Single‐Atom S‐Cu‐S Sites as Reversible Electron Station for Enhanced Peroxidase‐Mimicking

open access: yesAdvanced Science, EarlyView.
L‐cysteine triggers auto‐assembly of POD‐like 3D biomimetic S‐Cu‐S single‐atom nanozymes on MoS2 (MoCC). MoCC shows 16.3‐fold higher catalytic velocity and 17.9‐fold greater affinity than HRP, enabling efficient •OH generation via enhanced electron inversion and transfer.
Wenjie Ma   +12 more
wiley   +1 more source

Kinetically Controlling Surface Atom Arrangements in Thermally Robust, Amorphous High‐Entropy Alloy Nanoparticles by Solvent Selection

open access: yesAdvanced Science, EarlyView.
This work leverages the level of carbon supersaturation in the metallic constituents during particle formation to regulate nanoparticle morphology, structure, and composition distribution. The solvent‐dependent (C/(C+O)) ratio and the relative kinetics of the competing reactions of carbon shell formation, coalescence of metallic constituents, and ...
Varatharaja Nallathambi   +7 more
wiley   +1 more source

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