Results 81 to 90 of about 103,476 (250)
Locating the atoms at the hard-soft interface of gold nanoparticles
Nature CommunicationsSurface structure affects the growth, shape and properties of nanoparticles. In wet chemical syntheses, metal additives and surfactants are used to modify surfaces and guide nanocrystal growth. To understand this process, it is critical to understand how
Weilun Li +13 more
doaj +1 more source
New Journal of Physics, 2018 We present systematic studies of the transient dynamics of GaAs by ultrafast time-resolved reflectivity. In photoexcited non-equilibrium states, we found a sign reverse in reflectivity change Δ R / R , from positive around room temperature to negative at
X C Nie +8 more
doaj +1 more source
Coherent optical writing and reading of the exciton spin state in single quantum dots
, 2011 We demonstrate a one to one correspondence between the polarization state of a light pulse tuned to neutral exciton resonances of single semiconductor quantum dots and the spin state of the exciton that it photogenerates.
Benny, Y. +7 more
core +1 more source
Exciton-Exciton and Exciton-Photon Annihilation in Polaritonic Systems
8 pages, 4 ...
Philipp, Luca Nils +2 more
openaire +2 more sources
Atomic Layer Deposition in Transistors and Monolithic 3D Integration
Advanced Functional Materials, EarlyView.Transistors are fundamental building blocks of modern electronics. This review summarizes recent progress in atomic layer deposition (ALD) for the synthesis of two‐dimensional (2D) metal oxides and transition‐metal dichalcogenides (TMDCs), with particular emphasis on their enabling role in monolithic three‐dimensional (M3D) integration for next ...
Yue Liu +5 more
wiley +1 more source
CrystalsZinc oxide (ZnO) thin films were deposited by radio-frequency reactive magnetron sputtering at a cryogenic substrate temperature of −78 °C to explore a novel low-thermal-budget route for semiconductor growth.
M. A. Ebdah +7 more
doaj +1 more source
New Journal of Physics, 2014 Excitons in high-purity crystals of Cu _2 O undergo a density-dependent lifetime that opposes Bose–Einstein condensation (BEC). This rapid decay rate of excitons at a density n has generally been attributed to Auger recombination having the form ${\rm d ...
James P Wolfe, Joon I Jang
doaj +1 more source
Polymer Network Modified Perovskite for High‐Performance Pure Blue Light‐Emitting Diodes
Advanced Functional Materials, EarlyView.A polymer network of poly(4‐vinylphenol) (PVPh) is introduced to improve pure blue perovskite light‐emitting diodes. PVPh effectively passivates defects, enhances film morphology, reduces lattice strain, and suppresses ion migration. These effects lead to record device performance, achieving 9.82% external quantum efficiency and stable blue emission at
Zhongkai Yu +11 more
wiley +1 more source
Modulation of delayed fluorescence pathways via rational molecular engineering
Nature CommunicationsOne of the key challenges in developing efficient organic light-emitting diodes (OLEDs) is overcoming the loss channel of triplet excitons. A common approach to mitigate these losses to enhance the external quantum efficiency of OLEDs is employing ...
Sanchari Debnath +7 more
doaj +1 more source
East European Journal of PhysicsThe presence of the effect of thermally activated delayed fluorescence (TADF) in organic light-emitting materials (emitters), manifested in the "collecting" of triplet excitons in organic semiconductor complexes that do not contain noble metals, creates ...
Serhii Melnykov +3 more
doaj +1 more source