Results 21 to 30 of about 611,547 (259)

Spectrally Stable Blue Light-Emitting Diodes Based on All-Inorganic Halide Perovskite Films

open access: yesNanomaterials, 2022
Substantial progress has been made in perovskite light-emitting diodes (PeLEDs), but the fabrication of high-performance blue PeLEDs still remains a challenge due to its low efficiency, spectral instability and short operational lifetime.
Huidan Zhang   +8 more
doaj   +1 more source

Spectral Shifts of Nonadiabatic High-Order Harmonic Generation

open access: yesApplied Sciences, 2013
High-order harmonic generation (HHG) is a nonlinear nonperturbative process in ultrashort intense laser-matter interaction. It is the main source of coherent attosecond (1 as = 10−18 s) laser pulses to investigate ultrafast electron dynamics.
André D. Bandrauk, Xue-Bin Bian
doaj   +1 more source

Role of Bi3+ ions on structural, optical, photoluminescence and electrical performance of Cd0.9-xZn0.1BixS QDs

open access: yesSN Applied Sciences, 2021
In this work, the Cd0.9-xZn0.1BixS QDs with different compositions of Bi3+ ions (0 ≤ x ≤ 0.05) were synthesized using a facile chemical route. The prepared QDs were characterized for analyzing the structural, morphological, elemental, optical, band gap ...
A. Krishnamoorthy   +3 more
doaj   +1 more source

Effect of BaO Content on the Photoluminescence Properties of Mn2+ and Eu2+-Codoped Sr3−xBaxMgSi2O8 Phosphors

open access: yesInorganics
In this study, Mn2+ and Eu2+-codoped Sr3−xBaxMgSi2O8 (x = 0–1.5) phosphors were synthesized at 1400 °C under a reducing atmosphere composed of 5% H2 and 95% N2 to produce materials with blue light emission.
Shu-Han Liao   +3 more
doaj   +1 more source

Blue shift of CdSe/ZnS nanocrystal-labels upon DNA-hybridization

open access: yesJournal of Nanobiotechnology, 2008
Luminescence color multiplexing is one of the most intriguing benefits, which might occur by using semiconductor Quantum Dots (QDs) as labels for biomolecules.
Palme Klaus   +3 more
doaj   +1 more source

Sand-Dust Image Restoration Based on Reversing the Blue Channel Prior

open access: yesIEEE Photonics Journal, 2020
Images acquired under sand-dust weather conditions are severely degraded, with low contrast and severe color shift. The reason is that, due to the influence of sand-dust particles, light is scattered and absorbed, resulting in a blurred image and low ...
GuXue Gao   +4 more
doaj   +1 more source

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

open access: yesFEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi   +5 more
wiley   +1 more source

Blue and red shifted temperature dependence of implicit phonon shifts in graphene [PDF]

open access: yesMaterials Research Express, 2017
We have calculated the implicit shift for various modes of frequency in a pure graphene sheet. Thermal expansion and Grüneisen parameter which are required for implicit shift calculation have already been studied and reported. For this calculation, phonon frequencies are obtained using force constants derived from dynamical matrix calculated using VASP
Sarita Mann, V K Jindal
openaire   +2 more sources

Improving Peak-Wavelength Method to Measure Junction Temperature by Dual-Wavelength LEDs

open access: yesIEEE Access, 2017
In this paper, the improvement of the method measuring the junction temperature of lightemitting diodes (LEDs) has been studied experimentally. A practical method is proposed with only three measurement procedures.
Yukun Zhao   +8 more
doaj   +1 more source

Magnetic blue shift of Mott gaps enhanced by double exchange

open access: yesPhysical Review Research, 2021
A substantial energy gap of charge excitations induced by strong correlations is the characteristic feature of Mott insulators. We study how the Mott gap is affected by long-range antiferromagnetic order. Our key finding is that the Mott gap is increased
Mohsen Hafez-Torbati   +3 more
doaj   +1 more source

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