scholarly journals Toward white light emission from plasmonic-luminescent hybrid nanostructures

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Pilar Gomez-Rodriguez ◽  
Esther Soria ◽  
Yu Jin ◽  
Andrés Caño ◽  
Irene Llorente ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
White Light ◽  
Light Emission ◽  
Spectral Response ◽  
Building Blocks ◽  
Hybrid Nanostructures ◽  
Europium Oxide ◽  
Ag Nps ◽  
Pl Emission ◽  
The Eu

Abstract We study the light emission of plasmonic-luminescent hybrid nanostructures consisting of Ag nanoparticles (NPs) embedded in europium oxide (EuOX). The Ag NPs present a bidimensional organization in the nanostructures and they optically behave as oblate spheroids. The photoluminescence (PL) spectral response of the nanostructures evolves from a narrow red emission characteristic of Eu3+ ions in absence of Ag NPs to a broad blue-green emission band associated with Eu2+ ions when the layer of Ag NPs is present. This behavior is not related to a change in the Eu2+/Eu3+ ratio, which is verified by compositional analysis. Instead, a detailed investigation of the PL emission of the nanostructures suggests that the coupling of the Ag NPs to the Eu2+ ions present in the EuOX layer, which manifests itself in an efficient sensitization of these ions, enhances their broad visible emission. In particular, the longitudinal mode of the Ag NPs surface plasmon is considered to be responsible for the efficient energy transfer for the non-normal incidence excitation PL configuration used. Finally, the use of a capping amorphous Al2O3 layer allows improving the robustness of hybrid nanostructures and further enhances their PL emission. These findings provide a new path to actively control the selective excitation of Eu2+ and Eu3+ ions via a controlled coupling with the surface plasmon resonance modes of the Ag NPs and points to these nanostructures as promising building blocks for the development of integrable white light sources.

Influence of synthesis conditions on the morphologies of ReBO3 microstructures and white light emission of YBO3:Eu3+ phosphors prepared by an oleic acid-assisted hydrothermal method

RSC Advances ◽  
2016 ◽  
Vol 6 (73) ◽  
pp. 69442-69453 ◽  
Author(s):  
Baobao Liu ◽  
Xiuzhen Xiao ◽  
Jun Yu ◽  
Dongsen Mao ◽  
Guanzhong Lu
Keyword(s):  
Oleic Acid ◽  
Hydrothermal Method ◽  
White Light ◽  
Light Emission ◽  
Dopant Concentration ◽  
White Light Emission ◽  
Excitation Wavelength ◽  
Synthesis Conditions ◽  
Light Color ◽  
The Eu

YBO3:5%Eu3+ phosphor prepared by the OA-assisted hydrothermal method displays the white color under excitation at 394 nm, and the light color of YBO3:Eu3+ can be varied with the Eu3+ dopant concentration or the excitation wavelength.

W-shaped 1,3-di(2,4-dicarboxyphenyl)benzene based lanthanide coordination polymers with tunable white light emission

2016 ◽  
Vol 40 (12) ◽  
pp. 10440-10446 ◽  
Author(s):  
Liming Fan ◽  
Weiliu Fan ◽  
Bin Li ◽  
Xian Zhao ◽  
Xiutang Zhang
Keyword(s):  
Coordination Polymers ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Lanthanide Coordination Polymers ◽  
The Eu

A series of trinuclear LnCPs with unprecedented (3,8)-connected 3D (4.52)2(42.512.66.75.83) architectures were synthesized. White light emission was realized by the Eu(iii)-doped Dy(iii) complexes.

scholarly journals White-Light-Emitting Supramolecular Polymer Gel Based on β-CD and NDI Host-Guest Inclusion Complex

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2762
Author(s):  
Srayoshi Roy Chowdhury ◽  
Sujay Kumar Nandi ◽  
Sahabaj Mondal ◽  
Santosh Kumar ◽  
Debasish Haldar
Keyword(s):  
Inclusion Complex ◽  
White Light ◽  
Light Emission ◽  
Uv Light ◽  
Loss Modulus ◽  
Building Blocks ◽  
Supramolecular Polymer ◽  
Polymer Gel ◽  
Sem Images ◽  
X Ray Crystallography

Supramolecular polymer formed by non-covalent interactions between complementary building blocks entraps solvents and develops supramolecular polymer gel. A supramolecular polymer gel was prepared by the heating-cooling cycle of β-cyclodextrin (β-CD) and naphthalenedimide (NDI) solution in N,N-dimethylformamide (DMF). The host-guest inclusion complex of β-CD and NDI 1 containing dodecyl amine forms the supramolecular polymer and gel in DMF. However, β-CD and NDI 2, having glutamic acid, fail to form the supramolecular polymer and gel under the same condition. X-ray crystallography shows that the alkyl chains of NDI 1 are complementary to the hydrophobic cavity of the two β-CD units. From rheology, the storage modulus was approximately 1.5 orders of magnitude larger than the loss modulus, which indicates the physical crosslink and elastic nature of the thermo-responsive gel. FE-SEM images of the supramolecular polymer gel exhibit flake-like morphology and a dense flake network. The flakes developed from the assembly of smaller rods. Photophysical studies show that the host-guest complex formation and gelation have significantly enhanced emission intensity with a new hump at 550 nm. Upon excitation by a 366 nm UV-light, NDI 1 and β-CD gel in DMF shows white light emission. The gel has the potential for the fabrication of organic electronic devices.

Simple and Efficient Generation of White Light Emission From Organophosphorus Building Blocks

2009 ◽  
Vol 19 (22) ◽  
pp. 3625-3631 ◽  
Author(s):  
Carlos Romero-Nieto ◽  
Stefan Durben ◽  
Ila M. Kormos ◽  
Thomas Baumgartner
Keyword(s):  
White Light ◽  
Light Emission ◽  
Building Blocks ◽  
White Light Emission ◽  
Efficient Generation

A Highly Crystalline Anthracene-Based MOF-74 Series Featuring Electrical Conductivity and Luminescence

2019 ◽  
Author(s):  
Patricia Scheurle ◽  
Andre Mähringer ◽  
Andreas Jakowetz ◽  
Pouya Hosseini ◽  
Alexander Richter ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Metal Ions ◽  
Light Emission ◽  
Block Design ◽  
High Surface ◽  
Visible Spectrum ◽  
Building Blocks ◽  
Divalent Metal Ions ◽  
Conductivity Enhancement ◽  
Surface Areas

Recently, a small group of metal-organic frameworks (MOFs) has been discovered featuring substantial charge transport properties and electrical conductivity, hence promising to broaden the scope of potential MOF applications in fields such as batteries, fuel cells and supercapacitors. In combination with light emission, electroactive MOFs are intriguing candidates for chemical sensing and optoelectronic applications. Here, we incorporated anthracene-based building blocks into the MOF-74 topology with five different divalent metal ions, that is, Zn2+, Mg2+, Ni2+, Co2+ and Mn2+, resulting in a series of highly crystalline MOFs, coined ANMOF-74(M). This series of MOFs features substantial photoluminescence, with ANMOF-74(Zn) emitting across the whole visible spectrum. The materials moreover combine this photoluminescence with high surface areas and electrical conductivity. Compared to the original MOF-74 materials constructed from 2,5-dihydroxy terephthalic acid and the same metal ions Zn2+, Mg2+, Ni2+, Co2+ and Mn2+, we observed a conductivity enhancement of up to six orders of magnitude. Our results point towards the importance of building block design and the careful choice of the embedded MOF topology for obtaining materials with desired properties such as photoluminescence and electrical conductivity.

A Novel Way to Prepare Silicon Oxide Nanomaterials with White Light Emission by Reactive Ladder Polyhydrosilsesquioxane

2012 ◽  
Vol 1 (1) ◽  
pp. 76-80
Author(s):  
Zhongjie Ren ◽  
Rongben Zhang ◽  
Fengwen Yan ◽  
Shidong Jiang ◽  
Feng Wang ◽  
...  
Keyword(s):  
White Light ◽  
Silicon Oxide ◽  
Light Emission ◽  
White Light Emission

scholarly journals 22.F. Workshop: What makes for resilient health systems? Evidence from the State of Health in the EU country profiles

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
◽  
Keyword(s):  
Health System ◽  
Health Systems ◽  
Building Blocks ◽  
The State ◽  
Lessons Learned ◽  
Three Dimensions ◽  
Health System Strengthening ◽  
New Work ◽  
State Of Health ◽  
The Eu

Abstract The European Commission's State of Health in the EU (SoHEU) initiative aims to provide factual, comparative data and insights into health and health systems in EU countries. The resulting Country Health Profiles, published every two years (current editions: November 2019) are the joint work of the European Observatory on Health Systems and Policies and the OECD, in cooperation with the European Commission. They are designed to support the efforts of Member States in their evidence-based policy making and to contribute to health care systems' strengthening. In addition to short syntheses of population health status, determinants of health and the organisation of the health system, the Country Profiles provide an assessment of the health system, looking at its effectiveness, accessibility and resilience. The idea of resilient health systems has been gaining traction among policy makers. The framework developed for the Country Profiles template sets out three dimensions and associated policy strategies and indicators as building blocks for assessing resilience. The framework adopts a broader definition of resilience, covering the ability to respond to extreme shocks as well as measures to address more predictable and chronic health system strains, such as population ageing or multimorbidity. However, the current framework predates the onset of the novel coronavirus pandemic as well as new work on resilience being done by the SoHEU project partners. This workshop aims to present resilience-enhancing strategies and challenges to a wide audience and to explore how using the evidence from the Country Profiles can contribute to strengthening health systems and improving their performance. A brief introduction on the SoHEU initiative will be followed by the main presentation on the analytical framework on resilience used for the Country Profiles. Along with country examples, we will present the wider results of an audit of the most common health system resilience strategies and challenges emerging from the 30 Country Profiles in 2019. A roundtable discussion will follow, incorporating audience contributions online. The Panel will discuss the results on resilience actions from the 2019 Country Profiles evidence, including: Why is resilience important as a practical objective and how is it related to health system strengthening and performance? How can countries use their resilience-related findings to steer national reform efforts? In addition, panellists will outline how lessons learned from country responses to the Covid-19 pandemic and new work on resilience by the Observatory (resilience policy briefs), OECD (2020 Health at a Glance) and the EC (Expert Group on Health Systems Performance Assessment (HSPA) Report on Resilience) can feed in and improve the resilience framework that will be used in the 2021 Country Profiles. Key messages Knowing what makes health systems resilient can improve their performance and ability to meet the current and future needs of their populations. The State of Health in the EU country profiles generate EU-wide evidence on the common resilience challenges facing countries’ health systems and the strategies being employed to address them.

Lead chlorine cluster assembled one-dimensional halide with highly efficient broadband white-light emission

2021 ◽  
Author(s):  
Jian-Qiang Zhao ◽  
Chen Sun ◽  
Meng Yue ◽  
Yan Meng ◽  
Xian-Mei Zhao ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
One Dimensional ◽  
Highly Efficient

One new lead chlorine cluster assembled 1D non-perovskite halide of [DTHPE]2Pb3Cl10 was synthesized which displays strong broadband bluish white light emission with a high photoluminescence quantum efficiency of 19.45% exceeding those of previously reported 2D lead perovskites.

Sign in / Sign up

Export Citation Format

Share Document