Embedded growth of colorful CsPbX3 (X = Cl, Br, I) nanocrystals in metal−organic frameworks at Room Temperature

2022 ◽  
Author(s):  
Chen Chen ◽  
Lei Nie ◽  
Yizhe Huang ◽  
Shuang Xi ◽  
Xingyue Liu ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Metal Organic Framework ◽  
Light Emitting ◽  
Confined Growth ◽  
Wide Color Gamut ◽  
Metal Organic ◽  
Interfacial Synthesis ◽  
Novel Strategy ◽  
Lead Halide

Abstract Herein, we develop a novel strategy for preparing all-inorganic cesium lead halide (CsPbX3, X= Cl, Br, I) perovskite nanocrystals (NCs)@Zn-based metal-organic framework (MOF) composites through interfacial synthesis. The successful embedding of fluorescent perovskite NCs in Zn-MOFs is due to the in-situ confined growth, which is attributed to the re-nucleation of water-triggered phase transformation from Cs4PbBr6 to CsPbBr3. The controllable synthesis of mixed-halide based composites with various emission wavelength can be achieved by adding the desired amount of halide (Cl or I) salts in the re-nucleation process. More importantly, the anion exchange reaction is inhibited among various composites with different halogen atoms by being trapped in MOFs. Besides, a white light-emitting diode (WLED) is produced using a blue LED chip with the green-emitting and red-emitting composites, which has a color coordinate of (0.3291, 0.3272) and a wide color gamut. This work provides a novel route to achieving perovskite NCs growth in MOFs, which also can be extended to the other NCs embedded in frames as well.

scholarly journals Highly Luminescent Silver-Based MOFs: Scalable Eco-Friendly Synthesis Paving the Way for Photonics Sensors and Electroluminescent Devices

2020 ◽  
Author(s):  
Mario Gutierrez ◽  
Cristina Martín ◽  
Barbara Souza ◽  
Mark Van der Auweraer ◽  
Johan Hofkens ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Metal Organic Framework ◽  
Cost Effective ◽  
One Pot ◽  
Light Emitting ◽  
Metal Organic ◽  
Potential Impact ◽  
Scalable Synthesis ◽  
Potential Use

<p><a></a>Luminescent multifunctional nanomaterials are important because of their potential impact on the development of key technologies such as smart luminescent sensors and solid-state lightings. To be technologically viable, the luminescent material needs to fulfil a number of requirements for integration into real-world devices: facile and cost-effective fabrication, a high quantum yield, structural robustness, and long-term chemical stability. To achieve these requirements, an eco-friendly and scalable synthesis of a highly photoluminescent, multistimuli responsive and electroluminescent silver-based metal-organic framework (Ag-MOF), termed “OX-2” was developed. The high synthetic yield (at least 10 g of purely crystalline OX-2 via one pot reaction), together with its exceptional photophysical and mechanically resilient properties that can be reversibly switched by temperature and pressure make this material stood out over other competing luminescent materials. The potential use of OX-2 MOF as a good electroluminescent material was tested by constructing a proof-of-concept MOF-LED (Light Emitting Diode) device, further contributing to the rare examples of electroluminescent MOFs known to date. The results reveal the huge potential for exploiting the highly luminescent Ag MOF, where OX-2 may serve as a multitasking platform to engineer innovative photonic technologies.</p>

Warm-White-Light-Emitting Diode Based on a Dye-Loaded Metal–Organic Framework for Fast White-Light Communication

2017 ◽  
Vol 9 (40) ◽  
pp. 35253-35259 ◽  
Author(s):  
Zhiye Wang ◽  
Zi Wang ◽  
Bangjiang Lin ◽  
XueFu Hu ◽  
YunFeng Wei ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diode ◽  
Metal Organic Framework ◽  
Light Emitting ◽  
Warm White Light ◽  
Metal Organic ◽  
Organic Framework

Pure white light emission from a rare earth-free intrinsic metal–organic framework and its application in a WLED

2018 ◽  
Vol 6 (3) ◽  
pp. 614-621 ◽  
Author(s):  
Tuhina Mondal ◽  
Supriya Mondal ◽  
Saptasree Bose ◽  
Debabrata Sengupta ◽  
Uttam Kumar Ghorai ◽  
...  
Keyword(s):  
Rare Earth ◽  
White Light ◽  
Rare Earth Metal ◽  
Light Emission ◽  
Light Emitting Diode ◽  
Metal Organic Framework ◽  
Earth Metal ◽  
Light Emitting ◽  
Metal Free ◽  
Metal Organic

Designing of a white light emitting diode based on rare earth metal free intrinsic Zn-MOF by fabricating a suitable device.

scholarly journals Highly Luminescent Silver-Based MOFs: Scalable Eco-Friendly Synthesis Paving the Way for Photonics Sensors and Electroluminescent Devices

2020 ◽  
Author(s):  
Mario Gutierrez ◽  
Cristina Martín ◽  
Barbara Souza ◽  
Mark Van der Auweraer ◽  
Johan Hofkens ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Metal Organic Framework ◽  
Cost Effective ◽  
One Pot ◽  
Light Emitting ◽  
Metal Organic ◽  
Potential Impact ◽  
Scalable Synthesis ◽  
Potential Use

<p><a></a>Luminescent multifunctional nanomaterials are important because of their potential impact on the development of key technologies such as smart luminescent sensors and solid-state lightings. To be technologically viable, the luminescent material needs to fulfil a number of requirements for integration into real-world devices: facile and cost-effective fabrication, a high quantum yield, structural robustness, and long-term chemical stability. To achieve these requirements, an eco-friendly and scalable synthesis of a highly photoluminescent, multistimuli responsive and electroluminescent silver-based metal-organic framework (Ag-MOF), termed “OX-2” was developed. The high synthetic yield (at least 10 g of purely crystalline OX-2 via one pot reaction), together with its exceptional photophysical and mechanically resilient properties that can be reversibly switched by temperature and pressure make this material stood out over other competing luminescent materials. The potential use of OX-2 MOF as a good electroluminescent material was tested by constructing a proof-of-concept MOF-LED (Light Emitting Diode) device, further contributing to the rare examples of electroluminescent MOFs known to date. The results reveal the huge potential for exploiting the highly luminescent Ag MOF, where OX-2 may serve as a multitasking platform to engineer innovative photonic technologies.</p>

Improving the permeance of hybrid polymer/metal–organic framework (MOF) membranes for organic solvent nanofiltration (OSN) – development of MOF thin films via interfacial synthesis

2015 ◽  
Vol 3 (18) ◽  
pp. 9668-9674 ◽  
Author(s):  
James Campbell ◽  
R. P. Davies ◽  
D. Christopher Braddock ◽  
A. G. Livingston
Keyword(s):  
Metal Organic Framework ◽  
Composite Membranes ◽  
Hybrid Polymer ◽  
Thin Film Composite ◽  
Polymer Supports ◽  
Polymer Metal ◽  
Metal Organic ◽  
Interfacial Synthesis ◽  
Organic Solvent Nanofiltration

Films of HKUST-1 were fabricated, via interfacial synthesis, on polymer supports. MOF thin film composite membranes (MOF-TFCs) have similar solute retentions as in situ growth (ISG) membranes; but permeances are over 3 times higher.

scholarly journals Exciton Coupling and Conformational Changes Impacting the Excited State Properties of Metal Organic Frameworks

Molecules ◽  
2020 ◽  
Vol 25 (18) ◽  
pp. 4230
Author(s):  
Andreas Windischbacher ◽  
Luca Steiner ◽  
Ritesh Haldar ◽  
Christof Wöll ◽  
Egbert Zojer ◽  
...  
Keyword(s):  
Conformational Changes ◽  
Photophysical Properties ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Red Shift ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Exciton Coupling ◽  
Metal Organic ◽  
Crystalline Metal

In recent years, the photophysical properties of crystalline metal-organic frameworks (MOFs) have become increasingly relevant for their potential application in light-emitting devices, photovoltaics, nonlinear optics and sensing. The availability of high-quality experimental data for such systems makes them ideally suited for a validation of quantum mechanical simulations, aiming at an in-depth atomistic understanding of photophysical phenomena. Here we present a computational DFT study of the absorption and emission characteristics of a Zn-based surface-anchored metal-organic framework (Zn-SURMOF-2) containing anthracenedibenzoic acid (ADB) as linker. Combining band-structure and cluster-based simulations on ADB chromophores in various conformations and aggregation states, we are able to provide a detailed explanation of the experimentally observed photophysical properties of Zn-ADB SURMOF-2: The unexpected (weak) red-shift of the absorption maxima upon incorporating ADB chromophores into SURMOF-2 can be explained by a combination of excitonic coupling effects with conformational changes of the chromophores already in their ground state. As far as the unusually large red-shift of the emission of Zn-ADB SURMOF-2 is concerned, based on our simulations, we attribute it to a modification of the exciton coupling compared to conventional H-aggregates, which results from a relative slip of the centers of neighboring chromophores upon incorporation in Zn-ADB SURMOF-2.

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