Large exciton binding energy, high photoluminescence quantum yield and improved photostability of organo-metal halide hybrid perovskite quantum dots grown on a mesoporous titanium dioxide template

Parveen, Sumaiya; Paul, Kamal Kumar; Das, Ruma; Giri, P. K.

doi:10.1016/j.jcis.2018.12.105

Cited by 53 publications

(34 citation statements)

References 60 publications

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“…The formation of heterojunctions in the composite via incorporation of Pd NPs and electron acceptor GO sheets improves the charge-transfer interactions among shallow and deep trap states resulting in such a multiphonon behavior. , Rapid crystallization in the nucleation stage might also lead to the formation of defects in the lattice structure . The reduction in size of composites as depicted in field emission transmission electron microscopy (FETEM) (Figure ) and ultrasmall Pd NPs might generate emission spectra with increased intensity . The inset of Figure c shows green fluorescence for UiO-66/Pd-GO due to the presence of sub-10 nm Pd.…”

Section: Results and Discussionmentioning

confidence: 85%

Engineering of Interfacial Energy Bands for Synthesis of Photoluminescent 0D/2D Coupled MOF Heterostructure with Enhanced Selectivity toward the Proton-Exchange Membrane

Das

Mukherjee

Mandal

et al. 2021

ACS Appl. Mater. Interfaces

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Engineering of the interface for tuning the structural, functional, and electronic properties of materials via the formation of heterostructure composites exhibits immense potential in the current research scenario. This study reports a novel ternary composite synthesized by decoration of zero-dimensional Pd nanoparticles (NPs) and two-dimensional (2D) graphite oxide (GO) sheets in the UiO-66 metal−organic framework (MOF). A mixed matrix membrane was fabricated by incorporating this composite in the SPEEK polymer matrix, which exhibited higher selectivity compared to commercial Nafion 117. The synthesized composite and fabricated membranes were thoroughly characterized in terms of their chemical structures, microstructural morphologies, physicochemical, thermal, photo-electrochemical, and optical properties, ion-exchange capacity, proton conductivity, and methanol permeability. As per our knowledge, this is the first study which explores the effect of noble metal NPs and carbon 2D material simultaneously on the electronic structure of the MOF, resulting in improved selectivity. The electron-accepting nature of GO and surface plasmon resonance effect of Pd alter the energy band positions and scavenge the electrons, improving the proton conduction of the composite. The introduction of oxygen vacancies in lattice leads to efficient charge separation. The formation of a Schottky junction results in the localized electric field effect due to electron density fluctuation which aids in ion transport. The current study opens up a new route to overcome the major challenge associated with direct methanol fuel cells (DMFCs), that is, high/low methanol crossover by improving the proton conduction.

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Section: Results and Discussionmentioning

confidence: 85%

Engineering of Interfacial Energy Bands for Synthesis of Photoluminescent 0D/2D Coupled MOF Heterostructure with Enhanced Selectivity toward the Proton-Exchange Membrane

Das

Mukherjee

Mandal

et al. 2021

ACS Appl. Mater. Interfaces

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show abstract

“…In the same year, Parveen and coworkers further improved the template method. [38] They used fluorine-doped F-TiO 2 as template to synthesize MAPbI 3 and MAPbBr 3 quantum dots with tunable sizes in the range 1.7-5.1 nm. F-TiO 2 was prepared by hydrothermal method, and the pore size of F-TiO 2 was tuned by changing the concentration of reactant HF during the hydrothermal treatment, thereby tuning the size of perovskite nanoparticles.…”

Section: Template Methodsmentioning

confidence: 99%

“…In addition, this method is also applicable to synthesis MAPbBr 3 using ZrO 2 mesoporous film as template. In the same year, Parveen and coworkers further improved the template method [38] . They used fluorine‐doped F‐TiO 2 as template to synthesize MAPbI 3 and MAPbBr 3 quantum dots with tunable sizes in the range 1.7‐5.1 nm.…”

Section: Synthesis Of Organic‐inorganic Hybrid Perovskite Nanomaterialsmentioning

confidence: 99%

Organic‐Inorganic Hybrid Perovskite Nanomaterials: Synthesis and Application

Zhang

2020

ChemistrySelect

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In recent years, organic‐inorganic hybrid perovskite materials have drawn immense attention in the application of optoelectronic devices due to their superior semiconductor characteristics. Among them, organic‐inorganic hybrid perovskite nanomaterials with advantages such as long charge carrier diffusion lengths, high charge carrier mobilities, low trap‐state‐density, high photoluminescence quantum efficiency and low‐cost solution processability have shown great development potential in the field of semiconductor devices. In this review, we firstly summarize several synthesis strategies for organic‐inorganic hybrid perovskite nanomaterials, including template method, hot injection method, ligand‐assistant reprecipitation strategy, chemical vapor deposition method, microfluidic reactor method, ultrasound synthesis and mechanical ball milling method and analyze their own advantages and limitations. Subsequently, the research progress in applications in the field of light emitting diodes, solar cells, lasers and photodetectors are reviewed. At the end of this review, current challenges and future developments are discussed.

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“…37 The exciton binding energy of the layered perovskite can be increased by incorporating larger organic cations since high exciton binding energy is favorable for lightemitting applications as it enhances radiative recombination giving rise to high photoluminescence (PL) emission. 38 Considering an innite series of image charges, the increase in exciton binding energy in a multi-QW 2D system can be expressed using rst-order perturbation theory as given below: 39,40…”

Section: Properties Of 2d Layered Perovskitesmentioning

confidence: 99%

Emerging doping strategies in two-dimensional hybrid perovskite semiconductors for cutting edge optoelectronics applications

Parveen

Giri

2022

Nanoscale Adv.

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Large exciton binding energy, high photoluminescence quantum yield and improved photostability of organo-metal halide hybrid perovskite quantum dots grown on a mesoporous titanium dioxide template

Cited by 53 publications

References 60 publications

Engineering of Interfacial Energy Bands for Synthesis of Photoluminescent 0D/2D Coupled MOF Heterostructure with Enhanced Selectivity toward the Proton-Exchange Membrane

Engineering of Interfacial Energy Bands for Synthesis of Photoluminescent 0D/2D Coupled MOF Heterostructure with Enhanced Selectivity toward the Proton-Exchange Membrane

Organic‐Inorganic Hybrid Perovskite Nanomaterials: Synthesis and Application

Emerging doping strategies in two-dimensional hybrid perovskite semiconductors for cutting edge optoelectronics applications

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