Hybrid nanocomposite materials with organic and inorganic components for opto-electronic devices

Holder, Elisabeth; Tessler, Nir; Rogach, Andrey L.

doi:10.1039/b712176h

Cited by 189 publications

(139 citation statements)

References 227 publications

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“…The key idea is to retain the mechanical strength and electronic properties of the inorganic portion and the processability and ease of functionalization of the organic constituents while directing energy at nanoscale dimensions by control of multiexcitonic processes. Hybrid materials can overcome the traditional limits associated with the individual building blocks, as seen in applications in optics, 1 electronics, 2 biosensors, 3 and photovoltaics. 4 For example, dye-sensitized solar cells (DSSCs) 5 combine a stable titania photoanode that has excellent transport properties with synthetically tunable organometallic complexes.…”

Section: Introductionmentioning

confidence: 99%

Designing Transmitter Ligands That Mediate Energy Transfer between Semiconductor Nanocrystals and Molecules

2017

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Molecular control of energy transfer is an attractive proposition because it allows chemists to synthetically tweak various kinetic and thermodynamic factors. In this Perspective, we examine energy transfer between semiconductor nanocrystals (NCs) and π-conjugated molecules, focusing on the transmitter ligand at the organic−inorganic interface. Efficient transfer of triplet excitons across this interface allows photons to be directed for effective use of the entire solar spectrum. For example, a photon upconversion system composed of semiconductor NCs as sensitizers, bound organic ligands as transmitters, and molecular annihilators has the advantage of large, tunable absorption cross sections across the visible and near-infrared wavelengths. This may allow the near-infrared photons to be harnessed for photovoltaics and photocatalysis. Here we summarize the progress in this recently reported hybrid upconversion platform and point out the challenges. Since triplet energy transfer (TET) from NC donors to molecular transmitters is one of the bottlenecks, emphasis is on the design of transmitters in terms of molecular energetics, photophysics, binding affinity, stability, and energy offsets with respect to the NC donor. Increasing the efficiency of TET in this hybrid platform will increase both the up-and down-conversion quantum yields, potentially exceeding the Shockley−Queisser limit for photovoltaics and photocatalysis.

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Section: Introductionmentioning

confidence: 99%

Designing Transmitter Ligands That Mediate Energy Transfer between Semiconductor Nanocrystals and Molecules

2017

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“…5. Optical applications often require that the nanoparticle be embedded into a transparent matrix (e.g., polymer or glass), forming a nanocomposite [12]. Colloidal nanoparticles can also be used as building blocks for nanoparticle solids or superlattices [13][14][15], which are very promising for applications requiring thin-films [16].…”

Section: Types Of Nanomaterialsmentioning

confidence: 99%

“…6 for details). They can also be solution-processed into nanocomposites with polymers [12], either by dissolving the NPs and polymers in a common solvent and subsequently drying out the mixture (ex situ method), or by carrying out the polymerization reaction in the presence of the NPs (in situ method). These nanocomposites are promising materials for devices that require optically active waveguides, such as luminescent solar concentrators [25,26], or optical switches [27].…”

Section: Chemical Beam Epitaxy (Cbe) Metallorganic Mbe (Mombe) or Mementioning

confidence: 99%

The Nanoscience Paradigm: “Size Matters!”

Donegá

2014

Nanoparticles

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The essential feature of nanomaterials is that their physical and chemical properties are size dependent, making it possible to engineer the material properties not only by defining its chemical composition, but also by tailoring the size and shape of the nanostructures, and the way in which individual building blocks are assembled. This chapter addresses the origin of the size dependence of the properties of nanomaterials, which can be traced to two fundamental nanoscale effects: (a) the increase in the surface/volume ratio with decreasing size, and (b) spatial confinement effects. Furthermore, the definition and classification of nanomaterials is introduced, and the techniques used to fabricate and study them are briefly discussed, with emphasis on nanoparticles of inorganic materials.

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“…A new trend in materials design privileges a combination of both, organic and inorganic, components in order to produce hybrid structures combining the preferred properties of both classes of materials. 1,[13][14][15][16][17][18] The direct linkage via the so-called ''grafting-on'' synthetic pathway of the pre-designed functional organic molecules onto the CdSe NCs using poly(thiophenes), 1 as well as the ''grafting-from''-based approach, growing polymer chains on the basis of poly(para-phenylene vinylene) 13 or P3HT 18 from the pre-designed CdSe surface, has been reported. In both cases, direct linkage of organic and inorganic components offers the advantage to achieve well-defined materials while avoiding aggregation commonly observed in simple blend 19 or layered 20 systems.…”

Section: Introductionmentioning

confidence: 99%

Inorganic–organic nanocomposites of CdSe nanocrystals surface-modified with oligo- and poly(fluorene) moieties

et al. 2011

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We report a facile grafting-from strategy towards the synthesis of inorganic-organic composites of semiconductor nanocrystals and wide-bandgap polymers. Amino-functional fluorenes have been used as co-ligands for CdSe nanocrystals, thus enabling us to design their surface directly during the synthesis. Highly monodisperse, strongly emitting CdSe nanocrystals have been obtained. Subsequently, a straightforward Yamamoto C-C coupling protocol was used to carry out surface polymerisation, hence modifying CdSe nanocrystals with oligo-and poly(fluorene) moieties. Both amino-fluorene capped CdSe nanocrystals and the resulting nanocrystal-polymer composites were characterized in detail by optical and FT-IR spectroscopy, TEM, AFM, and gel permeation chromatography, showing their potential as novel functional inorganic-organic hybrid materials.

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Hybrid nanocomposite materials with organic and inorganic components for opto-electronic devices

Cited by 189 publications

References 227 publications

Designing Transmitter Ligands That Mediate Energy Transfer between Semiconductor Nanocrystals and Molecules

Designing Transmitter Ligands That Mediate Energy Transfer between Semiconductor Nanocrystals and Molecules

The Nanoscience Paradigm: “Size Matters!”

Inorganic–organic nanocomposites of CdSe nanocrystals surface-modified with oligo- and poly(fluorene) moieties

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