Observation of Enhanced Energy Transfer in Individual Quantum Dot−Oligophenylene Vinylene Nanostructures

Odoi, MY; Hammer, Nathan I.; Sill, Kevin; Emrick, Todd; Barnes, Sean L.

doi:10.1021/ja058429j

Cited by 81 publications

(89 citation statements)

References 20 publications

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“…Furthermore, this could improve the compatibility between the polymer and inorganic semiconductors and influence the energetic and electronic properties of nanoparticles. For example, enhancement of charge/energy transfer between conjugated polymers and quantum dots was observed by chemical grafting of the conjugated polymer on the nanoparticle surface [29,32,33]. Some works [28][29][30][31] have been related to the photovoltaic applications of nanoparticles functionalized with conjugated polymers, but only one previous report [31] the device efficiency could be improved by bringing the conjugated polymers and nanoparticles into an intimate contact.…”

Section: Introductionmentioning

confidence: 99%

A facile route for preparation of conjugated polymer functionalized inorganic semiconductors and direct application in hybrid photovoltaic devices

Geng¹,

Guo²,

Peng³

et al. 2010

Solar Energy Materials and Solar Cells

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Section: Introductionmentioning

confidence: 99%

A facile route for preparation of conjugated polymer functionalized inorganic semiconductors and direct application in hybrid photovoltaic devices

Geng¹,

Guo²,

Peng³

et al. 2010

Solar Energy Materials and Solar Cells

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“…Fluorescence imaging and spectroscopic measurements were obtained using a Nikon TE300 inverted microscope with a 1.4 NA oil objective in a total internal reflection (TIR) configuration. [63,72,73] Fluorescence images were acquired using a Princeton Instruments PhotonA C H T U N G T R E N N U N G Max CCD camera with a typical exposure time of 1 s. Spectra were acquired by focusing the single-molecule emission from the side port of the microscope onto an Acton SP2150i dual-grating spectrograph and detected with a Roper Scientific Pixis 400B back-illuminated CCD. Dipole emission patterns were obtained through slight defocusing of the microscope objective.…”

mentioning

confidence: 99%

Single‐Molecule Studies of a Model Fluorenone

et al. 2007

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Single-molecule fluorescence measurements of 2,7-bis(3,4,5-trimethoxyphenylethenyl)fluorenone (OFOPV) reveal narrow emission spectra concentrated around 540 nm, with weak emission at longer wavelengths. The wide scattering of emission-maximum wavelengths is attributed to varying molecular environments, with dimers or higher-order aggregates contributing to the low-energy emission. This spectral distribution indicates that emission from monomers of this model fluorenone is mostly green, which is consistent with contaminant emission (g-bands) often observed in fluorene- and polyfluorene-based organic light emitting diode (OLED) devices. A histogram of center wavelengths from 118 single-molecule spectra shows good agreement with the green emission previously observed in thermally stressed 2,7-bis(3,4,5-trimethoxyphenylethenyl)-9,9-diethylfluorene (OFPV). Whereas bulk OFPV exhibits blue fluorescence at about 480 nm, OFOPV bulk thin film measurements reveal red luminescence shifted to 630 nm. This unexpected peak position for bulk OFOPV shifts to higher energies (ca. 540 nm) upon dilution in a solid-state matrix, suggesting that the bulk red emission finds its origins in interactions between fluorenone molecules. Explanations for this red emission include aggregate or excimer formation or intermolecular energy transfer between fluorenone molecules.

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“…145 These effects are both desirable in hybrid LEDs as they enhance the device stability and device efficiency by reducing non-radiative losses. A competitive approach to suppress polymer host interchain interaction is the introduction of linear 152,153 and side-functional, 154 or dendritic capping ligands. [155][156][157] Mixing of NCs with polymers was also shown to result in enhanced energy transfer from the polymer to the NCs.…”

Section: Technology Driven Exploration Of Hybrid Materialsmentioning

confidence: 99%

Review—Organic-Inorganic Hybrid Functional Materials: An Integrated Platform for Applied Technologies

Mir

Nagahara

Thundat

et al. 2018

J. Electrochem. Soc.

317

156

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Hybrid functional materials, constituting both inorganic and organic components, are considered potential platforms for applications in extremely diverse fields such as optics, micro-electronics, transportation, health, energy, energy storage, diagnosis, housing, environment and the highly relevant area is Internet of Things (IoT). Material properties of hybrid materials can be tuned by modification of the composition on the molecular scale to produce smart materials. Cross-cutting approaches, to synergistically couple molecular engineering and processing allows to tailor complex hybrid systems of various shapes with perfect control over size, composition, functionality, and morphology. The detailed description and discussion of variety of hybrid functional organicinorganic materials and their contribution in the designing of specific modern technologies is the prime focus of this review. There is an enormous demand for hybrid materials to provide technological breakthroughs with the most sought after being the enabling of the IoT. Interest in the field of IoT will witness exponential growth over the next decade as markets realize the true potential of realtime data acquisition for various entertainment, knowledge dissemination, defense, environmental, and healthcare applications. Many of the well-established materials, such as metals, 1 ceramics, 2-4 or plastics 5,6 cannot fulfill all technological desires for the various new applications. In addition to the early interest in structural hybrid materials based on carbon-silicon networks, many recent efforts have centered on the design of functional hybrid materials which harness the chemical activity of their components. This approach has been successfully used in recent years in the design of hybrid polymers 7 with special emphasis on structural hybrid materials based on mixed silicon-carbon networks prepared by sol-gel methods [8][9][10][11][12] which can also entrap additional active species. 13 In this field the stakes are high and scientists aim at producing structural materials with properties between those of inorganic glasses and organic polymers.8 But the expectations go beyond mechanical strength and thermal and chemical stability. These new materials are also sought for improved optical, 14-17 and electrical 18,19 properties, luminescence, 12,20-25 ionic conductivity, [26][27][28] and selectivity, 29-32 as well as chemical [33][34][35] or biochemical 36-38 activity. Chemical activity is of core importance in functional materials. Sensors, selective membranes, all sorts of electrochemical devices, from actuators to batteries or supercapacitors, supported catalysts or photoelectrochemical energy conversion cells are some important devices based on hybrid functional materials.Hybridization is a multifaceted strategy. In some cases, conducting organic polymers act just as a solid polymeric support for active species, whereas in other hybrid systems the activity of organic and inorganic species combines to reinforce or modify each other. But in every case ...

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Observation of Enhanced Energy Transfer in Individual Quantum Dot−Oligophenylene Vinylene Nanostructures

Cited by 81 publications

References 20 publications

A facile route for preparation of conjugated polymer functionalized inorganic semiconductors and direct application in hybrid photovoltaic devices

A facile route for preparation of conjugated polymer functionalized inorganic semiconductors and direct application in hybrid photovoltaic devices

Single‐Molecule Studies of a Model Fluorenone

Review—Organic-Inorganic Hybrid Functional Materials: An Integrated Platform for Applied Technologies

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