Large-Scale and Electroswitchable Polarized Emission from Semiconductor Nanorods Aligned in Polymeric Nanofibers

Aubert, Tangi; Palangetic, Ljiljana; Mohammadimasoudi, Mohammad; Neyts, Kristiaan; Beeckman, Jeroen; Clasen, Christian; Hens, Zeger

doi:10.1021/acsphotonics.5b00068

Cited by 42 publications

(41 citation statements)

References 28 publications

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“…Thep olarization directions of polarizers Ia nd II are orthogonal, and the LC between the polarizers can regulate the light by electronic control. [4,11] However,the QD emission is isotropic and unpolarized;t hus,o ver 50 %o ft he emitted light is consumed before entering the LC layer because of the linear absorption of the polarizer. To improve the optical efficiency of the LCD backlight, aligned QRs could be coupled into the LCD backlight.…”

Section: Angewandte Chemiementioning

confidence: 99%

An All‐Inorganic Colloidal Nanocrystal Flexible Polarizer

et al. 2019

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Section: Angewandte Chemiementioning

confidence: 99%

An All‐Inorganic Colloidal Nanocrystal Flexible Polarizer

et al. 2019

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“…Hence, a significant role is played by the viscoelastic properties of the electrified solution, as well as by the very high strain rates (e.g., 10 3 –10 5 s −1 ) promoted by electrospinning. These might lead to a local increase of the polymer density at the jet center as previously probed by X‐ray imaging, and to the formation of relatively ordered, anisotropic conformations of both the polymer macromolecules and the embedded particles . In addition, the density of particles in the fibers can be controlled by varying the molar ratio of NPs to the polymer in the electrospun solution .…”

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confidence: 95%

Nanowire‐Intensified Metal‐Enhanced Fluorescence in Hybrid Polymer‐Plasmonic Electrospun Filaments

Camposeo

Jurga

Moffa

et al. 2018

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Hybrid polymer-plasmonic nanostructures might combine high enhancement of localized fields from metal nanoparticles with light confinement and long-range transport in subwavelength dielectric structures. Here, the complex behavior of fluorophores coupling to Au nanoparticles within polymer nanowires, which features localized metal-enhanced fluorescence (MEF) with unique characteristics compared to conventional structures, is reported. The intensification effect when the particle is placed in the organic filaments is remarkably higher with respect to thin films of comparable thickness, thus highlighting a specific, nanowire-related enhancement of MEF effects. A dependence on the confinement volume in the dielectric nanowire is also indicated, with MEF significantly increasing upon reduction of the wire diameter. These findings are rationalized by finite element simulations, predicting a position-dependent enhancement of the quantum yield of fluorophores embedded in the fibers. Calculation of the ensemble-averaged fluorescence enhancement unveils the possibility of strongly enhancing the overall emission intensity for structures with size twice the diameter of the embedded metal particles. These new, hybrid fluorescent systems with localized enhanced emission, and the general nanowire-enhanced MEF effects associated to them, are highly relevant for developing nanoscale light-emitting devices with high efficiency and intercoupled through nanofiber networks, highly sensitive optical sensors, and novel laser architectures.

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“…For these reasons, a lot of researchers are working on the alignment of QRs through different methods to achieve high DOP in large-scale. The alignment strategies include photo-illumination [34]- [36], applying electrical field [37]- [40], evaporation [41], [42], Langmuir-Blodgett (LB) assembly [43], [44], coffee stain effect [12], [13], [45], capillary effect [11], superlattice [46], [47], nanostructure assisted assembly [48]- [50], electrospinning [1], [3], [51], rubbing [9], [52], [53], stretching [2], [9], and vertical growth [16], [54]. However, all of these methods are not perfect enough.…”

Section: Introductionmentioning

confidence: 99%

Highly Polarized Fluorescent Film Based on Aligned Quantum Rods by Contact Ink-Jet Printing Method

et al. 2019

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In recent years, fluorescent quantum rods (QRs) receive much attention because of their properties of emitting specific wavelength polarized light with narrow full width at half maximum (FWHM). Therefore, QRs are usually aligned on devices, such as light emitting diodes, laser, and liquid crystal display (LCD), as a polarizer. In order to emit the light with a high degree of polarization (DOP), QRs need to be controlled and aligned almost along one direction on large-scaled devices. However, most of the proposed effective alignment approaches cannot be applied to a large area. Hence, we firstly propose the contact ink-jet printing (CIJP) method to align CdSe/CdS core/shell QRs. With the ink being printed, the QRs can move driven by ink flowing. Eventually, the QRs will be aligned along the printed trajectories and become a film with DOP of more than 40%. Furthermore, CIJP can realize arbitrarily large area fabrication without reducing DOP value. In the future, this method can be utilized to print on large-scaled substrates directly to fabricate polarized optoelectronic devices, and further applied to LCD backlights and optical lenses.

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Large-Scale and Electroswitchable Polarized Emission from Semiconductor Nanorods Aligned in Polymeric Nanofibers

Cited by 42 publications

References 28 publications

An All‐Inorganic Colloidal Nanocrystal Flexible Polarizer

An All‐Inorganic Colloidal Nanocrystal Flexible Polarizer

Nanowire‐Intensified Metal‐Enhanced Fluorescence in Hybrid Polymer‐Plasmonic Electrospun Filaments

Highly Polarized Fluorescent Film Based on Aligned Quantum Rods by Contact Ink-Jet Printing Method

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