Spatially Selective Optical Tuning of Quantum Dot Thin Film Luminescence

Chen, Jixin; Chan, Yang Hsiang; Yang, Tinglu; Wark, Stacey E.; Son, Dong Hee; Batteas, James D.

doi:10.1021/ja906837s

Cited by 20 publications

(33 citation statements)

References 31 publications

(16 reference statements)

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“…achieved laser-induced tunability of optical properties of self-assembled films of QDs. 16 However, with the self-assembly process, it is challenging to achieve site-specific deposition of QDs on the substrates. Due o their simplicity, additive nature, and real-time configurability via digital control, 17 direct-write techniques such as inkjet printing, electrohydrodynamic jet printing, and gravure printing have been explored to realize the site-specific deposition of QDs with high throughput and material saving.…”

Section: Introductionmentioning

confidence: 99%

Patterning and fluorescence tuning of quantum dots with haptic-interfaced bubble printing

et al. 2017

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Semiconductor quantum dots (QDs) are attractive for a wide range of applications such as displays, light-emitting devices, and sensors due to their properties such as tunable fluorescence wavelength, high brightness, and narrow bandwidth. Most of the applications require precise patterning of QDs with targeted properties on solid-state substrates. Herein, we have developed a haptic-interfaced bubble printing (HIBP) technique to enable high-resolution (510 nm) high-throughput (>104 μm s−1) patterning of QDs with strong emission tunability and to significantly enhance the accessibility of the technique via a smartphone device. The scalability and versatility of the HIBP are demonstrated in our arbitrary patterning of QDs on plasmonic substrates. A detailed study of plasmonic and photothermal interactions is performed via programmed stage movements to realize tunability of the emission wavelength and lifetime. Finally, the influence of the hand movement on the properties of the printed QDs in terms of emission wavelength tuning from yellow to blue is established. This work provides a single-step macroscale platform to manipulate nanoscale properties at high resolution and high throughput.

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Section: Introductionmentioning

confidence: 99%

Patterning and fluorescence tuning of quantum dots with haptic-interfaced bubble printing

et al. 2017

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“…53 A further reduction in the average lifetime to τ BP-Au = 2.69 ± 0.29 ns is observed upon BP of QDs over the plasmonic substrates, which is attributed to the reduced QD–substrate separation due to flow-induced bombardment effect and laser-induced ligand shortening along with QD oxidation. 1,54 We further studied the influence of the printing conditions over the emission rate of the patterned QDs by FLIM on the basis of the setup in Figure S13. Straight lines of QDs were printed with increased incident laser intensity from 0.29 to 0.58 mW/ μ m 2 .…”

Section: Resultsmentioning

confidence: 99%

High-Resolution Bubble Printing of Quantum Dots

Rajeeva¹,

Lin²,

Perillo³

et al. 2017

ACS Appl. Mater. Interfaces

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Semiconductor quantum dots (QDs) feature excellent properties, such as high quantum efficiency, tunable emission frequency, and good fluorescence stability. Incorporation of QDs into new devices relies upon high-resolution and high-throughput patterning techniques. Herein, we report a new printing technique known as bubble printing (BP), which exploits a light-generated microbubble at the interface of colloidal QD solution and a substrate to directly write QDs into arbitrary patterns. With the uniform plasmonic hot spot distribution for high bubble stability and the optimum light-scanning parameters, we have achieved full-color QD printing with submicron resolution (650 nm), high throughput (scanning rate of ∼10−2 m/s), and high adhesion of the QDs to the substrates. The printing parameters can be optimized to further control the fluorescence properties of the patterned QDs, such as emission wavelength and lifetime. The patterning of QDs on flexible substrates further demonstrates the wide applicability of this new technique. Thus, BP technique addresses the barrier of achieving a widely applicable, high-throughput and user-friendly patterning technique in the submicrometer regime, along with simultaneous fluorescence modification capability.

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“…[30][31][32][33] Although quantum dots are typically used in photopatterning, other materials like conjugated polymers, dyes, and nanostructures can also be used if their emission changes in response to light. [30][31][32][33] Although quantum dots are typically used in photopatterning, other materials like conjugated polymers, dyes, and nanostructures can also be used if their emission changes in response to light.…”

Section: Introductionmentioning

confidence: 99%

“…Not surprisingly, the intrinsic properties of QDs and the wide variety of QDs available have led to their implementation in a number of applications, including imaging/labeling/sensing in biological investigations, [17] light-emitting diodes (LEDs), [18] solar cells, [19,20] quantum computing, [21] and, more recently, lasers and optical gain media. [30][31][32][33] The modification of QD emission efficiency is due to intrinsic modification of the exciton relaxation pathways within the QD, so no physical deposition or removal of material is required to impart an emission pattern in a spectral photopattern. [29] One of the unifying principles of these approaches is that patterns are created by adding, removing, or rearranging material during a multi-step fabrication procedure.…”

mentioning

confidence: 99%

Programmed Emission Transformations: Negative‐to‐Positive Patterning Using the Decay‐to‐Recovery Behavior of Quantum Dots

Malak

Smith

Yoon

et al. 2016

Advanced Optical Materials

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Quantum dots (QDs) are a particularly interesting nanostructure for applications that require optical emission in the visible or near-infrared spectrum. These small (D < 10 nm) semiconducting nanoparticles exhibit size-dependent broadband absorption and narrowband photoluminescence (PL) (full-width half-maximum (FWHM) below 40 nm) due to quantum confinement of the exciton. [9][10][11] Many synthesis approaches have been developed for different QD architectures, including core, [12] core-shell, [13,14] alloyed coreshell, [15] and even core-shell-shell QDs, [16] which offer a range of optical characteristics. Not surprisingly, the intrinsic properties of QDs and the wide variety of QDs available have led to their implementation in a number of applications, including imaging/labeling/sensing in biological investigations, [17] light-emitting diodes (LEDs), [18] solar cells, [19,20] quantum computing, [21] and, more recently, lasers and optical gain media. [22][23][24] In addition, the application of nanotechnology for controlled light-matter interactions has been augmented by the variety of micro-and nanoscale patterning approaches that have been developed, including techniques like electron-and photolithography, [25] soft lithographies, [26,27] inkjet printing, [28] and molding and printing. [29] One of the unifying principles of these approaches is that patterns are created by adding, removing, or rearranging material during a multi-step fabrication procedure. Less investigation has been done on "nonphysical" patterning approaches like spectral photo patterning, which creates patterns by modifying the emission efficiency of quantum dots in specific areas of the film without physically modifying the film. [30][31][32][33] The modification of QD emission efficiency is due to intrinsic modification of the exciton relaxation pathways within the QD, so no physical deposition or removal of material is required to impart an emission pattern in a spectral photopattern. The non-physical aspect of spectral photopatterning is in sharp contrast to the traditional microand nanoscale physical patterning techniques. For this reason, spectral photopatterning could be very useful in areas such as photonic parity-time systems that require periodic modulation of optical gain and loss with no corresponding change in Positive and negative photoluminescent photopattern contrasts arising from intrinsic modification of quantum dot (QD) emission (decay or recovery) upon exposure to light are reported. The ability to fabricate a variety of photopattern types using a single type of quantum dot is due to a two-step decayto-recovery evolution upon light exposure. It is shown that high-contrast photopatterns spanning mm 2 areas can be fabricated within seconds with a facile one-step process, representing a drastic reduction in the time required to develop an emissive pattern in a QD-polymer film (from hours to seconds). Furthermore, the controlled light exposure allows for a programmed transformation of the emissive pattern contrast, with a rev...

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Spatially Selective Optical Tuning of Quantum Dot Thin Film Luminescence

Cited by 20 publications

References 31 publications

Patterning and fluorescence tuning of quantum dots with haptic-interfaced bubble printing

Patterning and fluorescence tuning of quantum dots with haptic-interfaced bubble printing

High-Resolution Bubble Printing of Quantum Dots

Programmed Emission Transformations: Negative‐to‐Positive Patterning Using the Decay‐to‐Recovery Behavior of Quantum Dots

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