Effects of Gold-Nanoparticle Surface and Vertical Coverage by Conducting Polymer between Indium Tin Oxide and the Hole Transport Layer on Organic Light-Emitting Diodes

Kim, Sung Hyun; Bae, Tae Sung; Heo, Wooseok; Joo, Taiha; Song, Kyung Won; Park, Hong Gyu; Ryu, Sung‐Soo

doi:10.1021/acsami.5b04248

Cited by 27 publications

(18 citation statements)

References 28 publications

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“…For the Au NSs, the reflectivity increases with particle size. For the Au NRs, the double plasmon resonance of Au NRs normally matches with different wavelengths . In FSPR, the emission enhancing is determined by reflectivity and phase shift, both of which as a function of wavelength.…”

Section: Resultsmentioning

confidence: 99%

“…In the localized SPR (LSPR) effect, the extinction wavelength and emission enhancing ratio is determined by the shape and size of nanoparticles. Different size and shape nanoparticles have been introduced to the device, where the one well matching with the PL emission of active layer results the best enhancing effect . Besides, the LSPR effect requires the distance between nanoparticle and emitting dye less than 10 nm for effective enhancement .…”

Section: Introductionmentioning

confidence: 99%

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Size and Shape Effect of Gold Nanoparticles in “Far‐Field” Surface Plasmon Resonance

Zhuang

Liu

et al. 2018

Part & Part Syst Charact

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The “far‐field” surface plasmon resonance (FSPR) of metal nanoparticles, which have built a facile way to emission enhancement of red, green, blue, and white with nice reproducibility, has big potential application in solution‐processed organic light‐emitting diodes (OLEDs). According to the theory of the “far‐field” effect, the reflectivity of the metal surface and the phase shift at the reflection play an important role in enhancing ratio, which strongly relate to the size and shape of nanoparticles. In this work, gold nanospheres with different sizes and nanorods are synthesized in order to determine the size and shape effect of FSPR. The results demonstrate that the one with higher reflectivity in a certain range induces a better emission enhancement in the luminous efficiency and the maximum brightness. The nanoparticles with bigger sizes and shape of rods have higher reflectivity, which is consistent with the simulation based on FSPR effect. The phase shifts of different nanoparticles are optimized by the distance between gold nanoparticles and emitters. The metal NPs with a high reflectivity and the applicable phase shift will have big potential for the emission enhancement in OLEDs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Size and Shape Effect of Gold Nanoparticles in “Far‐Field” Surface Plasmon Resonance

Zhuang

Liu

et al. 2018

Part & Part Syst Charact

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“…Kim et al . also proposed that large Au-NPs enhance the electromagnetic field around the Au-NPs under the action of an electrical bias, which can contribute to the increased current density 42 . Thus, the cross-talk effects in the pressure sensing arrays fabricated with the Au-NPs/PEDOT:PSS films become serious when the Au-NPs are larger than 20 nm in diameter (Fig.…”

Section: Discussionmentioning

confidence: 99%

Cross-Talk Immunity of PEDOT:PSS Pressure Sensing Arrays with Gold Nanoparticle Incorporation

Karmakar

et al. 2017

Sci Rep

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In this study, the cross-talk effects and the basic piezoresistive characteristics of gold nanoparticle (Au-NP) incorporated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) pressure sensing 2 × 2 arrays are investigated using a cross-point electrode (CPE) structure. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) mappings were carried out to confirm the incorporation of Au-NPs in the PEDOT:PSS films. A solution mixing process was employed to incorporate the nanoparticles. When the diameter of the Au-NPs incorporated in the PEDOT:PSS films (Au-NPs/PEDOT:PSS) was 20 nm, the piezoresistive pressure sensing 2 × 2 arrays were almost immune to cross-talk effects, which enhances the pressure sensing accuracy of the array. The Au-NPs render the PEDOT:PSS films more resilient. This is confirmed by the high plastic resistance values using a nanoindenter, which reduce the interference between the active and passive cells. When the size of the Au-NPs is more than 20 nm, a significant cross-talk effect is observed in the pressure sensing arrays as a result of the high conductivity of the Au-NPs/PEDOT:PSS films with large Au-NPs. With the incorporation of optimally sized Au-NPs, the PEDOT:PSS piezoresistive pressure sensing arrays can be promising candidates for future high-resolution fingerprint identification system with multiple-electrode array structures.

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“…In the Alq 3 ‐based devices with and without buckling, the current efficiency was 1.67 and 3.65 cd/A, respectively, corresponding to an enhancement of 120%. Metal nanoparticles induced localized surface plasmon resonance also support the broadband SPP excitation and can be embedded into the OLEDs . Implementing quasi‐periodic subwavelength nanofunnel arrays on the hole‐injection layer of PEDOT:PSS via soft nanoimprinting lithography enhance broadband light extraction in WOLEDs .…”

Section: Enhanced Device Performance By Micro/nano Patternsmentioning

confidence: 99%

Light manipulation in organic light‐emitting devices by integrating micro/nano patterns

Feng

Liu

et al. 2017

Laser & Photonics Reviews

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The demonstration of high efficiency and color tunability has brought organic light‐emitting devices (OLEDs) into the lighting and display market. High efficiency is one of the key issues for their commercial applications, for which much effort has been devoted to developing novel materials and device structures. It is well known that around 80% of the generated photons are trapped in OLED structure, so that there is still the greatest scope for significant improvements in its efficiency. This has driven the research towards the integration of micro/nano patterns into device structures that benefit from their abilities in manipulating the generation and propagation of photons. Micro/nano patterns with random or periodic morphologies have demonstrated their effect on the outcoupling of the trapped photons within the device. Moreover, the emitting properties other than the light extraction could be manipulated by introducing the micro/nano patterns. This article reviews the recent progresses in improving the light extraction and manipulating the emission properties of the OLEDs through the introduction of the micro/nano patterns by various fabrication strategies. The light manipulation of the micro/nano patterns in organic photovoltaics is briefly discussed considering its similar working principle and fabrication strategies to that of the OLEDs.

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Effects of Gold-Nanoparticle Surface and Vertical Coverage by Conducting Polymer between Indium Tin Oxide and the Hole Transport Layer on Organic Light-Emitting Diodes

Abstract: PSS clearly influenced the OLED current density and efficiency.

Cited by 27 publications

References 28 publications

Size and Shape Effect of Gold Nanoparticles in “Far‐Field” Surface Plasmon Resonance

Size and Shape Effect of Gold Nanoparticles in “Far‐Field” Surface Plasmon Resonance

Cross-Talk Immunity of PEDOT:PSS Pressure Sensing Arrays with Gold Nanoparticle Incorporation

Light manipulation in organic light‐emitting devices by integrating micro/nano patterns

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