Plasmonic Ag nanoparticle interlayers for organic photovoltaic cells: An investigation of dielectric properties and light trapping

Ranganathan, K.; Wamwangi, Daniel; Coville, Neil J.

doi:10.1016/j.solener.2015.05.022

Cited by 14 publications

(4 citation statements)

References 41 publications

(49 reference statements)

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“…As the nominal thickness increases, the diameter of Ag nanoparticles on the buffer layer is gradually increased, and the surface coverage is also increased. The surface energy of PEDOT:PSS is about 70 mJ/m 2 , which is larger than that of PEN (about 40 mJ/m 2 ). − Therefore, Ag dewetting may have been promoted by the outgassing of SO 2 /SO 3 in PEDOT:PSS rather than by the change in the surface energy, similar to the previous study in which Ag dewetting was altered by the sublimation of the Sb sacrificial layer. − Figure S2 shows the average diameters of the Ag nanoparticles in all cases.…”

Section: Resultssupporting

confidence: 71%

Light Extraction Enhancement in Flexible Organic Light-Emitting Diodes by a Light-Scattering Layer of Dewetted Ag Nanoparticles at Low Temperatures

Choi

Kim

Park

et al. 2018

ACS Appl. Mater. Interfaces

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We demonstrated light extraction improvement by applying a scattering layer of Ag nanoparticles physically synthesized through a low-temperature annealing process to flexible organic light-emitting diodes (OLEDs). In general, increasing the size of Ag nanoparticles is preferred to increase light scattering, but a high-temperature annealing process (∼400 °C) is required to produce them. However, flexible substrates generally cannot withstand high-temperature processes. In this study, we formed Ag nanoparticles at a low temperature of ∼200 °C by inserting a poly(3,4-ethylenedioxythiophene) polystyrene sulfonate buffer layer, thus promoting Ag dewetting. As a result, the scattering layer of enlarged Ag nanoparticles formed at low temperatures increased the external quantum efficiency by 24% in a flexible OLED compared to a reference device.

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Section: Resultssupporting

confidence: 71%

Light Extraction Enhancement in Flexible Organic Light-Emitting Diodes by a Light-Scattering Layer of Dewetted Ag Nanoparticles at Low Temperatures

Choi

Kim

Park

et al. 2018

ACS Appl. Mater. Interfaces

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“…of gold nanoparticles (AuNPs) since such plasmonic systems have been used for enhancing the efficiency of photovoltaic devices. 19,20…”

Section: Artigomentioning

confidence: 99%

Spectroscopic Characterization of Pedot:pss Conducting Polymer by Resonance Raman and Serrs Spectroscopies

Almeida¹,

Izumi²,

Santos³

et al. 2019

Quím. Nova

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Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) synthesis was monitored by resonance Raman (RR) and surface-enhanced resonance Raman scattering (SERRS) spectroscopies and both the oxidation of the polymer and the effects of chain length were assessed by vibrational analysis. It was supported by theoretical models of oligomers, with charge ranging from 0 to +6 and size varying from 2 to 16 3,4-ethylenedioxythiophene (EDOT) repeat units, described through density functional theory. The symmetric C α C β stretching band observed at ca. 1426 cm-1 shifts to higher wavenumbers for reaction times varying from 2 to 9 hours and stabilizes at intermediate wavenumbers for longer times. The former behavior was ascribed to the increase of concentration of oxidized species, which was corroborated by calculated wavenumbers for oligomer models when their charges changed from neutral to +6. The behavior observed for longer reaction times was associated with the growth of chains. It was also observed through SERRS spectroscopy that small chains of the polymer, obtained in the early time of the synthesis, adsorbs on gold nanoparticle surfaces through interactions via oxidized residues. In this way, RR and SERRS spectroscopies were valuable tools to follow the synthetic procedures of PEDOT:PSS, allowing the determination of the structural evolution of the polymer.

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“…The electric field of charged particles can significantly modify the electronic properties of the molecular thin film. − Moreover, the charge of NPs, surrounded by a wide-band-gap medium, can keep the change for a long time. As a consequence, there are notable global efforts to produce a new type of memory device for long-lasting storage of data. , The composites discussed above appear to be increasingly attractive to researchers due to their numerous potential applications. , In addition to the prospects of high performance, devices using organic-based hybrid schemes can be flexible, which is an additional advantage . Particularly significant is the fact that the development of such hybrid materials is comparatively low in cost and the manufacturing processes are fairly simple.…”

Section: Introductionmentioning

confidence: 99%

“…21,22 The composites discussed above appear to be increasingly attractive to researchers due to their numerous potential applications. 23,24 In addition to the prospects of high performance, devices using organic-based hybrid schemes can be flexible, which is an additional advantage. 3 Particularly significant is the fact that the development of such hybrid materials is comparatively low in cost and the manufacturing processes are fairly simple.…”

Section: Introductionmentioning

confidence: 99%

2D/3D Metallic Nano-objects Self-Organized in an Organic Molecular Thin Film

et al. 2020

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We present the fabrication and investigation of the properties of nanocomposite structures consisting of two-dimensional (2D) and three-dimensional (3D) metallic nano-objects self-organized on the surface and inside of organic molecular thin-film copper tetrafluorophthalocyanine (CuPcF4). Metallic atoms, deposited under ultrahigh vacuum (UHV) conditions onto the organic ultrathin film, diffuse along the surface and self-assemble into a system of 2D metallic overlayers. At the same time, the majority of the metal atoms diffuse into the organic matrix and self-organize into 3D nanoparticles (NPs) in a well-defined manner. The evolution of the morphology and electronic properties of such structures as a function of nominal metal content is studied under UHV conditions using transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), and photoelectron spectroscopy (PES) techniques. Using HR-TEM, we have observed the periodicity of atomic planes of individual silver NPs. The steady formation of agglomerates from individual single nanocrystallites with intercrystallite boundaries is observed as well. PES reveals generally weak chemical interactions between silver and the organic matrix and n-doping of CuPcF4 at the initial stages of silver deposition, which is associated with charge transfer from the 2D wetting layer on the basis of core-level spectra shift analysis.

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Plasmonic Ag nanoparticle interlayers for organic photovoltaic cells: An investigation of dielectric properties and light trapping

Cited by 14 publications

References 41 publications

Light Extraction Enhancement in Flexible Organic Light-Emitting Diodes by a Light-Scattering Layer of Dewetted Ag Nanoparticles at Low Temperatures

Light Extraction Enhancement in Flexible Organic Light-Emitting Diodes by a Light-Scattering Layer of Dewetted Ag Nanoparticles at Low Temperatures

Spectroscopic Characterization of Pedot:pss Conducting Polymer by Resonance Raman and Serrs Spectroscopies

2D/3D Metallic Nano-objects Self-Organized in an Organic Molecular Thin Film

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