Reduced Graphene Oxide Inserted into PEDOT:PSS Layer to Enhance the Electrical Behaviour of Light-Emitting Diodes

Rodríguez-Mas, Fernando; Ferrer, Juan Carlos; Alonso, José L.; Ávila, Susana Fernández de; Valiente, David

doi:10.3390/nano11030645

Cited by 10 publications

(5 citation statements)

References 35 publications

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“…As seen in Figure 3, absorbance spectra of CdS nanoparticles dissolved in methanol were observed at 255, 261, and 268 nm, while PL spectra were observed at 420 and 554 nm. In the previous study of CdS nanoparticles [18], the absorbance and fluorescence spectra of CdS in Toluene were found to be approximately 403.7 and 411 nm, and we have observed to 576 nm of CdS nanoparticles in toluene solvent. The UV-vis spectrum generally decreases with the size of the nanocrystals and the absorption maximum wavelength decreases with the particle size [19].…”

Section: The Solvent Effect On Nanoparticlesupporting

confidence: 52%

The Solvent Effect on Nanomaterials Composed of Liquid Crystals and Nanoparticles: uv-vis Absorbance and Fluorescence Spectra

KARA,

GÜLSEVEN SIDIR,

HOROZ

2023

Turkish Journal of Science and Technology

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We have been studied to determine solvent effect to interactions between 4-Ethoxybenzoic acid (4EOBA), 4-Pentylbenzoic acid (4PentBA), and 4-Pentylphenyl 4-Methylbenzoate (4PP4MetB) liquid crystals and CdS, CdSe with ZnS nanoparticles in DMSO, methanol, and toluene. For this, the absorbance and fluorescence spectra of the LC compounds in the solvent and the materials consisting of different nanoparticles were investigated. Absorbance and fluorescence electronic transitions are interpreted. The fluorescence of liquid crystals has been investigated in the shifts between wavelengths of the fluorescence of nanomaterials. It can be said that it has occurred blue shift at the maximum fluorescence wavelengths of the 4EOBA-CdS-DMSO and 4EOBA-CdSe-DMSO compared to 4EOBA-DMSO. On the other hand, we can say that in the 4EOBA-ZnS-DMSO solution occurs red shift in the fluorescence band, while the peaks seen in the fluorescence band can occur in result of interaction of liquid crystals and nanoparticles.

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Section: The Solvent Effect On Nanoparticlesupporting

confidence: 52%

The Solvent Effect on Nanomaterials Composed of Liquid Crystals and Nanoparticles: uv-vis Absorbance and Fluorescence Spectra

KARA,

GÜLSEVEN SIDIR,

HOROZ

2023

Turkish Journal of Science and Technology

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“…It is possible to see the existence of two peaks for the devices made using the THF and chloroform as solvent and three peaks for chlorobenzene and toluene. The first peak that appears in the spectrum for the chlorobenzene and toluene, at about 380 nm, corresponds to the well-known PVK emission [53,54], which causes a blue shift in the device emission with these solvents. The origin of this peak is related to the incomplete charge transferred from PVK to 2PXZ-OXD.…”

Section: Electroluminescence and Color Coordinatesmentioning

confidence: 98%

Wet-Deposited TADF-Based OLED Active Layers: New Approaches towards Further Optimization

Teixeira,

Germino,

Pereira

2023

Applied Sciences

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The effects of the solvent used for the active layer materials of an OLED based on TADF emitters play a fundamental role in solution-deposited devices. This work focuses on the effects on the performance of different solvents employed to fabricate a very simple two-organic-layer OLED based on a green TADF emitter, under the concept of host: guest matrix. From the different results of the main figures of merit, it was possible to conclude that the OLED that used toluene as a solvent for the active layer reached a maximum EQE of 14%, almost the maximum already obtained for this emitter in more complex device structures. With the analysis of the charge-transport processes, it was possible to establish an explanatory model for the obtained results. Through impedance spectroscopy, additional characterization of the nature of charge-transport processes was carried out. With these results, it was possible to correlate the relaxation times, with the electrical properties of the active layer, and make inferences about the interaction between the electrical charges and the defect levels, opening new possibilities for further development in printed OLEDs.

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“…Graphene is one of the best nano-materials in terms of good mechanical strength, high thermal conductivity, transparency, chemical inertness, and high hydrophobicity [ 1 , 2 ]. Due to the aforementioned properties and their multi-functionality, graphene nano-particles are widely employed in a range of applications from electronics gadgets to sensors, supercapacitors, batteries, as well as in medicine for dental and biomedical implants [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

EDM of Ti-6Al-4V under Nano-Graphene Mixed Dielectric: A Detailed Investigation on Axial and Radial Dimensional Overcuts

Ishfaq

Asad

Harris³

et al. 2022

Nanomaterials

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Ti-6Al-4V is considered a challenging material in terms of accurate machining. Therefore, electric discharge machining (EDM) is commonly engaged, but its low cutting rate depreciates its use. This issue is resolved if graphene nanoparticles are mixed in the dielectric. However, the control over the sparking phenomenon reduces because of the dispersion of graphene particles. Subsequently, the machined profile’s geometric accuracy is compromised. Furthermore, the presence of nanographene induces different sparks along axial and radial cutting orientations. This aspect has not been comprehensively examined yet and dedicatedly targeted in this study to improve the quality of EDM process for Ti-6Al-4V. A total of 18 experiments were conducted under Taguchi’s L18 design considering six parameters namely, electrode type, polarity, flushing time, spark voltage, pulse time ratio, and discharge current. The aluminum electrode proved to be the best choice to reduce the errors in both the cutting orientations. Despite the other parametric settings, negative tool polarity yields lower values of axial (ADE) and radial errors (RDE). The developed optimal settings ensure 4.4- and 6.3-times reduction in RDE and ADE, respectively. In comparison to kerosene, graphene-based dielectric yields 10.2% and 19.4% reduction in RDE and ADE, respectively.

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Reduced Graphene Oxide Inserted into PEDOT:PSS Layer to Enhance the Electrical Behaviour of Light-Emitting Diodes

Cited by 10 publications

References 35 publications

The Solvent Effect on Nanomaterials Composed of Liquid Crystals and Nanoparticles: uv-vis Absorbance and Fluorescence Spectra

The Solvent Effect on Nanomaterials Composed of Liquid Crystals and Nanoparticles: uv-vis Absorbance and Fluorescence Spectra

Wet-Deposited TADF-Based OLED Active Layers: New Approaches towards Further Optimization

EDM of Ti-6Al-4V under Nano-Graphene Mixed Dielectric: A Detailed Investigation on Axial and Radial Dimensional Overcuts

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