Improved stability of OLEDs with mild oxygen plasma treated PEDOT:PSS

Zhou, Yun; Yuan, Yongbo; Cao, Ling-Fang; Zhang, Jie; Pang, Hongqi; Lian, Jiarong; Zhou, Xiang

doi:10.1016/j.jlumin.2006.01.236

Cited by 33 publications

(18 citation statements)

References 16 publications

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“…In the molecular structure of PEDOT:PSS, PSS acts as counter ion for hole doped conducting polymer and also helps to form waterborne dispersion of PEDOT:PSS . Conjugated polymer PEDOT:PSS can be the best alternative for the replacement of ITO and also its work function makes them a good hole transporting layer in OLED . Recently, PEDOT:PSS/MWCNT composite flexible electrodes are used in high performance supercapacitors .…”

Section: Introductionmentioning

confidence: 99%

Solution Processable PEDOT:PSS/Multiwalled Carbon Nanotube Composite Films for Flexible Electrode Applications

Jasna

Raman

Jayalekshmi

et al. 2018

Phys. Status Solidi A

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High‐performance flexible optoelectronic devices have great potential as active elements for flexible and wearable electronics. The authors report highly flexible conducting poly (3, 4‐ethylene dioxythiophene):polystyrene sulfonate/multiwalled carbon nanotubes (PEDOT:PSS/MWCNT) composite thin films synthesized by simple, cost effective rod‐coating technique. The effect of MWCNT on PEDOT:PSS matrix is analyzed by spin coating PEDOT:PSS/MWCNT composite on glass substrates with varying concentration (0–2 wt%) of MWCNT. Field emission scanning electron microscope (FE‐SEM) images confirm the uniform dispersion of MWCNT and formation of conducting path above 0.3 wt% of MWCNT. The conductivity of the spin coated films is increased from 1 Scm−1 to ≈20 Scm−1 on addition of 2 wt% of MWCNT. From UV‐Vis NIR spectra, the transparency of composite films in the visible range (at 550 nm) is found to decrease with respect to MWCNT loading. The PEDOT:PSS/MWCNT flexible electrode exhibit high electrical conductivity of 74 Scm−1 and high stability upon bending to a radius of curvature ≈9.6 mm. The features observed are an outcome of the interaction of MWCNT with PEDOT polymer as the back bone. These films are adhered to the substrate and the properties are stable upon bending the film for large number of cycles. To demonstrate the potential use of this composite film as an electrode, a thin film transistor is fabricated with PEDOT:PSS/MWCNT film as source and drain electrode. The device shows high field effect mobility of µsat = 1.16 cm2 V−1 s−1 with on/off ratio about 2.3 × 103. These favorable results make PEDOT:PSS/MWCNT conducting electrode as an excellent candidate for the next generation flexible electrodes realized by a facile solution process.

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Section: Introductionmentioning

confidence: 99%

Solution Processable PEDOT:PSS/Multiwalled Carbon Nanotube Composite Films for Flexible Electrode Applications

Jasna

Raman

Jayalekshmi

et al. 2018

Phys. Status Solidi A

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“…The plasma treatment may change the surface energy and lead to the improvement in adhesion strength at the interface of layers [19]. Furthermore, the thermal annealing and in situ electromagnetic field treatments can play key roles in improving the interfacial adhesion between the anode and hole transport layer due to the enhanced inter-chain or inter-molecular interactions after those treatments.…”

Section: Morphology Of 2-tnata:c60 Filmsmentioning

confidence: 99%

“…The root mean square (rms) roughness was decreased from 4.627 to 2.498 nm. In general, the film stability is improved when organic semiconducting materials are doped with small organic dopants such as C60 and F 4 -TCNQ (2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane) [16][17][18][19]. It is expected that the film stability of 2-TNATA:C60 can be increased by physical crosslinking that takes place due to the p-p bond interaction between the organic semiconducting materials and C60, causing the inter-molecular interactions in the films [24].…”

Section: Morphology Of 2-tnata:c60 Filmsmentioning

confidence: 99%

“…Enhanced hole injection from ITO into the HTL can lower the operating voltage and, thus, improve performances of the diodes such as the current density-voltage (J-V) and luminescence-voltage (L-V) characteristics [14,15]. Improvements in device performance via thermal annealing highlight the importance of controlling molecular morphology since device performance can be hindered by structural defects in molecular level [16][17][18][19]. Thermal annealing can be applied to spin-coated polymers or vacuum-deposited organic materials to achieve morphological tuning.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced performance of organic electroluminescence diodes with a 2-TNATA:C60 hole injection layer

Kang

Park

Cho

et al. 2009

Journal of Industrial and Engineering Chemistry

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“…Thus, solution processing is more attractive for cost‐effective and easy‐to‐manufacture OLED fabrication because it does not require vacuum equipment. Polyethylene dioxythophene : polystyrenesulfonate (PEDOT : PSS) is one of the most commonly used hole injection materials in both polymer and small‐molecule LEDs due to its high conductivity, good hole injection properties, and solution processibility . However, it has been demonstrated that PEDOT : PSS can cause degradation and decrease the stability of the device .…”

Section: Introductionmentioning

confidence: 99%

Improved performances in organic and polymer light‐emitting diodes using solution‐processed vanadium pentoxide as a hole injection layer

Lee

2012

J Soc Info Display

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We report that a solution‐processed vanadium pentoxide (V2O5) layer can be utilized as an effective and stable hole injection layer in organic light‐emitting diodes and polymer light‐emitting diodes instead of polyethylene dioxythiophene : polystyrenesulfonate (PEDOT : PSS). The organic light‐emitting diode and polymer light‐emitting diode with the V2O5 layer have driving voltages that are 2.2 and 0.3 V lower for 1000 cd/m2, respectively, than the devices with PEDOT : PSS. In addition, the devices with the V2O5 layer show improved operational stability compared with the devices with PEDOT : PSS. Therefore, a solution‐processed V2O5 layer can be utilized as an effective and stable hole injection layer instead of PEDOT : PSS.

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Improved stability of OLEDs with mild oxygen plasma treated PEDOT:PSS

Cited by 33 publications

References 16 publications

Solution Processable PEDOT:PSS/Multiwalled Carbon Nanotube Composite Films for Flexible Electrode Applications

Solution Processable PEDOT:PSS/Multiwalled Carbon Nanotube Composite Films for Flexible Electrode Applications

Enhanced performance of organic electroluminescence diodes with a 2-TNATA:C60 hole injection layer

Improved performances in organic and polymer light‐emitting diodes using solution‐processed vanadium pentoxide as a hole injection layer

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