Dye-doped poly(3,4-Ethylenedioxythiophene)-Poly(Styrenesulfonate) electrodes for the application in organic light-emitting diodes

Huseynova, Gunel; Lee, Seung‐Hoon; Joo, Chul Woong; Lee, Ye-Seul; Lim, Young-Ji; Park, Jaeyoung; Yoo, J.; Cho, Nam Sung; Kim, Yong Hyun; Lee, Jonghee; Lee, Jae-Hyun

doi:10.1016/j.tsf.2020.138078

Cited by 7 publications

(4 citation statements)

References 45 publications

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“… − Here the active dopant species is formed in situ during thermal evaporation. Lately, a couple of examples have emerged of dyes also being used for p-doping, particularly with respect to conductivity improvement of polypyrrole through morphology improvements. − …”

Section: Molecular Doping Of Organic Semiconductorsmentioning

confidence: 99%

Doping Approaches for Organic Semiconductors

et al. 2021

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Electronic doping in organic materials has remained an elusive concept for several decades. It drew considerable attention in the early days in the quest for organic materials with high electrical conductivity, paving the way for the pioneering work on pristine organic semiconductors (OSCs) and their eventual use in a plethora of applications. Despite this early trend, however, recent strides in the field of organic electronics have been made hand in hand with the development and use of dopants to the point that are now ubiquitous. Here, we give an overview of all important advances in the area of doping of organic semiconductors and their applications. We first review the relevant literature with particular focus on the physical processes involved, discussing established mechanisms but also newly proposed theories. We then continue with a comprehensive summary of the most widely studied dopants to date, placing particular emphasis on the chemical strategies toward the synthesis of molecules with improved functionality. The processing routes toward doped organic films and the important doping−processing−nanostructure relationships, are also discussed. We conclude the review by highlighting how doping can enhance the operating characteristics of various organic devices.

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Section: Molecular Doping Of Organic Semiconductorsmentioning

confidence: 99%

Doping Approaches for Organic Semiconductors

et al. 2021

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“…Although MR is itself poorly soluble in water, it showed good solubility in the aqueous solution of PEDOT:PSS polymer presumably due to the electrostatic interaction [32,33]. It was confirmed that the combination of MR's good solubility and strong electron-accepting nature makes it a very effective solution-processed p-type dopant [25]. The cationic charge of the dye leads to an efficient charge transfer from the HOMO of the host polymer to the lowest unoccupied molecular orbital (LUMO) of the dopant, which is prominent from the additional absorbance peak in the visible spectra, as seen in Figure 1(c).…”

Section: Resultsmentioning

confidence: 99%

“…In this study, the contact between the anode and the overlying organic layers was enhanced by applying doped polymer as the anode material to achieve efficient blue phosphorescence in OLEDs based on an Ir(III) complex. For this purpose, PEDOT:PSS (PH1000) was doped with a 10 wt% concentration of MR, which is twice higher than the previously reported values [25]. The red-colored and uniform polymer films that were obtained after doping with electrical conductivity significantly increased from 0.25 to 50 S•cm −1 compared to the pristine films.…”

Section: Introductionmentioning

confidence: 89%

“…In the authors' previous study, the conductivity of PEDOT:PSS was increased by introducing small amounts of an electron-accepting (electron-withdrawing) dye molecule of methyl red (MR) [25]. In this work, the same simple solution-processed doping method with a higher MR concentration was applied to pristine (untreated) PEDOT:PSS (PH1000) to further increase its electrical conductivity through the addition of extra charge carriers.…”

Section: Introductionmentioning

confidence: 99%

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Solution-processed colored electrodes for ITO-free blue phosphorescent organic light-emitting diodes

Huseynova

Lim

Gasonoo

et al. 2020

Journal of Information Display

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Reported herein are solution-processed polymer anode electrodes for blue phosphorescent organic light-emitting diodes (PhOLEDs). The highly conductive anodes were made from 10-wt%-methylred-(MR)-doped poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) (PH1000) films. The red-colored and uniform polymer films demonstrated electrical conductivity values that significantly increased from 0.25 to 50 S•cm −1 after doping. The more than 200-fold enhancement in conductivity indicates that the doped films have a lower sheet resistance and better hole injection and transport properties than the pristine films. The resultant PhOLEDs based on the doped polymer anodes exhibited stable, broad, and intense blue emission at 468 nm with a 2616 cd•m −2 maximum luminance and a 4 V turn-on voltage. The obtained study results confirmed the effectiveness of the MR dye as a dopant for the significant enhancement of the conductivity and effective hole injection of PEDOT:PSS. Efficient future flexible optoelectronic applications can be built using this highly conductive polymer electrode obtained via a simple, solution-processed, and cost-effective doping approach.

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Transparent Organic Light‐Emitting Diodes: Advances, Prospects, and Challenges

Huseynova

Lee

Kim

et al. 2021

Advanced Optical Materials

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Transparent organic light‐emitting diodes (TOLEDs) are exciting next‐generation electronic devices that can be embedded and integrated into walls, windows, head‐up panels in commercial and domestic buildings, cars, planes, and other segments of the consumer goods sector. TOLEDs are also fundamental components for the realization of the stacked OLEDs for various industrial and research applications. Furthermore, futuristic smart wearables for clothing as well as medical purposes will also benefit remarkably from the development of TOLEDs. However, the efficiency of TOLEDs is significantly lower than that of their opaque counterparts. The achievement of high‐performance TOLEDs is directly dependent on the properties of the chosen electrode materials as well as the used light extraction techniques. In this review, the reported perspectives of TOLEDs are discussed along with their types, design, and architectures, applied TOLED materials and properties, and the application fields of these transparent devices. The performance of the electrode materials and the commonly used light extraction methods are reviewed in detail as well. The main purpose is to shed light on some of the effective TOLED approaches and the underlying reasons for the frequently encountered issues in these diodes. Auspicious novel fabrication techniques as well as device structures are also highlighted.

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Dye-doped poly(3,4-Ethylenedioxythiophene)-Poly(Styrenesulfonate) electrodes for the application in organic light-emitting diodes

Cited by 7 publications

References 45 publications

Doping Approaches for Organic Semiconductors

Doping Approaches for Organic Semiconductors

Solution-processed colored electrodes for ITO-free blue phosphorescent organic light-emitting diodes

Transparent Organic Light‐Emitting Diodes: Advances, Prospects, and Challenges

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