Thickness effects of conducting polymer as an ITO replacement on electroluminescent devices

Lee, Kwaung Youn; Kim, Young Kwan; Kwon, Oh Kwan; Lee, Ju Won; Shin, Dongwoon; Kim, Duck Young; Sohn, Byoung Chung; Choi, Don Soo

doi:10.1016/s0040-6090(99)01045-7

Cited by 9 publications

(6 citation statements)

References 4 publications

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“…However, due to the fact that indium is becoming more and more expensive, a lot of efforts have been made to investigate materials alternative to ITO, such as LaCuOSe:Mg ͑Ref. 3͒ or organic materials ͓polyaniline, 4 polypyrrole, 5 poly͑3, 4-ethylenedioxythiophene͒, 6 and polyphenyldiamine ͑Ref. 7͔͒.…”

Section: Introductionmentioning

confidence: 99%

The properties of tris (8-hydroxyquinoline) aluminum organic light emitting diode with undoped zinc oxide anode layer

Luka¹,

Stakhira²,

Cherpak³

et al. 2010

Journal of Applied Physics

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Transparent and conductive undoped zinc oxide films were prepared by atomic layer deposition method for use in tris (8-hydroxyquinoline) aluminum (Alq3)-based organic light emitting diodes. The properties of the ZnO layers were investigated. The ZnO/CuI/Alq3/poly(ethylene glycol) dimethyl ether/Al device turned on at 7.9 V and demonstrated external quantum efficiency of 1.5% which is better comparing to the same structure but with indium tin oxide as anode layer.

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Section: Introductionmentioning

confidence: 99%

The properties of tris (8-hydroxyquinoline) aluminum organic light emitting diode with undoped zinc oxide anode layer

Luka¹,

Stakhira²,

Cherpak³

et al. 2010

Journal of Applied Physics

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“…To study the correlation between the EL spectra of the europium complexes and the EL spectra of CBP:PS, an emissive layer without a europium complex was prepared and its EL spectrum recorded (Figure S12) in order to distinguish the emission of CBP:PS from the emission of the [Eu(tta) 3 L ] complexes. The PEDOT:PSS layer can act as a planarizing coating that inhibits electrical short‐circuiting and, thus, improves the lifetime . Thus, the usage of an additional PEDOT:PSS layer (45 nm thick) in the [Eu(tta) 3 L ]‐based devices was investigated.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Structure, Photoluminescence, and Electroluminescence of Four Europium Complexes: Fabrication of Pure Red Organic Light‐Emitting Diodes from Europium Complexes

et al. 2017

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Four new europium complexes were prepared by treating europium(III) trifluoro(thenoyl)acetonate trihydrate with new tridentate ligands, based on dipyrazolyltriazine and utilized as emitting materials in electroluminescent devices. The complexes were characterized by elemental analysis, FTIR spectroscopy, UV/Vis spectrophotometry, and 1H NMR spectroscopy. The coordinated ligands serve as light‐harvesting chromophores in the complexes, with absorption maxima in the range 334–402 nm [ε = (8.9–81.4) × 103 m–1 cm–1]. The ligands efficiently sensitize europium luminescence, with maximum quantum‐yield (QLEu) and observed lifetime (τobs) values of 34 % and 600 µs in the solid state and 35 % and 528 µs in toluene, respectively. The radiative lifetimes of Eu (5D0) are in the range 1170–1281 µs and the ligand‐to‐metal energy‐transfer efficiency (ηsens) is in the range 71–92 % for those complexes in the solid state and in the range 68–97 % for those in solution. Additionally, organic light‐emitting diodes (OLEDs), which exhibited pure red emission, were fabricated with europium(III) complexes. It is shown that by modifying the [Eu(tta)3·3H2O] molecule with ancillary ligands, one can tune and control its electroluminescence spectra, along with its electrical properties, such as the current/voltage characteristics of OLED devices based on [Eu(tta)3(L)]. The best OLED presented a maximum luminance of 3156 cd/m2 and a maximum efficiency of 0.7 cd/A at an applied voltage of 8 V.

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“…Electroluminescence (EL) performance of PLED is determined by intrinsic property of light emitting polymer (LEP),3, 4 device processing parameters,5–11 and device configuration 12. Charge balance throughout the device plays a key role for fabricating PLEDs with excellent EL properties, such as high brightness, high efficiency, and high operation stability 13–32…”

Section: Introductionmentioning

confidence: 99%

“…Adopting various strategies achieves a charge balance throughout the device resulting in PLED with excellent EL performance 13–31. Inorganic thin film and a charge‐transporting layer are typically inserted between a polymer light‐emitting layer and electrode interface to create a reduced energy barrier for balanced charge injection 13–21. The LiF insulating thin layer shows dramatic improvement of PLED quantum efficiency and lifetime due to better electron and hole current balance 13–16.…”

Section: Introductionmentioning

confidence: 99%

“…The LiF insulating thin layer shows dramatic improvement of PLED quantum efficiency and lifetime due to better electron and hole current balance 13–16. The hole‐transporting layer on the other hand, is usually inserted between the anode and polymer light‐emitting layer for reducing turn‐on voltage, and enhancing operational stability of PLEDs 17–19. Moreover, electron‐transporting layer insertion between the polymer emitting layer and cathode also improves EL performances 20, 21.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing the electroluminescence performances of blue polymer light emitting devices via carriers transporting materials incorporation

Lee

Hsu

Chan

et al. 2008

J of Applied Polymer Sci

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A series of polymer light emitting devices (PLEDs) based on the composite films of N-arylbenzimidazoles trimer (TPBI), poly (n-vinylcarbazole) (PVK), and a triarylaminooxadiazole-containing tetraphenylsilane light emitting polymer (PTOA) were investigated. Electroluminescence (EL) performance is enhanced with doped TPBI into the light-emitting layer for the PTOA-based devices. A deep blue emission (Commission Internationale de L'Eclairage (CIE x,y ) corodinates (0.16,0.06)) is obtained for the TPBI-PTOA-based device. Brightness and current efficiency of the TPBI-PTOA-based device can be as high as 961 cd/m 2 and 1.85 cd/A, respectively. The EL performances of TPBI-PTOA composite film-based devices are further enhanced by inserting a TPBI layer into the light emitting layer and cathode interface for a better electron and hole charge balance. Doping TPBI into the light-emitting layer of PVK-PTOA is not favorable for enhanced EL performances. Brightness and current efficiency reduced with increasing TPBI content for the TPBI-PVK-PTOA-based devices. Similar results are obtained for devices based on the TPBI-PVK-PTOA/TPBI bi-layer composite solid film. Morphology and charge balance effects on EL performances of TPBI-PTOA and TPBI-PVK-PTOA composite films based PLEDs are discussed in detail.

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Thickness effects of conducting polymer as an ITO replacement on electroluminescent devices

Cited by 9 publications

References 4 publications

The properties of tris (8-hydroxyquinoline) aluminum organic light emitting diode with undoped zinc oxide anode layer

The properties of tris (8-hydroxyquinoline) aluminum organic light emitting diode with undoped zinc oxide anode layer

Synthesis, Structure, Photoluminescence, and Electroluminescence of Four Europium Complexes: Fabrication of Pure Red Organic Light‐Emitting Diodes from Europium Complexes

Enhancing the electroluminescence performances of blue polymer light emitting devices via carriers transporting materials incorporation

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