Organic light emitting diodes with nanostructured ultrathin layers at the interface between electron- and hole-transport layers

Kato, Keizo; Takahashi, Kuniyuki; Suzuki, Keisuke; Sato, Takayuki; Shinbo, Kazunari; Kaneko, Futao; Shimizu, H.; Tsuboi, Nobuyuki; Tadokoro, Toyoyasu; Ohta, Shin‐ichi

doi:10.1016/j.cap.2004.01.047

Cited by 12 publications

(10 citation statements)

References 7 publications

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“…IR spectra were performed on a Spectrum 2000 Perkin/Elmer FT IR using KBr discs in the range 400-4000 cm −1 and PE discs in the range 400-200 cm −1 . 1 H, 13 C NMR spectra were collected with a Bruker 400 MHz in CDCl 3 against TMS. The 1 H NMR spectrum of the nickel complex was recorded on a Bruker 700 MHz in CD 3 CN.…”

Section: Instrumentationmentioning

confidence: 99%

“…The 13 C NMR spectra of the free ligands revealed signals from C(4′)H-N and C(4″)H-N carbons in the region 163.59-170.60 ppm, whereas from C(1″) and C(1′) between 62.98 and 72.40 ppm. [29][30][31][32][33][34] Resonances of ipso carbons C(2) and C(2a) were observed at 167.36 and 157.83 ppm for (1), at 151.33 ppm and 157.97 ppm for (2), and at 157.81 and 163.49 ppm for (3).…”

Section: Papermentioning

confidence: 99%

“…These ligands revealed the N 2 O 2 chromophore groupanalogous to phthalocyanine (Pc) systems, which are used as thin films with electrical or optical properties. [8][9][10][11][12][13][14] The Pc and β-dikentonate copper(II) films were obtained by vacuum deposition and spin coating techniques. [8][9][10][11][12][13][14] Their properties were studied by AFM, SEM, and XPS and some of them were also characterized by EPR, Raman, UV-vis spectroscopy, X-ray diffraction or mass spectrometry.…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10][11][12][13][14] The Pc and β-dikentonate copper(II) films were obtained by vacuum deposition and spin coating techniques. [8][9][10][11][12][13][14] Their properties were studied by AFM, SEM, and XPS and some of them were also characterized by EPR, Raman, UV-vis spectroscopy, X-ray diffraction or mass spectrometry. 9 The thickness of a CuPc layer obtained by vacuum deposition ranged from 0.1 to 0.3 µm.…”

Section: Introductionmentioning

confidence: 99%

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New nickel(ii) and copper(ii) complexes with unsymmetrical Schiff bases derived from (1R,2R)(−)cyclohexanediamine and the application of Cu(ii) complexes for hybrid thin layers deposition

et al. 2013

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New unsymmetrical Schiff bases obtained by condensation of (1R,2R)(-)cyclohexanediamine with 2-hydroxy-3,5-di-tert-butylbenzaldehyde (3,5-(t)bba) and 2-hydroxy-3-methoxybenzaldehyde (3-metoxba) or 2-hydroxy-5-nitrobenzaldehyde (5-nba) and 2-hydroxyacetophenone (hacphen) were used for the synthesis of Cu(ii) and Ni(ii) complexes. The ligands and complexes were characterized by circular dichroism (CD), UV-vis, IR, (1)H (NOE diff) (ligand) and (13)C NMR (ligand) spectra. The X-ray crystal structures solved for Ni(II)(1R,2R)(-)chxn(3,5-(t)bba)(hacphen) exhibit distortion of the coordination sphere towards tetrahedral in the solid phase. The complex crystallized in the orthorhombic non-centrosymmetric P2(1)2(1)2(1) space group. Thin layers of copper(II) complexes were deposited on Si(111) by a spin coating technique and characterized by scanning electron microscopy (SEM/EDS), atomic force microscopy (AFM) and fluorescence spectroscopy. Layer deposition conditions were studied and optimal parameters were found (1500 rpm, time 30 s). For copper(ii) layers the most intensive fluorescence band from intraligand transition at 514 nm was observed. CD spectra of complexes in MeCN suggest the tetrahedral distortion from the square planar geometry of the central ion of the coordination sphere in solution. The (1)H NMR NOE diff. spectra of ligands were measured and the positions of the nearest hydrogen atoms in the cyclohexane and aromatic rings were discussed.

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Section: Instrumentationmentioning

confidence: 99%

Section: Papermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

New nickel(ii) and copper(ii) complexes with unsymmetrical Schiff bases derived from (1R,2R)(−)cyclohexanediamine and the application of Cu(ii) complexes for hybrid thin layers deposition

et al. 2013

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“…Though there have been several reports on the preparation ordered nanowires structure via LB technique, there has been a lack of preparing ordered conducting polymer nanowires through LB technique , and few reports have been done on the conducting property investigation of this ordered nanowire structure. As a promising conductive polymer, poly(3,4-ethylene dioxythiophene) (PEDOT) is suitable for OLED application due to its high conductivity, environmental stability and effective injection of carries in hole transfer layers [19][20][21][22] . Some works have also been attempted to prepare PEDOT nanomaterials for OLED applications.…”

Section: Introductionmentioning

confidence: 99%

Self-assembly of conducting polymer nanowires as hole injection layer for organic light-emitting diodes applications

Yang

Jiang

et al. 2010

SPIE Proceedings

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We reported a controlled architecture growth of high density and ordered nanowire film of poly(3,4-ethylene dioxythiophene) (PEDOT) via Langmuir-Blodgett (LB) technique, and self-assembly performance of PEDOT nanowires at air/water interface was investigated in detail. The conducting film consisting of high density and ordered nanowires was transferred onto ITO substrate as a hole injection layer for organic light emitting diodes (OLEDs). The results showed that, compared to conventional PEDOT film, the improved performance of OLEDs was obtained after using ordered PEDOT nanowire layer as hole injection layer. It also indicated that compact arrangement and well-ordered structure of conducting channel was attributed to the improvement of OLED performance, leading to the increase of charged carrier mobility in hole injection layer and the recombination rate of electrons and holes in the electroluminescent layer.

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3D Hierarchical Gallium Oxynitride Nanostructures Decorated with Ag Nanoparticles Applied as Recyclable Substrates for Ultrasensitive SERS Sensing

Liu

Chen

et al. 2019

Adv Materials Inter

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Developing plasmon‐assisted semiconductor nanocomposites as multifunctional surface‐enhanced Raman scattering (SERS) substrate for detection as well as photodegradation of toxic organic pollutants appears to be a crucial step in upgrading the SERS technique to a quantitative analytical level. However, conventional photocatalytic semiconductor scaffolds are confined in ultraviolet‐light‐active metal oxide nanostructures (TiO2, ZnO, etc.). Herein, the scope of semiconductor scaffold is expanded to visible‐light‐active oxynitrides by developing a robust and ultrasensitive recyclable SERS substrate based on 3D hierarchical gallium oxynitrides (GaON) nanosheets loading with Ag nanoparticles (Ag NPs). Significantly, the bandgap of GaON nanosheets shrinks to 2.9 eV to enable visible‐light adsorption. The as‐fabricated SERS substrate shows a high sensitivity with enhancement factor of 5.2 × 107 in R6G detection, and yields a wide detection range of 1.0 × 10−6 –1.0 × 10−12 mol L−1. Assisted with the enhanced charge transfer by generating the Schottky contact at the metal/semiconductor interface and the electron traps played by the residue oxygen, the Ag/GaON nanocomposites show attractive recyclability at visible‐light irradiation with well‐maintained SERS activity after four cycles. This work demonstrates the superiority of taking advantage of plasmon‐assisted oxynitride semiconductors as a high‐performance SERS platform and provides new opportunities for developing robust visible‐light‐driven recyclable SERS substrates.

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Organic light emitting diodes with nanostructured ultrathin layers at the interface between electron- and hole-transport layers

Cited by 12 publications

References 7 publications

New nickel(ii) and copper(ii) complexes with unsymmetrical Schiff bases derived from (1R,2R)(−)cyclohexanediamine and the application of Cu(ii) complexes for hybrid thin layers deposition

New nickel(ii) and copper(ii) complexes with unsymmetrical Schiff bases derived from (1R,2R)(−)cyclohexanediamine and the application of Cu(ii) complexes for hybrid thin layers deposition

Self-assembly of conducting polymer nanowires as hole injection layer for organic light-emitting diodes applications

3D Hierarchical Gallium Oxynitride Nanostructures Decorated with Ag Nanoparticles Applied as Recyclable Substrates for Ultrasensitive SERS Sensing

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