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Showing papers in "Organic Electronics in 2007"


Journal ArticleDOI
TL;DR: This report reports on the first successful fabrication of an integrated circuit solely by means of fast, continuous mass-printing technology, using a seven-stage ring oscillator which delivers an ac-signal with a frequency of approximately 4 Hz.

154 citations


Journal ArticleDOI
TL;DR: In this paper, the Induced Density of Interface States model is revisited and discussed for weakly-interacting organic semiconductor junctions for Au/organic interfaces, and the results of the analysis in terms of the organic charge neutrality level and the corresponding (SMO or SOO) slope parameter provide a consistent and predictive description of energy level alignment at these interfaces.

145 citations


Journal ArticleDOI
TL;DR: In this article, high performance pentacene field effect transistors have been fabricated using Al2O3 as a gate dielectric material grown by atomic layer deposition (ALD).

133 citations


Journal ArticleDOI
TL;DR: In this paper, a transition between two different energy level alignment regimes has been observed: namely vacuum level alignment and Fermi level pinning, which is associated with spontaneous positive charge transfer across the interface to the organic semiconductors above a certain material-specific threshold value of ϕ s.

132 citations


Journal ArticleDOI
TL;DR: In this article, scattering films on the viewer's side of the substrate were used to increase the outcoupling efficiency of OLEDs for lighting applications, and experimental results showed that the increase of outcouple efficiency is dependent from the absolute number of scattering particles in the matrix.

128 citations


Journal ArticleDOI
TL;DR: In this article, a flexible polymer memory device is demonstrated in a sandwich structure of polypyrrole/P6FBEu/Au, which can be used as a write-once read-many-times (WORM) memory with good electronic stability.

118 citations


Journal ArticleDOI
TL;DR: In this paper, the authors used ultraviolet photoelectron spectroscopy (UPS) to determine the energy level alignment at organic-organic conductor and semiconductor-semiconductor hetero-interfaces that are relevant for organic optoelectronic devices.

115 citations


Journal ArticleDOI
TL;DR: In this article, the deoxyribonucleic acid (DNA) bio-polymers derived from fish waste products are employed as gate dielectric in n-type methanofullerene and p-type pentacene based organic field effect transistors working at low voltage levels and low gate leakage currents.

112 citations


Journal ArticleDOI
TL;DR: In this paper, the strong coupling limit of cavity quantum electrodynamics (QED) was reached at room temperature with large coupling strengths (Rabi-splitting >250 meV) in exciton-polariton microcavity structures.

109 citations


Journal ArticleDOI
TL;DR: The field of strong exciton-photon coupling in organic materials has progressed at a rapid pace since the first observation of microcavity polaritons in tetra-(2,6-t-butyl)phenol-porphyrin zinc less than 10 years ago as mentioned in this paper.

97 citations


Journal ArticleDOI
TL;DR: In this paper, the effect of pentacene crystalline domain size on performance was investigated by controlling the Pentacene deposition rate, which showed improved light-to-electricity conversion efficiencies from 0.49% to 1.12% under an AM 1.5 solar simulator (100mW/cm 2 ).

Journal ArticleDOI
TL;DR: In this article, the influence of environmental conditions on the device operation and the stability of polycrystalline pentacene thin film transistors (TFTs) was investigated.

Journal ArticleDOI
TL;DR: In this paper, the dissociation and photochemical behavior of different organic semiconductor materials typically employed in organic light emitting diodes (OLED) and other organic electronic devices, using laser desorption/ionization time-of-flight mass spectrometry (LDI-TOF-MS) was investigated.

Journal ArticleDOI
TL;DR: In this article, the authors investigated the morphology and chemical composition of degraded micro-areas created in organic light-emitting diodes (OLEDs) under different environment.

Journal ArticleDOI
TL;DR: In this paper, the authors explore the realization of inorganic capping layers by atomic layer deposition (ALD) that provides smooth and pinhole-free films with a great potential as passivation layer for organic based devices.

Journal ArticleDOI
TL;DR: In this paper, the presence of impurities in the different fractions of P3HT is shown to affect not only the characteristics of the OFETs but also the photovoltaic performances.

Journal ArticleDOI
TL;DR: In this article, the X-ray and ultraviolet photoelectron spectroscopies (XPS, UPS) were used to characterize the NiPc thin films and obtained a hole injection barrier of 0.90 − 0.10 eV.

Journal ArticleDOI
TL;DR: In this article, the synthesis of cationic water-soluble polyfluorene derivatives with various side groups, which are used as electron injecting layers in polymer light emitting diodes, is described.

Journal ArticleDOI
TL;DR: The structural and optical properties of semiconductor block copolymers containing triphenylamine as hole transport material and perylene bisimide as dye and electron transport material are reported in this paper.

Journal ArticleDOI
TL;DR: In this article, a special design of electrochemical cell allowed us to electrodeposit films of conducting polymer over large areas, which is a fast and straightforward way to assemble sealed and solid-state devices.

Journal ArticleDOI
TL;DR: In this paper, anisotropic terfluorene films exhibit higher gain and lower threshold than the isotropic films, due to larger confinement of the wave-guided mode and larger cross section of stimulated emission.

Journal ArticleDOI
TL;DR: In this article, the effects of the polar functional groups and rough topography of the gate dielectric layer on the characteristics of pentacene field effect transistors were analyzed. But the authors did not consider the effect of the number of polar groups.

Journal ArticleDOI
TL;DR: In this article, dual-gate pentacene organic thin-film transistors (OTFTs) with bottom-gate and top-gate dielectric were fabricated using PEALD Al2O3 gate dielectrics.

Journal ArticleDOI
TL;DR: In this paper, a close-packed hexagonal silica microsphere arrays is pressed into polyvinyl alcohol layer that is spincoated on the opposite side of the indium-tin-oxide-coated glass substrate.

Journal ArticleDOI
TL;DR: In this paper, a mechanism of negative polarization-compensating charges which are injected to the insulator region next to the semiconductor layer was proposed and examined to understand the phenomenon of large positive shifts of turn-on voltage Vto were observed in ferroelectric organic thin film transistor using P(VDF-TrFE) copolymer as gate insulator during OFF to ON state sweeping.

Journal ArticleDOI
TL;DR: In this paper, three new compounds based on indolo[3,2-b] carbazole, 2,8-bis(4-diphenylaminophenyl)-5,11-di-n-octylindolo [3, 2-b]-carbazole (BTOICZ), 2, 8-bis[N-(n-butyl)carbazolyl]-5, 11-di n-ortho-indolindolo[ 3,2b]-carbazole(BCOICZ) and

Journal ArticleDOI
TL;DR: In this paper, it is shown that the plasmon modes associated with the two metal surfaces of the cathode must be coupled together in order to maximize the SPP-mediated light emission in an organic light-emitting diode (TOLED).

Journal ArticleDOI
TL;DR: In this paper, the AIM-SPICE model was developed for the electrical simulation of all printed polymer circuits, which is based on an a-silicon approach and allows to model all-printed polymer transistors and circuits.

Journal ArticleDOI
TL;DR: The substitution of the bulky substituents, such as the triphenylsilyl groups, on the 9,10 positions of anthracene produced a remarkable increase in Φ f, and the substitution controlled the intermolecular stacking by diminishing the electroplex formation and inter- and intra-molescular photochemical reactions.

Journal ArticleDOI
TL;DR: In this paper, the use of micromolding in capillaries (MIMIC) and microtransfer printing (μTP) as two soft-lithographic techniques for the fabrication of silver source/drain electrodes in well-performing bottom-gate/bottom-contact organic field effect transistors (OFETs) with poly(3-hexylthiophene) as active layer material.