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Showing papers in "Organic Electronics in 2008"


Journal ArticleDOI
TL;DR: In this article, thermal annealing of spin-coated poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) thin films deposited from aqueous dispersion using different concentrations of sorbitol has been studied.

626 citations


Journal ArticleDOI
TL;DR: In this article, the diffusion and recombination in an absorber blend of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM) with indium tin oxide (ITO) and aluminium contacts have been analyzed in the dark by means of impedance spectroscopy.

547 citations


Journal ArticleDOI
TL;DR: In this paper, the electronic structure at the interfaces of 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA) and the metal surfaces Au(1,1), Ag(1,1), and Cu(1 1/1/1) was investigated using ultraviolet photoelectron spectroscopy (UPS).

207 citations


Journal ArticleDOI
TL;DR: In this article, the role of molybdenum oxide (MoO3) and MoO3 doped N,N′-di(naphthalene-1-yl) and N, N′-diphenyl-benzidine (NPB) as interface modification layer on ITO in improvement of the efficiency and stability of organic light-emitting diodes (OLEDs) is investigated in detail by atomic force microscopy (AFM), polarized optical microscopy, transmission spectra, ultraviolet photoemission spectroscopy (U

150 citations


Journal ArticleDOI
TL;DR: In this article, the authors demonstrate the direct transfer of unstrained metals via cold welding onto preformed, 1.0 cm radius plastic hemispheres with micrometer scale feature resolutions to realize 10kilopixel organic photodetector focal plane arrays (FPAs) that mimic the size, function, and architecture of the human eye.

141 citations


Journal ArticleDOI
TL;DR: In this article, the lifetime of a poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61 butyric acid methyl ester (PCBM) heterojunction photodiode structure was increased to several thousand hours by omitting the widely used poly (3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) (PSS) anode layer.

132 citations


Journal ArticleDOI
TL;DR: In this paper, an appropriately oriented dipole layer between contact and semiconductor in organic thin-film transistors (OTFTs) is proposed to improve charge injection by interposing an appropriate oriented dipoles layer between the contact and the semiconductor.

124 citations


Journal ArticleDOI
TL;DR: In this paper, the performance improvement of organic thin-film transistor (OTFT) with a solution based TIPS pentacene (6,13-bis(triisopropylsilylethynyl)pentacene) by inkjet printing was studied.

123 citations


Journal ArticleDOI
TL;DR: In this paper, a planar surface cell geometry (anode as well as the cathode are made of gold; interelectrode spacing: 1μm) by means of inkjet printing is presented.

117 citations


Journal ArticleDOI
TL;DR: In this paper, a generalized methodology is developed to obtain the currentvoltage characteristic of polymer tandem solar cells by knowing the electrical performance of both sub cells, which can be used to predict the electrical characteristics of both the series and parallel connection of the sub cells.

116 citations


Journal ArticleDOI
TL;DR: In this article, thin P(VDF-TrFE) film samples spin-coated on metallized plastic substrates were stretchannealed to attain a topographically flat-grain structure and greatly reduce the surface roughness and current leakage of semi-crystalline copolymer film, while enhancing the preferred β-phase of the ferroelectric films.

Journal ArticleDOI
TL;DR: In this article, the effect of alkyl thiol addition into bulk-heterojunction solar cells, based on poly(3hexylthiophene) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM) mixtures, was studied.

Journal ArticleDOI
TL;DR: In this article, an organic p-i-n CuPc homojunction was constructed using F4-TCNQ and decamethylcobaltocene (DMC) as p-and n-dopants.

Journal ArticleDOI
TL;DR: In this paper, the effects of doping molybdenum trioxide (MoO 3 ) in N, N Δ-diphenyl- N, N D-bis(1, 1′)-4, 4′-diamine (NPB) are studied at various thicknesses of doped layer (25-500 A) by measuring the currentvoltage characteristics, the capacitance voltage characteristics and the operating lifetime.

Journal ArticleDOI
TL;DR: In this paper, a highly conductive poly(3,4-ethylenedioxythiophene) (PEDOT) film was prepared by in-situ oxidative polymerization on a glass substrate and adopted as the transparent anode of polymer solar cells that were based on a blend of poly( 3-hexylthiophene), P3HT and [6,6]-phenyl C 61 butyric acid methyl ester (PCBM) as the photoactive layer.

Journal ArticleDOI
TL;DR: In this article, the gate bias stress in TFTs with a hydroxyl-free and amorphous fluoropolymer as gate insulator was investigated, and the air stability of threshold voltages was investigated.

Journal ArticleDOI
TL;DR: In this article, the morphology of 6T:C60 blends strongly depending on the composition of the mixture of oligothiophen and fullerene, and the morphology was obtained only for films deposited with the co-evaporation of excess C60.

Journal ArticleDOI
TL;DR: In this article, the effect of water in ambient air on the hysteresis phenomena of pentacene field effect transistors with polymer/SiO2 gate dielectrics was investigated.

Journal ArticleDOI
TL;DR: In this article, all-printed low-voltage organic transistors were manufactured on a plastic substrate and measured in normal room atmosphere, and changes in transistor characteristics after 48 days of ageing in room atmosphere were mainly attributed to a reduced conductivity of the polymer gate electrode.

Journal ArticleDOI
TL;DR: In this paper, the electron and hole mobilities for prototypical polycyclic hydrocarbon molecules, perylothiophene (pet) and benzo(g,h,i)-perylene (bnpery), were calculated using electron transfer theory coupled with a diabatic model and a homogeneous diffusion assumption to obtain the charge mobility.

Journal ArticleDOI
TL;DR: In this article, functionalized multiwalled carbon nanotubes (CNTs) were added to poly(3-hexylthiophene) (P3HT) field effect transistors (FETs) prior to film formation.

Journal ArticleDOI
TL;DR: In this paper, gold electrodes were coated with poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) in order to reduce the contact resistance in pentacene organic field-effect transistors (OFETs).

Journal ArticleDOI
TL;DR: In this paper, the authors demonstrate power conversion efficiencies of 1.5% from molecular photovoltaic devices based on bilayer pentacene/fullerene heterojunctions under 1 sun AM1.5G simulated irradiation.

Journal ArticleDOI
TL;DR: In this paper, a poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM) and incorporating one-dimensional nanostructured acid-doped polyaniline nanotubes (a-PANINs) as an interfacial layer.

Journal ArticleDOI
TL;DR: In this article, an efficient top-emitting organic light emitting diodes were fabricated using copper iodide (CuI) doped 1,4-bis[N-(1-naphthyl)-N′-phenylamino]-4,4′-diamine (NPB) as a hole injection layer and Ir(ppy)3 doped CBP as the emitting layer.

Journal ArticleDOI
Dipti Gupta1, Namho Jeon1, Seunghyup Yoo1
TL;DR: In this paper, the authors analyzed the device characteristics of organic thin-film transistors (OTFT) fabricated using trisopropylsilylethynyl (TIPS)-pentacene with the help of a two-dimensional physics-based numerical simulation.

Journal ArticleDOI
TL;DR: In this article, dual-gate OFETs were characterized in double-gate mode by sweeping the bottom gate bias from 40 to −50 V while fixing the top gate potentials, and vice versa.

Journal ArticleDOI
TL;DR: In this article, the desired properties of a conjugated polymer-electrolyte blend in a light-emitting electrochemical cell were investigated in terms of properties of conjugation.

Journal ArticleDOI
TL;DR: In this article, a tetracene derivative, 5,6,11,12-tetrachlorotetracene, was synthesized and crystallized to achieve different molecular arrangements.

Journal ArticleDOI
TL;DR: In this paper, the authors report on mobilities up to 3.6 cm 2 /V s in organic field effect transistors (OFETs) with solution-processed dithiophene- and dibenzo-tetrathiafulvalene (DT- and DB-TTF) single crystals as active materials.