@article{ZenBilgeGalbrechtetal.2006,
  author    = {Zen, Achmad and Bilge, Askin and Galbrecht, Frank and Alle, Ronald and Meerholz, Klaus and Grenzer, J{\"o}rg and Neher, Dieter and Scherf, Ullrich and Farrell, Tony},
  title     = {Solution processable organic field-effect transistors utilizing an alpha,alpha '-dihexylpentathiophene- based swivel cruciform},
  doi       = {10.1021/Ja0573357},
  year      = {2006},
  language  = {en}
}
@article{IlnytskyiSaphiannikovaNeher2006,
  author    = {Ilnytskyi, Jaroslav and Saphiannikova, Marina and Neher, Dieter},
  title     = {Photo-induced deformations in azobenzene-containing side-chain polymers : molecular dynamics study},
  issn      = {1607-324X},
  year      = {2006},
  abstract  = {We perform molecular dynamics simulations of azobenzene containing side-chain liquid crystalline polymer subject to an external model field that mimicks the reorientations of the azobenzenes upon irradiation with polarized light. The smectic phase of the polymer is studied with the field applied parallel to the nematic director, forcing the trans isomers to reorient perpendicularly to the field (the direction of which can be assosiated with the light polarization). The coupling between the reorientation of azobenzenes and mechanical deformation of the sample is found to depend on the field strength. In a weak field the original smectic order is melted gradually with no apparent change in the simulation box shape, whereas in a strong field two regimes are observed. During the first one a rapid melting of the liquid crystalline order is accompanied by the contraction of the polymer along the field direction (the effect similar to the one observed experimentally in azopenzene containing elastomers). During the slower second regime, the smectic layers are rebuilt to accomodate the preferential direction of chromophores perperdicular to the field.},
  language  = {en}
}
@article{YangMuellerNeheretal.2006,
  author    = {Yang, Xiaohui and M{\"u}ller, David C. and Neher, Dieter and Meerholz, Klaus},
  title     = {Highly efficient polymeric electrophosphorescent diodes},
  year      = {2006},
  abstract  = {Polymeric electrophosphorescent LEDs with internal quantum efficiencies approaching unity have been fabricated. Such performance levels are previously unknown for OLEDs. The key to this success is redox chemically doped oxetane- crosslinkable hole-transporting layers with multilayer capability (see figure). They improve hole injection and act as electron-blocking layers, without the need to include exciton-or hole-blocking layers},
  language  = {en}
}
@article{MechauSaphiannikovaNeher2006,
  author    = {Mechau, Norman and Saphiannikova, Marina and Neher, Dieter},
  title     = {Molecular tracer diffusion in thin azobenzene polymer layers},
  series = {Applied physics letters},
  volume    = {89},
  journal   = {Applied physics letters},
  number    = {25},
  publisher = {Elsevier},
  address   = {Melville},
  issn      = {0003-6951},
  doi       = {10.1063/1.2405853},
  pages     = {3},
  year      = {2006},
  abstract  = {Translational diffusion of fluorescent tracer molecules in azobenzene polymer layers is studied at different temperatures and under illumination using the method of fluorescence recovery after photobleaching. Diffusion is clearly observed in the dark above the glass transition temperature, while homogeneous illumination at 488 nm and 100 mW/cm(2) does not cause any detectable diffusion of the dye molecules within azobenzene layers. This implies that the viscosity of azobenzene layers remains nearly unchanged under illumination with visible light in the absence of internal or external forces. (c) 2006 American Institute of Physics.},
  language  = {en}
}
@article{YangJaiserStilleretal.2006,
  author    = {Yang, Xiao Hui and Jaiser, Frank and Stiller, Burkhard and Neher, Dieter and Galbrecht, Frank and Scherf, Ullrich},
  title     = {Efficient polymer electrophosphoreseent devices with interfacial layers},
  series = {Advanced functional materials},
  volume    = {16},
  journal   = {Advanced functional materials},
  number    = {16},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {1616-301X},
  doi       = {10.1002/adfm.200500834},
  pages     = {2156 -- 2162},
  year      = {2006},
  abstract  = {It is shown that several polymers can form insoluble interfacial layers on a poly (ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) layer after annealing of the double-layer structure. The thickness of the interlayer is dependent on the characteristics of the underlying PEDOT.PSS and the molecular weight of the polymers. It is further shown that the electronic structures of the interlayer polymers have a significant effect on the properties of red-light-emitting polymer-based electrophosphorescent devices. Upon increasing the highest occupied molecular orbital and lowest unoccupied molecular orbital positions, a significant increase in current density and device efficiency is observed. This is attributed to efficient blocking of electrons in combination with direct injection of holes from the interlayer to the phosphorescent dye. Upon proper choice of the interlayer polymer, efficient red, polymer-based electrophosphorescent devices with a peak luminance efficiency of 5.5 cd A(-1) (external quantum efficiency = 6 \%) and a maximum power-conversion efficiency of 5 Im W-1 can be realized.},
  language  = {en}
}
@article{LuszczynskaDobruchowskaGlowackietal.2006,
  author    = {Luszczynska, Beata and Dobruchowska, Ewa and Glowacki, Ireneusz and Ulanski, Jacek and Jaiser, Frank and Yang, Xiaohui and Neher, Dieter and Danel, Andrzej},
  title     = {Poly(N-vinylcarbazole) doped with a pyrazoloquinoline dye : a deep blue light-emitting composite for light- emitting diode applications},
  issn      = {0021-8979},
  doi       = {10.1063/1.2162268},
  year      = {2006},
  abstract  = {We investigated the spectral properties of light-emitting diodes based on a deep blue-emitting pyrazoloquinoline dye doped into a poly(N-vinylcarbazole)-based matrix. Even though the electroluminescence (EL) of the host is redshifted and broadened with respect to the emission of the dye, the EL spectrum becomes fully dominated by the dye emission at concentrations of ca. 2 wt \%. This is attributed to a competition of exciplex formation on the matrix and exciton formation on the dye.},
  language  = {en}
}
@article{YangJaiserKlingeretal.2006,
  author    = {Yang, X. H. and Jaiser, Frank and Klinger, S and Neher, Dieter},
  title     = {Blue polymer electrophosphorescent devices with different electron-transporting oxadiazoles},
  doi       = {10.1063/1.2162693},
  year      = {2006},
  abstract  = {We report that the performances of blue polymer electrophosphorescent devices are crucially depending on the choice of the electron transporting material incorporated into the emissive layer. Devices with 1,3-bis[(4-tert- butylphenyl)-1,3,4-oxidiazolyl]phenylene (OXD-7) doped at similar to 40 wt\% into a poly(vinylcarbazole) matrix exhibited significantly higher efficiencies than those with 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD), yielding maximum luminous and power efficiency values of 18.2 Cd/A and 8.8 lm/W, respectively. Time resolved photoluminescence measurements revealed a long lifetime phosphorescence component in layers with PBD, which we assign to significant triplet harvesting by this electron-transporting component. (c) 2006 American Institute of Physics},
  language  = {en}
}