Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Wilhelm Graupner"'
Autor:
John Houldcroft, Antonio Ciriello, Richard Osborne, Andrew Neil, Andrea Balcombe, Wilhelm Graupner, Philip Lawson
Publikováno v:
SAE International Journal of Engines. 9:1751-1762
Publikováno v:
ATZextra. 19:46-51
Autor:
Meera Chandrasekhar, Suchismita Guha, C. M. Martin, H. R. Chandrasekhar, Wilhelm Graupner, Qingsheng Cai
Publikováno v:
physica status solidi (b). 241:3339-3344
We present a low temperature study of the Raman modes in three oligo(para-phenylene) materials (p-terphenyl, 3P; p-quaterphenyl, 4P; and p-hexaphenyl, 6P) under hydrostatic pressure up to 80 kbar. The 1220 cm -1 (C-H in plane bend), 1280 cm -1 (C-C i
Autor:
Emil List, Wilhelm Graupner, Joseph Shinar, C.-H. Kim, B. L. Uhlhorn, Günther Leising, J. Partee
Publikováno v:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 361:1-6
Recent studies of frequency resolved DF due to T-T annihilation to singlet excitons (1S*) in π-conjugated polymers are reviewed, and the significance of this process is compared to that of other long-lived processses affecting the PL, in particular
Publikováno v:
Advanced Materials. 13:613-618
The effects of hydrostatic pressure on conjugated polymers, in particular polyphenyls (see Figure for monomer unit) have been studied using photoluminescence, absorption, photo-induced absorption, and Raman spectroscopy. The effect of pressure on the
Publikováno v:
Synthetic Metals. 121:1521-1524
We report the fabrication of thin organic layers and photovoltaic devices made from them. Building thin layers of organic materials via the method of ionically self-assembled monolayers (ISAM) provides control over the layer thickness and composition
Autor:
Francis Garnier, Maria Loi, Wilhelm Graupner, H. R. Chandrasekhar, A. Mura, Qingsheng Cai, Meera Chandrasekhar, C. M. Martin, Giovanni Bongiovanni
Publikováno v:
Physical Review Letters, 86(4), 732-735. AMER PHYSICAL SOC
We investigate the influence of interchain interactions on the photoluminescence processes in a sexithiophene single crystal by applying hydrostatic pressure. We perform transient photoluminescence spectroscopy in the time domain of 100 fs for pressu
Autor:
Wilhelm Graupner, Alexander Pogantsch, Emil List, K. Petritsch, C.-H. Kim, Joseph Shinar, Günther Leising
Publikováno v:
Synthetic Metals. 116:81-85
A new combined photoluminescence-detected magnetic resonance (PLDMR) and thermally stimulated current (TSC) study of defects in wide bandgap amorphous methyl-substituted ladder-type poly( para -phenylene) (m-LPPP) and polycrystalline para- hexaphenyl
Autor:
Christoph Gadermaier, Wilhelm Graupner, Kyoji Kaeriyama, Emil List, Jean-Jacques Pireaux, Antonio Andrea Mura, Giovanni Bongiovanni, Günther Leising, Maria Loi
Publikováno v:
Synthetic Metals, 111(3), 519-522. Elsevier Science
We have investigated the electronic properties and the photoluminescence (PL) decay of the poly-2,5-diheptyl-1,4-phenylene-alt-2,5-thienylene (PDHPT) copolymer made up by the regular alternation of high and low band-gap units. Experimental data show
Autor:
J. Partee, Günther Leising, Egbert Zojer, U. Scherf, Klaus Müllen, Joseph Shinar, Klaus Petritsch, Wilhelm Graupner, Emil List
Publikováno v:
Physical Review B. 61:10807-10814
The photophysics of methyl-bridged poly(para-phenylene)-type ladder polymer (m-LPPP) and oligomer films and solutions is described and discussed. The spin sensitive properties, such as the formation and properties of polaron pairs and triplet exciton