Intrachain exciton quenching analysis in conjugated polymers by two-photon spectroscopy

Autor: R. Schroeder, Ullrich Scherf, W. Graupner, B. Ullrich

Publikováno v: The Journal of Chemical Physics. 116:3449-3454

Intrachain exciton quenching in ladder-type polyparaphenylene has been quantified for the first time. Two-phonon absorption and subsequent upconverted photoluminescence of ladder-type polyparaphenylene and polyfluorene has been measured and analyzed

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::22ffb7f425fe97d78aa1ded9031b2521
https://doi.org/10.1063/1.1445108

Dissociation of hot excitons in ladder-type polymer light-emitting diodes

Autor: S. DeSilvestri, C. Zenz, Günther Leising, Guglielmo Lanzani, W. Graupner, Giulio Cerullo

Publikováno v: Chemical Physics Letters. 341:63-69

We present photocurrent excitation cross-correlation experiments which provide time-resolved information on the dissociation of photoexcited states in a prototypical π-conjugated polymer. A first pump pulse generates singlet exciton states (S 1 ) wh

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::802d60135107751bc46b8adcba8c6ff2
https://doi.org/10.1016/s0009-2614(01)00358-x

Excitation density and photoluminescence studies of polyfluorene excited by two-photon absorption

Autor: Bruno Ullrich, R. Schroeder, Ullrich Scherf, W. Graupner

Publikováno v: Journal of Physics: Condensed Matter. 13:L313-L318

Highly efficient photoluminescent organic materials are excellent alternatives to inorganic crystals for non-linear optics applications. One candidate, polyfluorene with an absorption onset of about 3 eV, was studied in this paper by means of transmi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7cfb095b60a1208eac2a16be556d10bc
https://doi.org/10.1088/0953-8984/13/16/102

Femtosecond photo-current excitation cross-correlation on a ladder type polymer

Autor: C. Zenz, Guglielmo Lanzani, Giulio Cerullo, S. DeSilvestri, Günther Leising, W. Graupner, Ullrich Scherf

Publikováno v: Synthetic Metals. 116:27-30

Transient photo-current cross-correlation experiments were carried out on methyl substituted ladder type poly(para-phenylene) ( m -LPPP). In this experiment, the first pulse at 390 nm creates singlet excitons (S 0 →S 1 ), that are re-exited to a hi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f7b23b69199a3af131b7a13a8f195c3d
https://doi.org/10.1016/s0379-6779(00)00508-7

High pressure study of the intramolecular vibrational modes in sexithiophene single crystals

Autor: Ma Loi, W. Graupner, Meera Chandrasekhar, Giovanni Bongiovanni, Francis Garnier, Qingsheng Cai, Chiara Botta, H. R. Chandrasekhar, Antonio Andrea Mura

Publikováno v: Synthetic Metals, 116(1), 321-326. Elsevier Science
Synthetic metals 116 (2001): 321–326. doi:10.1016/S0379-6779(00)00430-6
info:cnr-pdr/source/autori:M.A. Loi, Q. Cai, H.R. Chandrasekhar, M. Chandrasekhar, W. Graupner, G. Bongiovanni, A. Mura, C. Botta and F. Garnier/titolo:High pressure study of the intramolecular vibrational modes in sexithiophene single crystals/doi:10.1016%2FS0379-6779(00)00430-6/rivista:Synthetic metals/anno:2001/pagina_da:321/pagina_a:326/intervallo_pagine:321–326/volume:116

We report on the effects of a high hydrostatic pressure on the intra-molecular modes of a sexithiophene (T6) single crystal. Raman experiments were performed at low temperature up to a pressure of 80 kbar. We find that intermolecular interaction give

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8238c95b548be267e23d2aef24eed38e
https://doi.org/10.1016/s0379-6779(00)00430-6