Exciton Dynamics in soluble Poly(p-phenylene-vinylene): Towards an Ultrafast Excitonic Switch
نویسندگان
چکیده
منابع مشابه
Singlet exciton binding energy in poly(phenylene vinylene).
The exciton binding energy (E(b)) and the band gap energy (E(g)) of poly(phenylene vinylene) are determined by high-resolution measurements of the photoconductivity excitation profile as a function of light polarization, applied electric field, and temperature. At high applied electric fields, a peak in the photoconductivity is observed when the sample is pumped at a photon energy just below th...
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L. Kulikovsky, D. Neher,* E. Mecher, K. Meerholz, H.-H. Hörhold, and O. Ostroverkhova University of Potsdam, Institute for Physics, Am Neuen Palais 10, 14469 Potsdam, Germany 2 Department of Physical Chemistry, University of Köln, Luxemburgerstrasse 116, 50939 Köln, Germany Friedrich-Schiller-Universität, Institute for Organic Chemistry and Macromolecular Chemistry, Humboldtstraße 10, 07743 Jen...
متن کاملAb initio dynamics study of poly-para-phenylene vinylene.
We present an ab initio dynamics investigation within a density-functional perturbation theory framework of the properties of the conjugated polymer poly-para-phenylene vinylene (PPV) in both the isolated chain and crystalline states. The calculated results show that for an isolated chain, most of the vibrational modes correspond to experimentally observed modes in crystalline PPV. However, add...
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متن کاملComment on "triplet-to-singlet exciton formation in poly(p-phenylene-vinylene) light-emitting diodes".
The triplet to singlet exciton formation ratio in a MEH-PPV light-emitting diode is measured by comparing the triplet-induced absorptions with optical and electric excitations at the same singlet exciton density. The ratio is a strong universal decreasing function of the averaged electric field. Using 4 ns for singlet to triplet intersystem crossing time, the ratio is significantly larger than ...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1997
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.78.4285