Charge-induced defects in poly-phenylene-vinylene (PPV)
نویسندگان
چکیده
منابع مشابه
Theoretical studies of poly(para-phenylene vinylene) (PPV) and poly(para-phenylene) (PPP)
The electroluminescence from PPV and the blue light emission from PPP constitute exciting subjects of study. The band gap of these semiconducting polymers can be engineered in a wide range from red to ultraviolet by structural changes made on them. In the present work, we present a theoretical approach based on semiempirical and ab initio total energy and force calculations of PPV and PPP. We p...
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Electroluminescent conjugated polymers such as poly-(p-phenylene vinylene) (PPV) are at the brink of being extensively used commercially as light emitting devices. A continuous flow of both theoretical and experimental studies elucidate many still unresolved issues of polymer photophysics. Among the processes under debate are the different energy transfer pathways. This work studies one such pa...
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We report on time resolved photoluminescence (PLRT) measurements in poly(p-phenylene vinylene) (PPV) films irradiated by laser in the presence of air. We observe a PL intensity enhancement and a biexponential decay dynamics of PL signal for all irradiated films. These results can be understood in terms of a chain shortening process due to carbonyl incorporation and formation of an energy profil...
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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 کاملDNA-assisted photoinduced charge transfer between a cationic poly(phenylene vinylene) and a cationic fullerene.
Water-soluble cationic conjugated poly(phenylene vinylene) (PPV) and cationic fullerene were complexed with negatively charged single stranded DNA and double stranded DNA via electrostatic interactions to achieve photoinduced charge transfer with efficiencies as high as those observed from oppositely charged, cationic PPV and anionic fullerene but with distinctly different quenching mechanisms.
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ژورنال
عنوان ژورنال: Vacuum
سال: 2001
ISSN: 0042-207X
DOI: 10.1016/s0042-207x(01)00380-3