Results 261 to 270 of about 117,054 (296)

Electroabsorption studies of PPV and MEH-PPV

Optical Materials, 1998
Abstract We report the results of an electroabsorption (EA) spectroscopy study of the electronic structure of the conjugated polymer PPV and its soluble derivative MEH-PPV. We find that the EA response of both polymers is dominated by a Stark shift of the 1Bu exciton.
S.J. Martin, Helen Mellor, Donal D.C. Bradley, P.L. Burn   +3 more
openaire   +1 more source

Photoconduction Effect on PPV and MH-PPV Structures

Molecular Crystals and Liquid Crystals, 2002
In this paper we present the photoconduction effect of the poly( p -phenylenevinylene) (PPV) and its derivative, the poly[(2-methoxy-5-hexyloxy)-p-phenylenevinylene] (MH-PPV). The structures used to study photoconductivity were prepared using solutions of either PPV-precursor in methanol or MH-PPV in chloroform, both spin-coated on an interdigitated ...
Clarissa De Almeida Olivati, Rodrigo Fernando Bianchi, Flavia Maria Marconi, Debora Terezia Balogh, Roberto Mendonca Faria   +4 more
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Ultra-photostable n-type PPVs

Chemical Communications, 2005
Poly(p-phenylenevinylene)s containing trifluoromethyl substituted aromatic rings (CF3-PPVs) exhibit high photooxidative stability to give robust materials suitable for demanding applications.
Youngmi, Kim, Timothy M, Swager
openaire   +2 more sources

Anisotropic electron mobility in fluorene-PPV and fluorene-MEH-PPV

Molecular Physics, 2016
ABSTRACTPolyfluorene copolymers are attractive semiconductor materials, in particular for applications in the organic electronics field. They are versatile to be chemically modified and allow a tuning of the emission to cover the entire visible spectrum.
Carlos E. T. Magalhães, Marcio M. da Silva, Ranylson M. L. Savedra, Melissa F. Siqueira   +3 more
openaire   +1 more source

Radiative recombination studies on PPV and PPV SWNT composites

Synthetic Metals, 2003
Luminescence data on PPV and PPV SWNT composites exhibit two main peaks (at 515 and 545nm) whose relative intensities depend on the preparation conditions and on the excitation wavelengths. In general the high energy peak intensity decreases for increasing wavelengths.
Mulazzi E, Perego R, Botta C, Bolognesi A, Wéry J, Arab H, Faulques E, Lefrant S   +7 more
openaire   +3 more sources

Conductivity Studies of MEH-PPV and MEH-PPV∕Super P Films

AIP Conference Proceedings, 2011
Poly [2‐methoxy, 5‐(2‐ethyl‐hexyloxy)‐p‐phenylene‐vinylene] (MEH‐PPV) is one of the most widely studied conjugated polymers in the PPV family. MEH‐PPV is a very promising polymer for future applications in organic semiconducting electroluminescent electronic and optoelectronic devices.
Nor Diyana Abd Aziz, Norlida Kamarulzaman, Muhammed Hasan Aslan, Ahmet Yayuz Oral, Mehmet Özer, Süleyman Hikmet Çaglar   +5 more
openaire   +1 more source

Femtosecond Time-Resolved Photoluminescence Measurements of PPV, MEH-PPV and CN-PPV

1996
Conjugated polymers based on poly(arylenevinylene)s are of potential technological importance due to their electroluminescence properties1,2. In poly(p-phenylenevinylene) [PPV] and its soluble derivative poly(2-methoxy,5-(2’ethyl-hexyloxy)-p-phenylenevinylene) [MEH-PPV] the luminescence produced after photoexcitation or charge injection is attributed ...
G. R. Hayes, I. D. W. Samuel, R. T. Phillips   +2 more
openaire   +1 more source

An alkylsilylphenoxy PPV chromophore

Synthetic Metals, 2002
Abstract The synthesis and characterization of a poly( p -phenylene vinylene) (PPV) based chromophore containing a long chain alkylsilylphenoxy side group have been reported. Physical and electroluminescent (EL) properties of the green light emitting polymer, poly[2-4′-dimethyldodecylsilylphenyloxy-1,4-phenylene vinylene] (SiPhOPPV), in single and ...
Sung-Ho Jin, Hyung-Jong Lee, Yeong-Soon Gal, Taehyoung Zyung, Hyun-Nam Cho, E.Elif Gürel, F.E Karasz   +6 more
openaire   +1 more source

Optical and electrical properties of PPV/SiO2 and PPV/TiO2 composite materials

Composites Part A: Applied Science and Manufacturing, 2005
Abstract Composites made by incorporation of SiO2 or TiO2 nanoparticles into poly(p-phenylene vinylene) (PPV) have been fabricated and their optical and electrical properties have been investigated. The UV–vis absorption band of the composite films showed a large blue-shift with SiO2 nanoparticles, but only little difference with TiO2 nanoparticles ...
S.H. Yang, T.P. Nguyen, P. Le Rendu, C.S. Hsu   +3 more
openaire   +1 more source

Comparison of the electronic structure of PPV and its derivative DIOXA-PPV

Chemical Physics, 2006
Electronic structure of two conjugated polymers, PPV and its derivative DIOXA-PPV, are studied by quantum-chemistry methods. Good agreement between the calculations and available experimental data validates the applied methods and enables us to draw conclusions about properties of excitons and polarons in these polymers. In particular, simultaneous use
Mengtao Sun, Pär Kjellberg, Wichard J.D. Beenken, Tõnu Pullerits   +3 more
openaire   +1 more source