Linear and nonlinear optical properties of the conjugated polymers PPV and MEH-PPV
نویسندگان
چکیده
منابع مشابه
An order-disorder transition in the conjugated polymer MEH-PPV.
The poly(p-phenylene vinylene) derivative MEH-PPV is known to exist as two morphologically distinct species, referred to as red phase and blue phase. We show here that the transition from the blue phase to the red phase is a critical phenomenon that can be quantitatively described as a second order phase transition with a critical temperature T(c) of 204 K. The criticality is associated with th...
متن کاملPhotoluminescence of MEH-PPV/PS Blends
In this work we studied the optical properties of poly[2-methoxy-5-(2’-ethylhexyloxy)-p-phenylene vinylene] (MEH-PPV) using polymeric blends with polystyrene (PS). The photoluminescence (PL) spectrum of MEHPPV present three characteristic peaks correlating to aggregate electronic transition at 608, 674 and 742 nm at 10K. An addition of PS in MEH-PPV films induces a red shift in the absorption s...
متن کاملStability of the J-V characteristics of (BEHP-PPV)-co-(MEH-PPV) based light-emitting diodes
0026-2714/$ see front matter 2009 Elsevier Ltd. A doi:10.1016/j.microrel.2009.07.053 * Corresponding author. Address: Sección de Electró Depto. de Ingeniería Electrica, Av. IPN No 2508, Apdo. DF, Mexico. Tel.: +52 55 57473786; fax: +52 55 5747 E-mail addresses: [email protected] (J.C. Sánc [email protected] (M. Estrada). This paper reports main characteristics of copolymer (BEHP-PPV)-co...
متن کاملSynthesis and luminescence of red MEH-PPV: P3OT polymer
This paper investigates the synthesis processes for poly(3-octylthiophene) (P3OT) and poly[2-methoxy-5-(2 0-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV). The proton nuclear magnetic resonance (H NMR) and the Fourier transform infrared spectrophotometer (FTIR) were used to identify the chemical structure and functional group of synthesized polymers, respectively. The efficient Förster energy ...
متن کاملInterchain and intrachain exciton transport in conjugated polymers: ultrafast studies of energy migration in aligned MEH-PPV/mesoporous silica composites
In this paper, we show how composite samples consisting of chains of the semiconducting polymer MEH-PPV embedded into the channels of oriented, hexagonal nanoporous silica glass allow control over energy transfer and exciton migration in the polymer. The composite samples are characterized by two polymer environments: randomly oriented and ®lm-like segments with short conjugationlength outside ...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1999
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.59.15133