Structural Dependence of Photochromism in MEH-PPV Solutions
نویسندگان
چکیده
منابع مشابه
Characteristics of Dual Amplified Spontaneous Emission from MEH-PPV Solutions
We report the observations of dual wavelength amplified spontaneous emission from the solutions of a conjugated polymer poly [2-methoxy-5-(2-ethylhexyloxy)-1, 4-phenylenevinylene] (MEH-PPV) in Tetrahydrofuran and 1, 2 Dichlorobenzene. We have prepared MEH-PPV using a modified procedure and purified several times in each step, the material offers low molecular weight, low polydispersity index an...
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...
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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 ...
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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 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...
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ژورنال
عنوان ژورنال: Revista Processos Químicos
سال: 2015
ISSN: 1981-8521
DOI: 10.19142/rpq.v9i18.255