Influence from the sulfonate group () on the conversion process and emission efficiency of poly(p-phenylene vinylene)

Marletta, Alexandre; Silva, George B.; Silva, R.A.; Santos, David S. dos; Oliveira, Osvaldo N.

doi:10.1016/j.jlumin.2010.02.030

Cited by 3 publications

(3 citation statements)

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“…All samples were cast-deposited and stored, protected from any light, for the period of 24 hours for water evaporation. After that, the samples were heated at 110°C for 30 minutes in air and in a homemade oven, according to [20]. The UV-Vis absorbance was measured by using a DT-Mini-2-GS model UV-Vis lamp and an USB-4000 minispectrometer (Ocean Optics).…”

Section: Methodsmentioning

confidence: 99%

“…Many synthetic dyes exhibit this group and have been used to help the conversion of PPV [20]. In this work we used the dye Reactive Black 5 to produce PPV thin films from the alternative route proposed by Marletta et al [19,20]. It was observed that, in addition to allowing the conversion of the PPV precursor at lower temperatures, the PPV:dye film presented an absorption band extended to longer wavelengths, which is broader than absorbance of PPV produced without the dye.…”

Section: Introductionmentioning

confidence: 95%

“…To reduce the harmful effect of the thermal treatment, PPV can be produced by an alternative route in which a compound having a SO 3 -group is incorporated [19] (Figure 1 [19]. Many synthetic dyes exhibit this group and have been used to help the conversion of PPV [20]. In this work we used the dye Reactive Black 5 to produce PPV thin films from the alternative route proposed by Marletta et al [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Influence of TiO2 nanoparticles on the optical and structural properties of PPV thin films converted at low temperatures

Rostirolla¹,

Laureto²,

Silva³

et al. 2013

Express Polym. Lett.

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Abstract. In this work we studied the optical properties of poly(p-phenylene vinylene) (PPV) produced by the thermal conversion of a precursor polymer blended with a synthetic dye (Reactive Black 5). The production of PPV by this method decreases the overall time and cost of the process. We observed that the introduction of the dye resulted in an additional absorbance band near 550-700 nm, which can be beneficial to the photon harvesting capacity of the polymer if it is used as the donor material in a photovoltaic device. We studied how the optical and structures properties of this blend change when different quantities of TiO 2 nanoparticles are introduced. For that, thin films were produced by the cast deposition of pre-PPV:dye:TiO 2 . The scanning electronic microscopic images showed that the inorganic semiconductor form large agglomerates of approximately 200 nm, indicating a very rough surface where the dye can be adsorbed. The analysis of photoluminescence and Raman peaks indicated a reduction of the mean conjugation length of the polymer chains in the presence of TiO 2 nanoparticles.

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Section: Methodsmentioning

confidence: 99%