Studies of MEH-PPV and MEH-PPV/MCMB Films and their Light Absorption in the Red Wavelength Region of the Visible Spectrum

Nor Diyana Abdul Aziz; Roshidah Rusdi; Norlida Kamarulzaman

doi:10.4028/www.scientific.net/AMR.545.308

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 545Studies of MEH-PPV and MEH-PPV/MCMB Films and...

Studies of MEH-PPV and MEH-PPV/MCMB Films and their Light Absorption in the Red Wavelength Region of the Visible Spectrum

Abstract:

Poly [2-methoxy, 5-(2-ethyl-hexyloxy)-p-phenylene-vinylene] (MEH-PPV) is a conjugated polymer that exhibit excellent luminescence properties in the visible spectrum. The fundamental absorption edge in the film is formed by the direct allowed transitions. In this work, free-standing films of MEH-PPV and MEH-PPV/MCMB were obtained by a solvent casting method. Mesocarbon Microbead (MCMB), a type of carbon, is added to the polymer producing composite films. The films were characterized by using the UV-Vis-NIR spectrophotometer. The film samples exhibited an absorption band in the red visible region. This is due to the electron transition between the non-localized bands. However, when MCMB is doped into the polymer matrix, the band absorption edge is red-shifted compared to that of the MEH-PPV pure film. Therefore, the optical band gaps of the composite films have decreased due to the presence of MCMB.

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Periodical:

Advanced Materials Research (Volume 545)

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308-311

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https://doi.org/10.4028/www.scientific.net/AMR.545.308

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July 2012

Authors:

Nor Diyana Abdul Aziz, Roshidah Rusdi, Norlida Kamarulzaman

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MEH-PPV Film, Optical Band Gap, UV-Vis NIR

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