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  • 1
    Online Resource
    Online Resource
    Solvent Effects on the Electrical and Optical Properties of Nanocomposited MEH-PPV:TiO〈sub〉2〈/sub〉 Films for Organic Solar Cells Application
    Trans Tech Publications, Ltd. ; 2011
    In:  Advanced Materials Research Vol. 364 ( 2011-10), p. 86-89
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 364 ( 2011-10), p. 86-89
    Abstract: The influence of organic solvent on the electrical and optical behavior of poly [2-methoxy-5-(2-ethylhexyloxy-p-phenylene-vinylene)] (MEH-PPV): Titanium Dioxide (TiO 2 ) active layer has been investigated. The performance of the nanocomposite thin films varied depending on different type of solvent (chloroform, tetrahydrofuran (THF), toluene, xylene and 1,3-Dicholorobenzene) to dissolve MEH-PPPV at concentration of 20 mg/20ml. The solvent used to dissolve MEH-PPV has a dramatic effect on the polymer properties and characteristics due to different chain interaction, crystalline structure formation and surface morphology. The electrical properties of nanocomposited MEH-PPV: TiO 2 thin films were measured by solar simulator in dark and under AM 1.5, 100 mW/cm 2 white light illumination condition while the characterization of optical properties has been done using UV-VIS spectrophotometer to evaluate the absorbance as well as the transmittance. By comparing the nanocomposite thin films with the same weight MEH-PPV: TiO 2 , it was found the thin film which used 1,3-Dicholorobenze as a solvent has the highest conductivity around 338.64x10 3 S.m -1 . However for the optical properties, solvent of xylene gives the highest absorption coefficient at 8.4x10 6 m -1 . The dispersion of nanocomposited MEH-PPV:TiO 2 and film formation reproducibility, these solvents showed that its affected film resistance and dispersion stability in the thin films.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.364
    DOI: 10.4028/www.scientific.net/AMR.364.86
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2011
    detail.hit.zdb_id: 2265002-7
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  • 2
    Online Resource
    Online Resource
    Investigation on Annealed CNTs to the Electrical and Optical Properties of Nanocomposited MEH-PPV: CNTs Thin Film
    Trans Tech Publications, Ltd. ; 2011
    In:  Advanced Materials Research Vol. 364 ( 2011-10), p. 144-148
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 364 ( 2011-10), p. 144-148
    Abstract: Our research focused on the organic semiconductor layer of MEH-PPV blend CNTs to investigate the electrical and optical properties with different composition ratio of CNTs. The composition ratios are from 0, 1, 2, 3 and 4 wt%. The solvent used for dissolving the MEH-PPV is toluene which is an aromatic solvent. The CNTs are annealed before mixing it to the MEH-PPV solution at 450 ο C for 30 minutes. This is to ensure that all of the impurities in the CNTs are totally removed. After blending the CNTs with the MEH-PPV, the nanocomposite is then deposited on a glass substrate by spin coating technique. The optical properties of the thin film were characterized by using UV-VIS spectrometer to analyze the absorbance and transmittance of the thin film. The electrical properties characterization is done using two point probes to measure the current in dark and under illumination condition. The highest value of conductivity is at 4 wt% concentration of CNTs with 0.02738 Sm -1 . It can also be observed that the thicknesses of the thin films decreased from 0 wt% to 4 wt%. The highest value of absorbance is at 0 wt% with the value of 0.35. The absorbance peak tends to shift to a shorter wavelength with respect to the main absorbance (0 wt %) as reference sample. Transmittance of the thin film showed improvement from 40 to 70 T%.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.364
    DOI: 10.4028/www.scientific.net/AMR.364.144
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2011
    detail.hit.zdb_id: 2265002-7
    Location Call Number Limitation Availability
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    Online Resource
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