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    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/17453


    Title: Performance Variation from Triphenylamine- to Carbazole- Triphenylamine-Rhodaniline-3-Acetic Acid Dyes in Dye-Sensitized Solar Cells
    Authors: 林文崇
    Keywords: Dye-sensitized solar cells (DSSCs);Carbazole-triphenylamine (CTPA)-based organic dyes;Knoevenagel condensation reaction;Electrochemical impedance
    Date: 2011-10
    Issue Date: 2012-09-10 15:15:13 (UTC+8)
    Abstract: Organic dyes have been synthesized which contain an extra-electron donor (carbazole) and electron acceptors (rhodaniline-3-acetic acid) on triphenylamines (TPA). Photophysical, electrochemical, and theoretical computational methods have categorized these compounds. Nanocrystalline TiO2-based dyesensitized solar cells (DSSCs) are fabricated using these dye molecules as light-harvesting sensitizers. The overall efficiency of sensitized cells has 4.64% relative to a cis-di(thiocyanato)-bis(2,2-bipyridyl)- 4,4-dicarboxylate ruthenium (II) (N3 dye)-sensitized device (7.83%) fabricated and measured under the same conditions. Carbazole-electron donation in the dye molecules plays a key role in the increased efficiency. Two rhodaniline-3-acetic acid groups appear to help convey the charge transfer from the excited dye molecules to the conduction band of TiO2, leading to a higher efficiency of devices using such a dye. Electrochemical impedance supports this dye’s effect on enhancing charge transfer in TiO2 (e−). Computations on this dye compound also indicate the larger charge transfer efficiency in the electronically excited state.
    Relation: Materials Chemistry and Physic, 130(1-2), 635-643
    Appears in Collections:[環境工程系所] 期刊論文

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