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- W2122449972 abstract "The elongation of π-conjugated bridges between the donor (D) and the acceptor (A) represents a feasible strategy towards enhancement of light-harvesting in both breadth and depth of organic D-π-A dyes suitable for nanocrystalline TiO2-based dye-sensitized solar cells (DSSCs). Here, a series of organic dyes with elongating conjugated bridges is synthesized and characterized. DSSC devices employing a cobalt (II/III) redox electrolyte are fabricated using these dyes as light-harvesting sensitizers. Compared to a dye with the 3,4-ethylenedioxythiophene (EDOT) linker (G188), the three counterparts with further extended π-bridges present gradually red-shifted electronic absorption spectra and a persistent decrease in oxidation potential. The photocurrent action spectra show that the extension of π-conjugated bridges decreases the open-circuit photovoltage. The best performance is shown in G268 with a short-circuit photocurrent density (Jsc) of 16.27 mA cm2, an open-circuit photovoltage (Voc) of 0.83 V, and a fill factor (FF) of 0.67, corresponding to an overall conversion efficiency of 9.24%. Unexpectedly, G270, which has with the longest π-bridge, showed the lowest Jsc, Voc, and efficiency." @default.
- W2122449972 created "2016-06-24" @default.
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- W2122449972 date "2013-11-27" @default.
- W2122449972 modified "2023-10-13" @default.
- W2122449972 title "Extended π-Bridge in Organic Dye-Sensitized Solar Cells: the Longer, the Better?" @default.
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- W2122449972 doi "https://doi.org/10.1002/aenm.201301485" @default.
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