4.6 Article

Ferrocene Appended Asymmetric Sensitizers with Azine Spacers with phenolic/nitro anchors for Dye-Sensitized Solar Cells

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JOURNAL OF MOLECULAR STRUCTURE
卷 1249, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.molstruc.2021.131630

关键词

Azines; Ferrocene; DSSC; Electron injection; Density of states

资金

  1. King Saud University, Riyadh, Saudi Arabia [RSP-2021/141]
  2. Council of Scientific and Industrial Research (CSIR), New Delhi [01(2899)/17/EMR-II]

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Two extensively conjugated asymmetric ferrocene-appended compounds with azine spacers have been synthesized and characterized. These compounds were used as sensitizers in dye-sensitized solar cells, with one of them demonstrating better cell performance with higher J(SC), V-OC, and efficiency.
Two extensively conjugated asymmetric ferrocene appended compounds with azine spacers, and phenolic and nitro groups as terminal groups with the following formulas Fc-CH=N-N-CH-p-C6H4-OH (Fc-OH) and Fc-CH=N-N-CH-p-C6H4-NO2 (Fc-NO2) (Fc= ferrocene) have been synthesized and characterized using micro-analyses, FTIR, H-1 and C-13 NMR, UV-Vis and for Fc-NO2 single crystal X-ray diffraction. The structural studies reveal that Fc-NO2 possess an extensively conjugated system where C5H4 (Cp)-CH=N-N=CH-p-C6H4-NO2 is nearly planar which suggest strong electron communication from the ferrocene moiety to the p-C6H4-NO2 group via a -CH=N-N=CH- spacer. Both compounds have been used as sensitizers in titanium oxid based dye-sensitized solar cells (DSSCs) which indicate that amongst both sensitizers the Fc-OH one exhibited a better cell performance with J(SC) 12.91 mA cm(-2), V-OC 0.710 V, eta 5.88% and incident photon to a current conversion efficiency of 53%. Electron injection in the conduction band of the titanium oxide semiconductor have been authenticated with the help of density of states calculations. (C) 2021 Elsevier B.V. All rights reserved.

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