2013
DOI: 10.1021/sc400183t
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Relating Electron Donor and Carboxylic Acid Anchoring Substitution Effects in Azo Dyes to Dye-Sensitized Solar Cell Performance

Abstract: The relationship between the molecular structures of a series of azo dyes and their operational performance when applied to dye-sensitized solar cells (DSSCs) is probed via experimental and computational analysis. Seven azo dyes, with three different donating groups (dimethylamino, diethylamino, and dipropylamino) and carboxylic acid anchoring positions (ortho-, meta-, and para-substituted phenyl rings) are studied. Single-crystal X-ray diffraction is employed in order to analyze the effects of conformation an… Show more

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Cited by 89 publications
(88 citation statements)
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“…Extracted natural dye, however, has low yields of extract and scarce resources [10]. Organic dye such as azobenzene has outstanding chromophores with strong absorption in visible region and intrinsic advantages of good photo and thermal stability [11,12]. Azobenzene is a reactive precursor for functional group conversion and attachment such as vinyl and alkoxy chain with enhanced optical properties [13,14].…”
Section: Introductionmentioning
confidence: 99%
“…Extracted natural dye, however, has low yields of extract and scarce resources [10]. Organic dye such as azobenzene has outstanding chromophores with strong absorption in visible region and intrinsic advantages of good photo and thermal stability [11,12]. Azobenzene is a reactive precursor for functional group conversion and attachment such as vinyl and alkoxy chain with enhanced optical properties [13,14].…”
Section: Introductionmentioning
confidence: 99%
“…η = 0.29-0.32%. 24 These photovoltaic test results are corroborated by a visual inspection of the DSSC working electrodes involving 1-3 after dye sensitization (see Figure S3 of the Electronic Supplementary Information). This confirms that the -NO 2 anchoring group offers a viable binding site for the dye on the TiO 2 surface, as judged by the color difference before and after the sensitization process.…”
Section: Dye-sensitized Solar Cell Operational Performancementioning
confidence: 57%
“…60 In each case, the main peak in 1-3 is red-shifted by ca. 50-100 nm compared to the analogous case where -COOH rather than -NO 2 is the substituent (464 nm) 24 . This is presumably because the nitro group has a better electron withdrawing ability than the -COOH group, as judged by the corresponding Hammett values.…”
Section: Uv/vis Absorption Spectramentioning
confidence: 93%
See 1 more Smart Citation
“…Azo dyes are a well known family of organic dyes including the azo group (-N N-) bonded to aromatic ring systems (Zhang et al, 2013). There are several compounds reported containing even more than one azo chromophore per molecule, also linked to heterocyclic systems (Patni & Patni, 2016).…”
Section: Structure Descriptionmentioning
confidence: 99%