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• W2472749921 endingPage "16353" @default.
• W2472749921 startingPage "16340" @default.
• W2472749921 abstract "The three squaraines (SQs) here indicated as VG1-C8, VG10-C8, and VG11-C8 (Figure 1) have been synthesized and employed as dye sensitizers of p-type dye-sensitized solar cells (p-DSCs) when screen-printed NiO is the nanoporous photocathode. The photoelectrochemical performance of the three differently sensitized p-DSCs is compared in terms of the structural diversities among the three SQs. The p-DSC with VG11-C8 as sensitizer, i.e., the sole SQ with a dicyano–vinyl substituent on the central squaric ring, results in the most efficient device because of the highest values of overall conversion efficiency (η > 0.04% for VG11 vs η < 0.02% for VG1 and VG10). Moreover, VG11 is the sole SQ of the C8 series which exerts a favorable synergistic effect on the external quantum efficiency (EQE) of screen-printed NiO. The antiaggregating agent CDCA (= chenodeoxycholic acid) in the sensitizing solution of NiO is beneficial on the performance of the corresponding p-DSCs when the ratio [CDCA]/[dye] is 1:10 for all three SQs. Electrochemical impedance spectroscopy (EIS) of the SQs-sensitized p-DSCs under illumination reveals that the best performing photoelectrochemical cell, i.e., the one with VG11 sensitizer, is characterized by relatively lower resistances of charge transport (∼30 Ω) and interfacial recombination (∼90 Ω), shorter hole diffusion times (∼2 ms), and a larger hole diffusion coefficient (∼2 × 10–7 cm2 s–1) with respect to the p-DSCs with VG1 and VG10 dyes." @default.
• W2472749921 created "2016-07-22" @default.
• W2472749921 creator A5004115553 @default.
• W2472749921 creator A5007730137 @default.
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• W2472749921 creator A5033141563 @default.
• W2472749921 creator A5080664055 @default.
• W2472749921 date "2016-07-21" @default.
• W2472749921 modified "2023-09-27" @default.
• W2472749921 title "Beneficial Effect of Electron-Withdrawing Groups on the Sensitizing Action of Squaraines for <i>p</i>-Type Dye-Sensitized Solar Cells" @default.
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• W2472749921 doi "https://doi.org/10.1021/acs.jpcc.6b03965" @default.
• W2472749921 hasPublicationYear "2016" @default.

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