Can aliphatic anchoring groups be utilised with dyes for p-type dye sensitized solar cells?

Hao, Yan; Wood, Christopher J.; Clark, Charlotte A.; Calladine, James A.; Horvath, Raphael; Hanson‐Heine, Magnus W. D.; Sun, Xue-Zhong; Clark, Ian P.; Towrie, Michael; George, Michael W.; Yang, Xichuan; Sun, Licheng; Gibson, Elizabeth A.

doi:10.1039/c6dt00146g

Cited by 26 publications

(14 citation statements)

References 49 publications

(95 reference statements)

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“…Once adsorbed onto NiO such a signal totally disappears. This experimental evidence unambiguously indicates that the bond between the NiO surface and KuQs occurs through the carboxylic anchoring group 53,64 (Fig. 9), thus confirming the bidentate bridging structure reported in Fig.…”

Section: Nio Characterizationsupporting

confidence: 84%

“…51 This result provided a new strategy for dye-design: in fact, inspired by such an approach Hao et al synthesized a new class of D-p-A dyes (Z = 3.7%) 52 and quite recently, they reported the employment of similar dyes as sensitizers for NiO-based p-type DSSCs. 53 Herein, we report for the first time the adoption of a novel class of organic dyes, called KuQuinones (KuQs), 54 as sensitizers for p-type DSSCs. These compounds are able to harvest light in the visible region of the spectrum, due to their pentacyclic and totally conjugated structure, which makes them suitable dyes in solar-energy conversion devices.…”

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confidence: 99%

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KuQuinones as sensitizers for NiO based p-type dye-sensitized solar cells

et al. 2017

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A new series of KuQuinones (KuQs) have been synthesized and employed as dye-sensitizers for NiO-based p-type dye-sensitized solar cells (p-DSSCs). KuQs are pentacyclic quinoid compounds which are characterized by a fully conjugated structure that is responsible for the strong and broad absorption in the visible spectrum. The HOMO/LUMO states of KuQs considered here have matching energy levels with the upper edge of the NiO valence band and I−/I3− redox potential energy. These features render such compounds suitable for NiO sensitization in p-DSSCs. The new carboxylic acid-substituted KuQ derivatives proposed here differ in the length of the alkyl chain. The JV characteristic curves and the external quantum efficiency spectra have been recorded. The results showed that the performances of KuQ-sensitized cells were similar to that of the benchmark sensitizer erythrosine B (Ery B), despite the lack of electronic conjugation between the anchoring group and the light absorbing unit. This result led us to hypothesize that the photoinduced charge transfer between the excited KuQ dyes and the NiO electrode occurred through space and not via chemical bonds as it usually occurs in these systems. The mechanism of charge transfer through space has been supported by data from IR spectroscopy

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Section: Nio Characterizationsupporting

confidence: 84%

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confidence: 99%

KuQuinones as sensitizers for NiO based p-type dye-sensitized solar cells

et al. 2017

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“…7,12,[17][18][19] The suboptimal photocathode performance could originate from many factors, including the NiO electrode, which exhibits slow hole mobility and large losses in efficiency due to charge recombination between holes in the NiO and reduced dye or catalyst molecules. [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] These issues make developing an efficient photocathode quite difficult. Thus, is it crucial that fundamental studies are performed to gain understanding of the processes occurring in photocathodes if performance is to be rationally improved.…”

Section: Introductionmentioning

confidence: 99%

Using Surface Amide Couplings to Assemble Photocathodes for Solar Fuel Production Applications

Materna

Lalaoui

Laureanti

et al. 2019

ACS Appl. Mater. Interfaces

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A facile surface-amide coupling method was examined to attach dye and catalyst molecules to silatrane-decorated NiO electrodes. Using this method, electrodes with a push-pull dye were assembled, and characterized by photoelectrochemistry and transient absorption spectroscopy. The dye-sensitized electrodes exhibited hole injection into NiO and good photoelectrochemical stability in water, highlighting the stability of the silatrane anchoring group and the amide linkage. The amide coupling protocol was further applied to electrodes that contain additional proton reduction nickel catalysts for use in photocathode architectures. Evidence for catalyst reduction was observed during photoelectrochemical measurements and via fs-transient absorption spectroscopy demonstrating the possibility for application in photocathodes.

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“…Bindingmode of the anchoringgroup on NiO studied by infrared spectroscopy Characterization of the dye binding modes on the NiO surface was carriedo ut by FTIR spectroscopy,a s there is extensive information availableo nt he position of vibrational transitions of these anchoring groups on TiO 2 [12,13] butf ewer on NiO. [18,20,36,37] To interprett he data, we have compared the FTIR spectra of the bare NiO with those of the dye in KBr pressed disc andt he dye grafted on NiO in ordert od etermine the band shifts and disappearances (Figures S1-S5). Figure 7s ummarizes the binding mode of each dye deduced from the analysis of the FTIR spectra.…”

Section: Dyesmentioning

confidence: 99%

A Comparative Investigation of the Role of the Anchoring Group on Perylene Monoimide Dyes in NiO‐Based Dye‐Sensitized Solar Cells

et al. 2020

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The anchoring group of a sensitizer may strongly affect the overall properties and stability of the resulting dye‐sensitized solar cells (DSSCs) and dye‐sensitized photoelectrosynthetic solar cells (DSPECs). The properties of seven perylene monoimide (PMI) dyes have been comprehensively studied for their immobilization on nanocrystalline NiO film. The PMI dyes differ only by the nature of the anchoring group, which are: carboxylic acid (PMI‐CO2H), phosphonic acid (PMI‐PO3H2), acetyl acetone (PMI‐acac), pyridine (PMI‐Py), aniline (PMI‐NH2), hydroxyquinoline (PMI‐HQ), and dipicolinic acid (PMI‐DPA). The dyes are investigated by cyclic voltammetry and spectroelectrochemistry and modeled by TD‐DFT quantum chemical calculations. The mode of binding of these anchoring groups is investigated by infrared spectroscopy and the stability of the binding to NiO surface is studied by desorption experiments in acidic and basic media. The phosphonic acid group is found to offer the strongest binding to the NiO surface in terms of stability and dye loading. Finally, a photophysical study by ultrafast transient absorption spectroscopy shows that all dyes inject a hole in NiO with rate constants on a subpicosecond timescale and display similar charge recombination kinetics. The photovoltaic properties of the dyes show that PMI‐HQ and PMI‐acac give the highest photovoltaic performances, owing to a lower degree of aggregation on the surface.

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Can aliphatic anchoring groups be utilised with dyes for p-type dye sensitized solar cells?

Cited by 26 publications

References 49 publications

KuQuinones as sensitizers for NiO based p-type dye-sensitized solar cells

KuQuinones as sensitizers for NiO based p-type dye-sensitized solar cells

Using Surface Amide Couplings to Assemble Photocathodes for Solar Fuel Production Applications

A Comparative Investigation of the Role of the Anchoring Group on Perylene Monoimide Dyes in NiO‐Based Dye‐Sensitized Solar Cells

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