New di-anchoring A-π-D-π-A configured organic chromophores for DSSC application: sensitization and co-sensitization studies

Naik, Praveen; Su, Rui; El‐Shafei, Ahmed; Adhikari, Airody Vasudeva

doi:10.1039/c7pp00351j

Cited by 53 publications

(24 citation statements)

References 49 publications

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“…( A ) The “misc” category includes various dyes based on pyrazoline, naphthoquinone, N,N-dialkylaniline 105 , julolidine 106 , bithiazole 107 , cyclohexadiene 108 etc. ( B ) The “misc” category includes dyes with anchoring groups that include thiazolidine 73 , aldehyde, hydantoin 109 , isophorone 71 , phosphonic acid and pyrimidine 110 . Numbers on the right are the counts of cases found in each category.…”

Section: Resultsmentioning

confidence: 99%

“…The particularly large red shifts in the catechol group are attributable to their ability to strongly adsorb on to the TiO 2 surface 70 as well as the increased dipole moment of the surface-bound metal-ligand complex 26,27 . For some of the other groups such as isophorone 71 , malononitrile 72 , thiazolidine 73 and benzoic acid 74 , a majority of the cases are blue-shifted. The impact of multiple anchoring groups 75 was also studied (see Fig.…”

Section: Resultsmentioning

confidence: 99%

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Prediction of Absorption Spectrum Shifts in Dyes Adsorbed on Titania

Venkatraman

Yemene

Mello

2019

Sci Rep

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Dye adsorption on metal-oxide films often results in small to substantial absorption shifts relative to the solution phase, with undesirable consequences for the performance of dye-sensitized solar cells and optical sensors. While density functional theory is frequently used to model such behaviour, it is too time-consuming for rapid assessment. In this paper, we explore the use of supervised machine learning to predict whether dye adsorption on titania is likely to induce a change in its absorption characteristics. The physicochemical features of each dye were encoded as a numeric vector whose elements are the counts of molecular fragments and topological indices. Various classification models were subsequently trained to predict the type of absorption shift i.e. blue, red or unchanged (|Δλ| ≤ 10 nm). The models were able to predict the nature of the shift with a good likelihood (~80%) of success when applied to unseen data.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Prediction of Absorption Spectrum Shifts in Dyes Adsorbed on Titania

Venkatraman

Yemene

Mello

2019

Sci Rep

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“…These results are claiming that organic dyes are still have promising directions in the development of co-sensitization strategy. In contrast to these findings, Naik et al found that when the metal-free, un-symmetric A-π-ππ-A structured carbazole dyes with cyano acetic acid/2,4-thiazolidinedione/barbituric acid as efficient acceptor/anchoring units were co-sensitized with the NCSU-10, very low efficiency was observed compared with the individual performance of NCSU-10 [177]. This further emphasizing about the importance of designing potential anchoring units attached with the dye molecules.…”

Section: Role Of Organic Dyes In Co-sensitizationmentioning

confidence: 93%

“…Besides, aggregation also minimized by the sensitization of a long chain co-sensitizer in a suitable solvent [134]. Aggregation effect of dyes could also be minimized by the addition of additives like chenodeoxycholic acid (CDCA), cholic acid and octanoic acid through which improved performance is possible [15,47,150,163,[174][175][176][177]185]. In contrast of these findings, Gräf et al [65] found that the H and J aggregates bathochromically shift J bands (tilted orientation) and hypsochromically shift H bands (parallel orientation) of the aggregates of the squaraine dye with significant contribution to photocurrent.…”

Section: Role Of Phthalocyanine Dyes In Co-sensitizationmentioning

confidence: 99%

Role of co-sensitization in dye-sensitized and quantum dot-sensitized solar cells

et al. 2019

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Novel materials for third generation solar cells have emerged as one of the major scientific contribution in alternative energy approaches. In this scenario, semiconductor nanomaterials and organic dye molecules have greatly acknowledged for their vast contribution to the solar energy applications. Research on semiconductor nanomaterials for fabricating future generation solar cells is still fascinating due to their extraordinary structural and optical properties. Moreover, functionalization of organic dye molecules helps to harvest large amount of photons in order to apply them for high efficiency solar cell devices. Various attempts have been made to improve efficiency of quantum dot-sensitized solar cells and dye-sensitized solar cells using semiconductor inorganic nanomaterials and organic/organometallic dye molecules. Out of these, co-sensitization has been looking as most promising approach to improve the efficiency considerably. A record of over 14% of efficiency has been achieved in recent years through co-sensitization strategy. The energy transfer process during co-sensitization is also a very crucial and interesting. This review deals about materials, methods, various approaches and role of co-sensitization in enhancing the efficiency of dye-sensitized and quantum dot sensitized solar cells. The critical issues existing in the co-sensitization approach are also elaborately discussed.

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“…Encouraged by these results, several research groups, including ours, have demonstrated various organic push‐pull configured dyes derived from electron rich donors such as triphenylamine, indole, carbazole, phenothiazine, thiophene, etc. as effective co‐sensitizers for Ru‐II complex sensitized DSSCs . Among the various reported acceptor/anchoring moieties for sensitizers/co‐sensitizers, electron deficient cyanoacetic acid has been considered to be one of the attractive scaffolds, since it contains effective COOH functionality which would facilitate a strong binding on the TiO 2 surface .…”

Section: Introductionmentioning

confidence: 99%

An Efficient Aniline‐Based Co‐Sensitizer for High Performance N3‐Sensitized Solar Cells

et al. 2018

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In this work, we report a comprehensive photovoltaic investigation of a structurally simple Donor‐Acceptor (D−A) configured organic dye, N,N‐PABA as an active co‐sensitizer in DSSCs sensitized with well‐known Ru (II) based N3 dye. This effective co‐sensitizer (N,N‐PABA) comprises N,N‐dimethylaniline system as a donor scaffold linked with 4‐aminobenzoic acid as an electron withdrawing functionality. In the present study, we have demonstrated the profound effect of concentration of sensitizer, i. e. N3 based dye as well as co‐sensitizer, i. e. N,N‐PABA on the photovoltaic performance characteristics of solar cells. Interestingly, the best photovoltaic performance was obtained for the co‐sensitized device fabricated using 0.2 mM of N,N‐PABA along with 0.3 mM of N3 sensitizer, in presence of 20 mM of CDCA. It displayed power conversion efficiency (PCE) of 5.82% with JSC of 14.35 mA.cm−2, VOC of 0.626 V and FF of 64.85%. Here, the N,N‐PABA effectively filled the absorption valley, avoided the dye aggregation and reduced the charge recombination in the co‐sensitized devices. Thus, the results ameliorate the role of efficient co‐sensitizers to yield DSSC with improved performance by the selection of a matchable co‐sensitizer at an appropriate concentration.

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New di-anchoring A-π-D-π-A configured organic chromophores for DSSC application: sensitization and co-sensitization studies

Cited by 53 publications

References 49 publications

Prediction of Absorption Spectrum Shifts in Dyes Adsorbed on Titania

Prediction of Absorption Spectrum Shifts in Dyes Adsorbed on Titania

Role of co-sensitization in dye-sensitized and quantum dot-sensitized solar cells

An Efficient Aniline‐Based Co‐Sensitizer for High Performance N3‐Sensitized Solar Cells

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