Co-sensitization of ruthenium(II) dye-sensitized solar cells by coumarin based dyes

Athanas, Anish Babu; Shankar, Thangaraj; Swarnalatha, K.

doi:10.1016/j.cplett.2018.03.033

Cited by 19 publications

(4 citation statements)

References 32 publications

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“…Attachment of functional groups on the main structure of the organic dye influences a lot because of their electron donating or withdrawing tendency. Athanas et al [6] have observed that a diamino bypyridyl structured ruthenium complex dye produced about 7.09% efficiency when co-sensitized with a carbazole dye containing a thiophene moiety. In an another case, co-sensitization of metal-free 2,6-anthrazene carboxylic acid (Ant3) with a NIR dye SQ2 produced 10.42% efficiency (V oc = 0.72, J sc = 5.21 mA cm −2 , FF = 0.71) [150].…”

Section: Role Of Organic 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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Section: Role Of Organic 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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“…Keeping those specifics in mind, an efficient M-POP catalytic assembly can be constructed by combining suitable D and A building units, which would direct the highly efficient and selective CO 2 reduction process. Ru II -polypyridyl complexes are well explored in the area of photo redox catalysis. , The interesting photophysical and photochemical properties of the Ru II complex make them attractive materials for versatile applications such as dye-sensitized solar cells and photocatalysis. − M-POPs can be synthesized through either direct synthesis or postsynthetic metalation. Presynthetic metalation is a more rational approach, which offers better control over metal coordination sites, high metal loading, and the periodicity of metal ions within the polymer network.…”

Section: Introductionmentioning

confidence: 99%

Metallo-Porous Organic Polymer as a CO₂ Reduction Catalyst toward Selective Solar Fuel Production

Saravanan,

Karmakar,

Rahimi

et al. 2024

Chem. Mater.

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In photocatalytic CO 2 reduction for solar fuel production, selectivity and efficiency are crucial. Here, we report the design and synthesis of a donor−acceptor imine-based porous organic polymer (POP) Tpa-Phenda and a metallo-porous organic polymer (M-POP) Tpa-Phenda-Ru, by reacting tris(4-formylphenyl)amine (Tpa) and Phenda/[Ru(Phenda)-(bpy) 2 ] 2+ (Phenda = 4,4′-(1,10-phenanthroline-3,8-diyl)dianiline; bpy = 2,2′bipyridine) using acid-catalyzed Schiff base condensation reaction under solvothermal conditions. Here, the donor−acceptor dyads in both polymers harvested the visible light and transferred the photoexcited electrons to the active catalytic center, which is elucidated through in situ UV−vis spectroscopy. Both Tpa-Phenda and Tpa-Phenda-Ru produced CO in the acetonitrile−water medium using 1-benzyl-1,4-dihydronicotinamide (BNAH) and triethylamine (TEA) as sacrificial electron donors. Tpa-Phenda and Tpa-Phenda-Ru produced 0.92 and 9.77 mmol g −1 of CO, respectively. Tpa-Phenda-Ru exhibited a higher rate of CO formation and selectivity compared to bare Tpa-Phenda. This can be attributed to the presence of the coordinated Ru II center in Tpa-Phenda-Ru, which acts as a catalytic site. Interestingly, Tpa-Phenda showed a low exciton binding energy (78 meV), which enhances the charge transfer efficiency and minimizes the energy loss. From an in situ diffuse reflectance FTIR spectroscopy (DRIFTS) study together with DFT calculation, a possible catalytic cycle for CO formation was constructed.

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“…[6,7] Hence nontoxic, efficiently synthesized organic precursors has been engineered these days to produce several types of effective D-π-A, D-D-π-A, porphyrin, squaraine architecture [8] of dyes by tailoring different donor (D) and acceptor (A) moieties to the organic framework as a central stem. In this context, numerous publications are reported with various organic frameworks like xanthenes [9,10] coumarins, [11][12][13][14] squaraine, [15,16] anthracene, [17,18] bodipy, [19][20][21] etc. used in DSSC.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Physicochemical Properties of Provitamin K3 Derived Benzo[α]Phenoxazine as a Photosensitizer

Sahoo¹,

Chadar²,

Murmu³

et al. 2021

Eng. Sci.

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Three benzo []phenoxazine based photosensitizers known as 10-Chloro-6-methyl-5H benzo[α]phenoxazin-5-one (BPO-Cl), 6-methyl-5H-benzo[α]phenoxazin-5-one (BPO), and 6-methyl-5H-benzo[α]phenothiazin-5-one (BPT) synthesized from provitamin K3 were used as photosensitizers to fabricate a dye-sensitized solar cells (DSSC) device. The inbuilt intra-molecular charge transfer (ICT), favorable π-π interaction, planar shape, and compatible redox nature with appropriate frontier molecular orbitals (HOMO and LUMO) alignment are the significant physicochemical characteristics of benzo[α]phenoxazine moiety that rationalize to become an efficient photosensitizer. Thus, the bare benzo[]phenoxazine dyes without any efficient anchor and donor group are evaluated here with their intrinsic chemical behavior for efficient precursors in various energy transferring material. The intramolecular charge transfer occurring through aromatic rings bridged by two heteroatoms (O/S and N) is tunable with DFT analysis and single-crystal XRD data. The characteristic solar cell parameters show that chlorine substitution enhances the open-circuit voltage (Voc) from 0.53 V in BPO to 0.56 V in BPO-Cl. A noticeable enhancement in short-circuit current density (Jsc) nearly fivefold is observed for BPO dye compared to its thio-substituted BPT unit. The substitution of chlorine reduces the recombination rate in the device studied from electrochemical impedance spectroscopy. Thus BPO template is an excellent precursor to tailor various D/A groups to produce effective photosensitizer evaluated by physicochemical properties tunable with several optoelectrical, structural, morphological, and electrochemical analyses.

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Co-sensitization of ruthenium(II) dye-sensitized solar cells by coumarin based dyes

Cited by 19 publications

References 32 publications

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

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

Metallo-Porous Organic Polymer as a CO₂ Reduction Catalyst toward Selective Solar Fuel Production

Evaluation of Physicochemical Properties of Provitamin K3 Derived Benzo[α]Phenoxazine as a Photosensitizer

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Co-sensitization of ruthenium(II) dye-sensitized solar cells by coumarin based dyes

Cited by 19 publications

References 32 publications

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

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

Metallo-Porous Organic Polymer as a CO2 Reduction Catalyst toward Selective Solar Fuel Production

Evaluation of Physicochemical Properties of Provitamin K3 Derived Benzo[α]Phenoxazine as a Photosensitizer

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Metallo-Porous Organic Polymer as a CO₂ Reduction Catalyst toward Selective Solar Fuel Production