Investigation of recovery mechanisms in dye sensitized solar cells

Chiappara, Clara; Figà, Viviana; Marco, G. Di; Calogero, Giuseppe; Citro, Ilaria; Scuto, Andrea; Lombardo, S.; Pignataro, Bruno; Principato, F.

doi:10.1016/j.solener.2016.01.010

Cited by 19 publications

(7 citation statements)

References 38 publications

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“…5. Thus, the high resistance to recombination effect corroborates the charge transport being more effective, 73 which contributes to the higher current density ( J SC ), as already pointed out for the ZnO/ZnS(ZC + TAA) cell compared to ZnS(ZC + TAA) as shown in Table 2. This evidences that better charge transfer is observed in the ZnO/ZnS(ZC + TAA) system.…”

Section: Resultssupporting

confidence: 70%

“…R rec is the resistance to recombination through the charge transfer in the film semiconductor/electrolyte interface. 71,73 CPE2 is related to the chemical capacitance of the photoelectrode representing the electron charge density as a function of the Fermi level. 74,75 CPE2 is not a pure capacitance due to the non-homogeneity of the ZnO/ZnS(ZC + TAA) semiconductor film and the effect of the double layer present at the interface between the electrolyte and the semiconductor film, which are corroborated by the index n (capacitive ideality index) which is 0.69 and 0.90 for cells (g) and (h), respectively.…”

Section: Resultsmentioning

confidence: 99%

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Low recombination rates and improving charge transfer as decisive conditions for high current densities and fill factors in ZnS complex systems

Fernandes

Ferrer

Raubach

et al. 2022

Phys. Chem. Chem. Phys.

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Section: Resultssupporting

confidence: 70%

Section: Resultsmentioning

confidence: 99%

Low recombination rates and improving charge transfer as decisive conditions for high current densities and fill factors in ZnS complex systems

Fernandes

Ferrer

Raubach

et al. 2022

Phys. Chem. Chem. Phys.

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“…Since Gratzel and co-workers [234], many researchers have used the self-assembly approach for the design of many new nanostructured dyes and new sensitization methods for the development of DSSCs [236][237][238][239][240]. These approaches employ a series of new self-assembly strategies that eliminate expensive synthesis steps and realize a high yield [241][242][243][244][245]. Environmentally friendly and non-toxic vegetable dyes such as carotenoids, betalains, anthocyanins and chlorophylls (extracted from fruits, leaves and flowers) have been recently proposed as eco-compatible sensitizers in DSSCs [246].…”

Section: Nature-inspired Nanomaterials: Self-assembly Of Nanostructurmentioning

confidence: 99%

Self-Assembly of Organic Nanomaterials and Biomaterials: The Bottom-Up Approach for Functional Nanostructures Formation and Advanced Applications

et al. 2020

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In this paper, we survey recent advances in the self-assembly processes of novel functional platforms for nanomaterials and biomaterials applications. We provide an organized overview, by analyzing the main factors that influence the formation of organic nanostructured systems, while putting into evidence the main challenges, limitations and emerging approaches in the various fields of nanotechology and biotechnology. We outline how the building blocks properties, the mutual and cooperative interactions, as well as the initial spatial configuration (and environment conditions) play a fundamental role in the construction of efficient nanostructured materials with desired functional properties. The insertion of functional endgroups (such as polymers, peptides or DNA) within the nanostructured units has enormously increased the complexity of morphologies and functions that can be designed in the fabrication of bio-inspired materials capable of mimicking biological activity. However, unwanted or uncontrollable effects originating from unexpected thermodynamic perturbations or complex cooperative interactions interfere at the molecular level with the designed assembly process. Correction and harmonization of unwanted processes is one of the major challenges of the next decades and requires a deeper knowledge and understanding of the key factors that drive the formation of nanomaterials. Self-assembly of nanomaterials still remains a central topic of current research located at the interface between material science and engineering, biotechnology and nanomedicine, and it will continue to stimulate the renewed interest of biologist, physicists and materials engineers by combining the principles of molecular self-assembly with the concept of supramolecular chemistry.

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“…A low-frequency semicircle was also used to assess the redox mediator diffusion in electrolytes. 98,99 In this examination, only one semicircle was noticed which can be due to the fact that this semicircle takes up space and prevents us from seeing the other two smaller semicircles. In addition, the semicircle's diameter is directly proportional to the working electrode's interface resistance.…”

Section: Photovoltaic Performance and Eis Analysis Of Dsscmentioning

confidence: 90%

The improved performance of dye‐sensitized solar cells using co‐sensitization and polymer gel electrolyte

Selvakumar

2022

Intl J of Energy Research

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To investigate the photovoltaic capabilities as a sensitizer and co-sensitizer for dye-sensitized solar cells (DSSCs), a new metal-free organic dye (CDIB) was synthesized. In addition, different concentrations of 1-n-hexyl-3-methylimidazolium iodide ionic liquid (IL) doped poly(vinylidene fluoride-hexafluoropropylene) gel polymer electrolytes are prepared and the high conductive electrolyte is used to fabricate the devices. The device having CDIB sensitizer and IL-15% electrolyte showed an efficiency of 1.86%. Further, the effect of CDIB co-sensitization on Z907 is examined. Consequently, the power conversion efficiency of DSSC with co-sensitized dye is raised by 23.29%, from 4.55 to 5.61%, when compared to DSSCs with individual dyes. This improvement is mostly due to an increase in a short-circuit current density and open-circuit voltage. Highlights• Co-sensitization is being used to enhance the performance of DSSCs.• Poly(vinylidene fluoride-hexafluoropropylene)-based gel polymer electrolytes doped with different amounts of 1-n-hexyl-3-methylimidazolium iodide were prepared for improving the conductivity of electrolyte.• A co-sensitized DSSC has an efficiency of 5.61%.• With co-sensitization, both V OC and J SC increased significantly.

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Investigation of recovery mechanisms in dye sensitized solar cells

Cited by 19 publications

References 38 publications

Low recombination rates and improving charge transfer as decisive conditions for high current densities and fill factors in ZnS complex systems

Low recombination rates and improving charge transfer as decisive conditions for high current densities and fill factors in ZnS complex systems

Self-Assembly of Organic Nanomaterials and Biomaterials: The Bottom-Up Approach for Functional Nanostructures Formation and Advanced Applications

The improved performance of dye‐sensitized solar cells using co‐sensitization and polymer gel electrolyte

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