Enhancing the temporal stability of DSSCs with novel vinylpyrimidine anchoring and accepting group

“…The dye AT-Pyri was the result of the condensation reaction between the aldehyde AT-CHO [22] and 4-methylpyrimidine with Aliquat 336 as a phase-transfer catalyst in the alkaline medium [12]. The detailed synthetic procedures (Scheme S1) and spectroscopic data ( 1 H, 13 C-NMR spectra, and mass spectrum, Supplementary Materials Figures S1-S5), as well as the corresponding parameters obtained from UV-vis and electrochemical characterization, have already been reported [12].…”

Section: Synthesis and Structural Characterization Of The Sensitizer Dyementioning

confidence: 99%

“…The TiO 2 photoanodes (7 µm thick) were sensitized with AT-Pyri dye [12] at room temperature by dipping in 0.1 mM dichloromethane dye solution for 72 h. The sensitized electrodes were rinsed with dichloromethane and dried with air.…”

Section: Dssc Device Fabricationmentioning

confidence: 99%

“…Notably, DSSCs prepared with GO, GA-45 min or GA-18 h as counter electrodes demonstrated exceptional stability over the course of nearly 1200 h after cell assembly. Previous studies [12] have An analogous device was prepared using a Pt counter electrode with the aim of comparing its behavior with these carbonaceous materials. The J/V plots showed the S-shape plots for devices prepared with carbonaceous materials; however, a rectangular response was obtained for the device prepared with platinum as a counter electrode, which may indicate contact problems of carbonaceous materials in these devices [31].…”

Section: Dsscs Performancementioning

confidence: 99%

“…Thus, extensive studies have been conducted to optimize the design of D, π-spacer, and A [7][8][9] components. Regarding donors, N,N'-dialkylanilines are interesting due to their intense light absorption, with a red-shifted intramolecular charge transfer band compared to triphenylamines derivatives [10]; π-spacers containing heterocycles, such as thiophenes, are shown to stabilize the sensitizers [11]; and finally, groups such as pyrimidine, with electron withdrawing properties but also acting as an anchoring group, have recently been explored [12].…”

Section: Introductionmentioning

confidence: 99%

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Metal-Free Counter Electrodes for DSSCs Based on Nitrogen-Doped Reduced Graphene Oxide Materials

et al. 2023

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The importance of counter electrodes in Dye Sensitized Solar Cells (DSSCs) cannot be neglected as they enable the transfer of electrons across the outer circuit, thereby facilitating the reduction reaction of the I3−/I− redox electrolyte. However, the dissolution and deposition of the usual platinum layer on the counter electrode has resulted in contamination concerns. To address this issue, metal-free counter electrodes made of reduced graphene oxide (rGO) aerogels were developed and their catalytic performance towards I3− reduction was evaluated. The reduced graphene materials were characterized, and the fitting analysis of XPS revealed the presence of various nitrogen species, with the primary peaks attributed to pyridinic and pyrrolic nitrogen. The hydrothermal treatment of graphene oxide (GO) resulted in a higher graphitic character and the intensification of the contacts between graphene nanosheets, which should entail higher electrical conductivity, both in-plane and between rGO sheets. Additionally, the presence of nitrogen-provided active sites promoted the catalytic reduction of the electrolyte. Encouragingly, good charge transfer rates were observed between the counter electrode and the electrolyte in the assembled DSSCs, resulting in good photocurrents and exceptional stability over the course of nearly 1200 h after cell assembly. The results obtained suggest that these GO-based systems are promising candidates for developing metal-free counter electrodes for DSSC, supporting the interest of further study.

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Structure-based screening of sp2 hybridized small donor bridges as donor: acceptor switches for optical and photovoltaic applications: DFT way

Hassan,

Sumrra

2024

J Mol Model

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Enhancing the temporal stability of DSSCs with novel vinylpyrimidine anchoring and accepting group

Cited by 15 publications

References 41 publications

The arylvinylpyrimidine scaffold: a tunable platform for luminescent and optical materials

The arylvinylpyrimidine scaffold: a tunable platform for luminescent and optical materials

Metal-Free Counter Electrodes for DSSCs Based on Nitrogen-Doped Reduced Graphene Oxide Materials

Structure-based screening of sp2 hybridized small donor bridges as donor: acceptor switches for optical and photovoltaic applications: DFT way

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