2023
DOI: 10.1021/acs.jpcc.3c05222
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Steric and Electronic Effect in Unsymmetrical Squaraine Dyes for Dye-Sensitized Solar Cells

Indrajeet S. Nawghare,
Ambarish Kumar Singh,
Ashakiran Maibam
et al.

Abstract: Functionalizing the light harvesting sensitizers with additional electron-donating or -withdrawing groups is a potential approach to modulate the photophysical and electrochemical properties which in-turn optimizes the driving force associated with the charge injection and dye-regeneration processes at the dye-TiO 2 / electrolyte interface and the photovoltaic device performance in dyesensitized solar cells (DSSCs). Furthermore, modulated electronic levels of the dyes provide an opportunity to reduce the overp… Show more

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Cited by 3 publications
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“…Thus, we propose to these molecules as promise natural dye and thus a computational study about photoexcitation and electron injection will be fundamental to understand the role of carotenoids as sensitizing on TiO 2 . [42,43]…”
Section: Introductionmentioning
confidence: 99%
“…Thus, we propose to these molecules as promise natural dye and thus a computational study about photoexcitation and electron injection will be fundamental to understand the role of carotenoids as sensitizing on TiO 2 . [42,43]…”
Section: Introductionmentioning
confidence: 99%
“…However, to control the aggregation of dyes by anchoring group engineering, a set of selenorhodamine dyes have been developed, and they showed that the H-aggregated dyes can participate in photocurrent generation . Furthermore, including alkyl groups and electron-donating groups in squaraine dye structures helps minimize the aggregation of sensitizers on TiO 2 and modulates the electronic properties of the dyes for enhanced device performance. , We designed and synthesized two novel pyridine-based dyes SD1 and SD2 and a carboxylic acid-based visible-light-active dye SD3 , in which pyridine binds mostly to the Lewis acid sites of TiO 2 while the carboxylic acid binds to the Brønsted acid sites of TiO 2 . SD1 and SD2 dyes having pyridyl anchoring groups were used to study their cosensitization using a blue dye, that is SD4 , having a carboxylic acid anchoring group (Figure ).…”
Section: Introductionmentioning
confidence: 99%
“…Dyes SD1 or SD2 were cosensitized with SD4 as the absorption spectra complemented each other ( SD1 and SD2 absorb in the visible region, whereas SD4 absorbs in the far-red region) (Figure ). The dye SD4 possesses indoline donor groups with long alkyl chains, which have been proven to be useful in iodine-based electrolyte systems, particularly in reducing the charge recombination process in a DSSC device …”
Section: Introductionmentioning
confidence: 99%