Designing and synthesis of imidazole based hole transporting material for solid state dye sensitized solar cells

Aulakh, Ramanpreet Kaur; Sandhu, Sana; Tanvi,; Kumar, Sandeep; Mahajan, Aman; Bedi, R. K.; Kumar, Subodh

doi:10.1016/j.synthmet.2015.03.030

Cited by 14 publications

(4 citation statements)

References 19 publications

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“…The optimization geometry (Figure 2) of the dyes was observed as the dihedral angle between two benzene rings of about 30, for compounds 13, 14, and 17, while this angle was evaluated to 35̊ for compounds 15 and 16 due to the steric effect between fluorine atom and the other benzene ring. These angles gave good solubility for all the dyes because they prevent aggregation due to π-stacks between the surfaces of molecules (31).…”

Section: Theoretical Calculationsmentioning

confidence: 99%

Investigating the Effects of Fluorine Substituents on Organic Dyes in Dye-Sensitized Solar Cells

ABDALHADİ,

MOHAMMED,

ALİ

et al. 2024

Journal of the Turkish Chemical Society Section A: Chemistry

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We synthesized and evaluated five organic dyes that featured both mono- and di-substituted fluorine atoms for application in dye-sensitized solar cells (DSSCs). The dye structure was designed with N, N-dimethylaniline as a donor, fluorophenyl as an π-conjugated bridge, and cyanoacetic acid as an anchoring and acceptor group. The fluorine substituents are strong electron-withdrawing groups, introducing different numbers and positions of fluorine atoms (ortho and meta) that were expected to the ability of the acceptor parts of the dye. The results showed that adding the fluorine mono-substitution in the ortho position can enhance the efficiency of the solar cells in comparison with the meta-substitution and unsubstituted one. However, the di-substitution by fluorine atoms in two ortho positions and ortho, meta positions reduced the performance of the solar cells. The reason was related to the effect of π-conjugation between the fluorine substituent and the carbonyl group of the carboxylic acid. The DSSCs based on dye 14 achieved the best results with power conversion efficiency (PCE) = 3.33%, (Jsc = 5.43 mA cm-2, Voc = 0.81V and FF = 75.85%) under standard conditions with I3-/I- as the electrolyte.

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Section: Theoretical Calculationsmentioning

confidence: 99%

Investigating the Effects of Fluorine Substituents on Organic Dyes in Dye-Sensitized Solar Cells

ABDALHADİ,

MOHAMMED,

ALİ

et al. 2024

Journal of the Turkish Chemical Society Section A: Chemistry

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“…In connection with the development of aforementioned HTMs, several reports have been already explored with many organic molecules that exhibit low molecular weight and generally consist of phenothiazine, phenoxazine, carbazole triphenylamine, conjugated polymers, and imidazole for application in both DSCs and PSCs. [8,9,[22][23][24][25][26][27][28][29] However, these HTMs were reported with low efficiency and best resulted when applied with lithium salts such as LiTFSI, 4-TBP, and N(PhBr) 3 SbCl 6 , [28] which kindly direct for better pore-filling property. Thus, it is necessary to design SOHTMs with the aforementioned unique property.…”

Section: Doi: 101002/solr202100206mentioning

confidence: 99%

‘V’ Shape A–D–A‐Type Designed Small Hole Conductors for Efficient Indoor and Outdoor Staging from Solid Dye‐Sensitized Solar Cells and Perovskite Solar Cells

et al. 2021

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With the exploration of new building blocks, a series of small organic hole transporting materials (SOHTMs) are designed and synthesized through simple microwave irradiation and systematically investigated in solid‐state dye‐sensitized solar cells (ss‐DSCs) and perovskite solar cells (PSCs). These V‐shaped SOHTMs having A–D–A architecture are endowed with low cost, better thermal stability, and good optical and electrochemical property, which respond to low indoor light and 1 sun illumination. The SOHTMs contain dibenzothiophene (DBT) and dibenzofuran (DBF) as core donors substituted with heteroaromatic molecules like naphthalene and indole, which are coded as SPH 1–SPH 4. ss‐DSCs and PSCs with SPH 4 (with LiTFSI) as SOHTMs exhibited a power conversion efficiency (PCE) amounting to 5.2% and 15.4%, respectively, under 1 sun illumination. Moreover, the applications of ss‐DSCs and PSCs in indoor environments are studied. Due to the good match with the indoor light emitting diode (LED) source, SPH 4 delivered PCEs of 26.3% (for ss‐DSCs) and 23.9 % (for PSCs) under 1800 lux illumination, which are very close to the PCE values obtained for standard hole transporting materials (HTMs) like spiro‐OMeTAD. Thus, these new SOHTMs provide the ultimate solution for the fabrication of photovoltaic devices, resulting in superior PCE under indoor light.

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“…Improved spectral coverage of the solar spectrum as well as enhanced light harvesting efficiencies are now achieved by exploiting various metal-free organic dyes [ 4 ], such as porphyrin [ 5 ] or arylamine derivatives [ 6 ]. More recently, and apart from perovskite solar cells [ 7 , 8 ], which are not the primary topic of this article, ssDSSC based on TiO 2 porous electrodes have received additional benefits from the intensive developments made on HTMs [ 9 , 10 , 11 ]. Consequently, efficiencies over 8% were demonstrated using p-type perovskite materials [ 12 , 13 ] or Copper phenanthroline complexes [ 14 ] such as HTM.…”

Section: Introductionmentioning

confidence: 99%

Influence of Nitrogen Doping on Device Operation for TiO2-Based Solid-State Dye-Sensitized Solar Cells: Photo-Physics from Materials to Devices

et al. 2016

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Solid-state dye-sensitized solar cells (ssDSSC) constitute a major approach to photovoltaic energy conversion with efficiencies over 8% reported thanks to the rational design of efficient porous metal oxide electrodes, organic chromophores, and hole transporters. Among the various strategies used to push the performance ahead, doping of the nanocrystalline titanium dioxide (TiO2) electrode is regularly proposed to extend the photo-activity of the materials into the visible range. However, although various beneficial effects for device performance have been observed in the literature, they remain strongly dependent on the method used for the production of the metal oxide, and the influence of nitrogen atoms on charge kinetics remains unclear. To shed light on this open question, we synthesized a set of N-doped TiO2 nanopowders with various nitrogen contents, and exploited them for the fabrication of ssDSSC. Particularly, we carefully analyzed the localization of the dopants using X-ray photo-electron spectroscopy (XPS) and monitored their influence on the photo-induced charge kinetics probed both at the material and device levels. We demonstrate a strong correlation between the kinetics of photo-induced charge carriers probed both at the level of the nanopowders and at the level of working solar cells, illustrating a direct transposition of the photo-physic properties from materials to devices.

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Designing and synthesis of imidazole based hole transporting material for solid state dye sensitized solar cells

Cited by 14 publications

References 19 publications

Investigating the Effects of Fluorine Substituents on Organic Dyes in Dye-Sensitized Solar Cells

Investigating the Effects of Fluorine Substituents on Organic Dyes in Dye-Sensitized Solar Cells

‘V’ Shape A–D–A‐Type Designed Small Hole Conductors for Efficient Indoor and Outdoor Staging from Solid Dye‐Sensitized Solar Cells and Perovskite Solar Cells

Influence of Nitrogen Doping on Device Operation for TiO2-Based Solid-State Dye-Sensitized Solar Cells: Photo-Physics from Materials to Devices

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