Advances in phenothiazine and phenoxazine-based electron donors for organic dye-sensitized solar cells

Alghamdi, Sameera A.; Alghamdi, Huda Ahmed; El‐Shishtawy, Reda M.; Asiri, Abdullah M.

doi:10.1016/j.dyepig.2021.109638

Cited by 54 publications

(23 citation statements)

References 204 publications

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“…A general framework based on a donor–acceptor system with π-spacers (D−π–A) induces intermolecular charge transfer (ICT) and determines the physicochemical properties of the device’s absorbing layer. − Therefore, designing an appropriate structure is significant for developing efficient and stable DSSCs. Heteroaromatic units such as triphenylamine, − carbazole, − phenoxazine, − phenothiazine, − and imidazole − are successfully used as electron-donating groups in D−π–A compounds. Especially interesting as donor blocks for dyes is the nonplanar phenothiazine conformation, which may inhibit molecular aggregation, lowering PV performance in DSSCs.…”

Section: Introductionmentioning

confidence: 99%

New D−π–D−π–A Systems Based on Phenothiazine Derivatives with Imidazole Structures for Photovoltaics

et al. 2022

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Two new compounds with an N-octyl phenothiazine core substituted at C(7) position via a triple bond with imidazole-containing butyl or dodecyl chains bearing on the opposite side at the C(7) cyanoacrylate moiety were synthesized. Photophysical and electrochemical studies were performed to evaluate the possibility of applying them in the dye-sensitized solar cells (DSSCs). The investigations were supported by density functional theory and time-dependent DFT. The synthesized dyes showed a similar absorption profile ranging from 250 to 600 nm in solvents and a high value of light-harvesting efficiency of about 0.8. It was found that its photoluminescence quantum yield was solvent-dependent, and the highest value (about 50%) was reached in DMF solution. Electrochemical measurements revealed that both compounds showed electron injection ability from the LUMO of the molecule to the TiO 2 conduction band and the possibility of regeneration by an electrolyte. DSSCs sensitized with the phenothiazine derivatives differing in TiO 2 thickness and the type of electrolyte (iodide and cobalt) were prepared. Additionally, transient absorption measurements in solution and solar cells were carried out to study excited-state properties and electron transfer dynamics. The influence of the hydrophobic hydrocarbon chain length of the imidazole unit in these dyes as well as TiO 2 thickness and the type of electrolyte on the device performance was observed. DSSCs sensitized with phenothiazine with dodecyl chains showed higher photocurrent, open-circuit voltage, and finally the power conversion efficiency, regardless of TiO 2 thickness.

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Section: Introductionmentioning

confidence: 99%

New D−π–D−π–A Systems Based on Phenothiazine Derivatives with Imidazole Structures for Photovoltaics

et al. 2022

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“…Conventionally, due to the reversible redox reaction and stable oxidized state, they have been used as a functional group in many organic semiconductors for hole‐transporting materials, [ 136–138 ] electrochromic materials, [ 139,140 ] electro‐/photoluminescence materials, [ 141–144 ] photocatalyst, [ 145–147 ] and redox mediators. [ 148–150 ] In addition, taking advantage of a high redox potential, they have been successfully utilized as a redox shuttle for high‐voltage LIBs. [ 151,152 ]…”

Section: Classification Based On Redox Centersmentioning

confidence: 99%

p‐Type Redox‐Active Organic Electrode Materials for Next‐Generation Rechargeable Batteries

Kye

Kang

Jang

et al. 2022

Adv Energy and Sustain Res

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Type redox-active organic materials (ROMs) draw increasing attention as a promising alternative to conventional inorganic electrode materials in secondary batteries due to high redox voltage, fast rate capability, environment friendliness, and abundance. First, fundamental properties of the p-type ROMs regarding the energy levels and the anion-related chemistry are briefly introduced. Then, the development progress of the p-type ROMs is outlined in this review by classifying them according to their redox centers. The molecular design strategies employed for improving their electrochemical performance are discussed to guide further research. Finally, a summary of the electrochemical performance achieved, regarding voltage, specific energy with power, and cycle stability, is provided with perspectives.

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“…It is widely employed for achieving thermally activated delayed fluorescence 20 and as room temperature phosphorescence materials, 21 as well as for organic dye-sensitized solar cells. 22 Although the CPL spectra of supramolecular assemblies and their corresponding solutions have been widely investigated, the CPL performance of dipeptides during the assembling process was little studied. 13,23 Herein, a pair of Phe-Phe dipeptides with the phenothiazine group, (L, L)-and (D, D)-P, was synthesized (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…It is widely employed for achieving thermally activated delayed fluorescence 20 and as room temperature phosphorescence materials, 21 as well as for organic dye-sensitized solar cells. 22…”

Section: Introductionmentioning

confidence: 99%

Molecular packing structural transition driven handedness inversion of circularly polarized luminescence of phenothiazine substituted Phe–Phe dipeptides

Lian

Liu

et al. 2023

New J. Chem.

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Advances in phenothiazine and phenoxazine-based electron donors for organic dye-sensitized solar cells

Cited by 54 publications

References 204 publications

New D−π–D−π–A Systems Based on Phenothiazine Derivatives with Imidazole Structures for Photovoltaics

New D−π–D−π–A Systems Based on Phenothiazine Derivatives with Imidazole Structures for Photovoltaics

p‐Type Redox‐Active Organic Electrode Materials for Next‐Generation Rechargeable Batteries

Molecular packing structural transition driven handedness inversion of circularly polarized luminescence of phenothiazine substituted Phe–Phe dipeptides

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