New heteroleptic 1,2-bis(diphenylphosphino)ethane appended cobalt(iii) ferrocene dithiocarbamates as sensitizers in dye-sensitized solar cells (DSSCs)

Devyani Srivastava, Amita Singh, Gabriele Kociok-Köhn, Suresh W. Gosavi, Ratna Chauhan, Muthupandian Ashokkumar, Abhinav Kumar, Mohd Muddassir

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3 Citations (SciVal)

Abstract

Three new heteroleptic 1,2-bis(diphenylphosphino)ethane (dppe) appended Co(iii) ferrocene dithiocarbamate complexes with the formula [Co(dppe)(Fcdtc)]PF6 ((Fcdtc = N-benzyl-N-methylferrocene dithiocarbamate (Co-FcBz), N-2-methylpyridyl-N-methylferrocene dithiocarbamate (Co-FcPy) and N-ethanol-N-methylferrocene dithiocarbamate (Co-FcEtOH); dppe = 1,2-bis(diphenylphosphino)ethane) have been synthesized and characterized by microanalyses, FTIR spectroscopy, electronic absorption spectroscopy and single crystal X-ray diffraction. Single crystal X-ray diffraction revealed that the geometry around Co(iii) in the Co-FcBz and Co-FcEtOH complex cations is distorted octahedral and satisfied by four sulfur atoms of two dithiocarbamate ligands and two phosphorus atoms of the dppe ligand. The weak interactions existing in Co-FcBz and Co-FcEtOH have been addressed with the help of Hirshfeld surface analysis. The electronic absorption spectra of all three compounds display bands in the regions of ∼400-500 nm and ∼500-750 nm which are due to the d-d transition of ferrocene and Co(iii), respectively. These compounds have been used as photo-sensitizers in dye-sensitized solar cells (DSSCs). Experiments revealed that amongst all three sensitizer-based DSSC set-ups, the assembly fabricated using Co-FcEtOH exhibited the best photovoltaic performance with 3.89% efficiency (η), a short circuit current (Jsc) of 9.15 mA cm−2, an open circuit voltage (Voc) of −0.680 V and an incident photon-to-current conversion efficiency of 49%. Also, the ageing experiment for the DSSC set-up fabricated using Co-FcEtOH revealed that after 100 h, the set-up retained 97% of its efficiency, which indicates that such a class of molecular systems can be used as apt sensitizers for DSSC fabrication.

Original languageEnglish
Pages (from-to)6420-6432
Number of pages13
JournalNew Journal of Chemistry
Volume47
Issue number13
Early online date1 Mar 2023
DOIs
Publication statusPublished - 7 Apr 2023

Bibliographical note

Funding Information:
Dr. Mohd. Muddassir is grateful to the Researchers Supporting Project Number (RSP2023R141), King Saud University, Riyadh, Saudi Arabia, for financial assistance. AK is grateful to the Research and Development, Department of Higher Education, UP Government for sanctioning project number 108/2021/2585/sattar-4-2021-4(28)/2021.

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Materials Chemistry

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