Copper(ii) and cobalt(iii) Schiff base complexes with hydroxy anchors as sensitizers in dye-sensitized solar cells (DSSCs)

Chiteri Gautam, Devyani Srivastava, Gabriele Kociok-Köhn, Suresh W. Gosavi, Vinod K. Sharma, Ratna Chauhan, Dattatray J. Late, Abhinav Kumar, Mohd Muddassir

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9 Citations (SciVal)


Two Schiff base complexes of copper(ii) and cobalt(iii) having the formulae [CuL2] (Cu-Sal) and [CoL3] (Co-Sal) (HL = 2-(((2-hydroxyethyl)imino)methyl)phenol) have been synthesized and characterized microanalytically, spectroscopically and in the case of Cu-Sal using single crystal X-ray diffraction technique. The single crystal X-ray analysis reveals a square planar geometry around Cu(ii) satisfied by phenoxide oxygen and imine nitrogen of the L ligand to generate a six membered chelate ring. The solid state structure of Cu-Sal is satisfied by varied intermolecular non-covalent interactions. The nature of these interactions has been addressed with the aid of Hirshfeld surface analysis. Both compounds have been used as sensitizers in TiO2 based dye sensitized solar cells (DSSCs) and the DSSC experiments revealed that Co-Sal offers better photovoltaic performance in comparison to Cu-Sal. The Co-Sal exhibited a Jsc of 9.75 mA cm−2 with a Voc of −0.648 V, incident photon to current conversion efficiency (IPCE) of 57% and η of 3.84%. The relatively better photovoltaic performance of Co-Sal could be attributed to better light absorption and dye loading than that of Cu-Sal.

Original languageEnglish
Pages (from-to)9046-9054
Number of pages9
JournalRSC Advances
Issue number13
Early online date20 Mar 2023
Publication statusPublished - 31 Dec 2023

Bibliographical note

Funding Information:
Dr Mohd. Muddassir is grateful to Researchers Supporting Project Number (RSP2023R141), King Saud University, Riyadh, Saudi Arabia, for financial assistance.

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering


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