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Amine functionalized homoleptic ruthenium(II) sensitizer for dye‐sensitized solar cells: A combined effect of ancillary ligands and co‐sensitization
Author(s) -
Athanas Anish Babu,
Subramaniam Kamalesu,
Thangaraj Shankar,
Kalaiyar Swarnalatha
Publication year - 2019
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5044
Subject(s) - dye sensitized solar cell , homoleptic , ruthenium , photocurrent , photochemistry , energy conversion efficiency , materials science , amine gas treating , photovoltaic system , thiophene , chemistry , optoelectronics , electrolyte , organic chemistry , catalysis , electrode , metal , ecology , biology
Summary In this work, we propose a homoleptic ruthenium(II) complex, [Ru(dabpy) 3 ]Cl 2 (RDAB3) containing amine functionalized electron donating anchoring units for DSSCs. The DSSCs were co‐sensitized by coumarin‐based thiophene (CT) and indole (CI) units. The presence of four ancillary amine groups in RDAB3 influences its photovoltaic performance and the introduction of coumarin‐based co‐sensitizers significantly enhances the efficiency. The fabricated DSSCs were explored by UV‐Visible absorption, photocurrent‐voltage assessments, and impedance spectral studies. Co‐sensitized DSSCs showed an improved photovoltaic efficiency than the device sensitized by RDAB3 alone. Under optimized condition, the device made up of RDAB3+CI exhibited a high Jsc = 9.9 mA/cm 2 with Voc of 0.7 V, fill factor of 0.773, and solar to power conversion efficiency of 5.35% in standard global AM 1.5 solar irradiation. This performance is found to be higher than the DSSC sensitized with RDAB3 (η = 3.84%) fabricated under same circumstances.