Affiliation:
1. Centre for Sustainable Energy Technologies (C‐SET) CSIR‐National Institute for Interdisciplinary Science and Technology (CSIR‐NIIST) Thiruvananthapuram India
2. Academy of Scientific and Innovative Research (AcSIR) Ghaziabad India
3. Chemical Sciences and Technology Division CSIR‐National Institute for Interdisciplinary Science and Technology (CSIR‐NIIST) Thiruvananthapuram India
4. Department of Chemistry National Institute of Technology Srinagar Uttarakhand India
Abstract
AbstractTwo novel cyclometalated ruthenium complexes, RC‐4 and RC‐5, featuring 1‐phenylisoquinoline and phenyl quinazoline as ancillary ligands, respectively, were synthesized to investigate their viability with the environmentally friendly copper (Cu) redox mediator, [Cu(bpye)2]2+/+. The modification of the ligand environment resulted in variations in the energetics, photophysical properties, and photovoltaic performance of RC‐4 and RC‐5 sensitizers. Despite RC‐5 sensitizer possessing a more positive ground state potential of 1.19 V versus the NHE, the RC‐4 sensitizer, with a lower HOMO level of 0.72 V versus NHE, exhibited superior photovoltaic performance along with the Cu electrolyte, attributed to its enhanced light harvesting ability, improved lifetime and reduced back electron transfer, contributing to higher Jsc, Voc, and PCE.
Funder
Council of Scientific and Industrial Research, India
Science and Engineering Research Board