Abstract
The effect of di-anchoring group was studied using 9,9-dioctyl-9H-fluorene as bridge which was formed by coupling two triphenylamine-based dyes. Two octyl chains were introduced into the core of di-anchoring dye to avoid its aggregation and minimize its TiO2/electrolyte recombination reactions. The photophysical, electrochemical and photovoltaic parameters of both mono- and di-anchoring sensitizers were compared, herein referred to as KS-18 and KS-20, respectively. Computational results indicated that the two anchoring groups adsorbed to the TiO2 in KS-20 were thermodynamically stable as compared to only one anchoring group. The results show that KS-20 produced a 7% increase in its photovoltaic conversion efficiency mainly due to an increase in the short-circuit current density. This increase was brought by the red-shifting and widening of its absorption spectra thereby increasing its light harvesting efficiency.
Original language | English |
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Article number | 110020 |
Journal | Dyes and Pigments |
Volume | 198 |
DOIs | |
Publication status | Published - Feb 2022 |
Keywords
- Coupling
- Density functional theory
- Fluorene
- Self-consistent charge density functional tight binding
- Triphenylamine
ASJC Scopus subject areas
- General Chemical Engineering
- Process Chemistry and Technology