Probing Interfacial Halogen-Bonding Effects with Halogenated Organic Dyes and a Lewis Base-Decorated Transition Metal-Based Redox Shuttle at a Metal Oxide Interface in Dye-Sensitized Solar CellsClick to copy article linkArticle link copied!
- Christine CuriacChristine CuriacDepartment of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United StatesMore by Christine Curiac
- Leigh Anna HuntLeigh Anna HuntDepartment of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United StatesMore by Leigh Anna Hunt
- Md Abdus SabujMd Abdus SabujDave C. Swalm School of Chemical Engineering and Center for Advanced Vehicular Systems, Mississippi State University, Mississippi State, Mississippi 39762, United StatesMore by Md Abdus Sabuj
- Qing LiQing LiDepartment of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United StatesMore by Qing Li
- Alexandra BaumannAlexandra BaumannDepartment of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United StatesMore by Alexandra Baumann
- Hammad CheemaHammad CheemaDepartment of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United StatesMore by Hammad Cheema
- Yanbing ZhangYanbing ZhangDepartment of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United StatesMore by Yanbing Zhang
- Neeraj Rai*Neeraj Rai*Email: [email protected]Dave C. Swalm School of Chemical Engineering and Center for Advanced Vehicular Systems, Mississippi State University, Mississippi State, Mississippi 39762, United StatesMore by Neeraj Rai
- Nathan I. Hammer*Nathan I. Hammer*Email: [email protected]Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United StatesMore by Nathan I. Hammer
- Jared H. Delcamp*Jared H. Delcamp*Email: [email protected]Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United StatesMore by Jared H. Delcamp
Abstract

Metal-free bis-cyclopentadithiophene-based molecular sensitizers with varying halogens (Cl, Br, and I) installed at a terminal position in conjugation with the dye frontier molecular orbital π-system are studied in combination with two cobalt redox shuttles (RSs): with and without a nonmetal-coordinated nitrogen atom (pyrazine or pyridine) accessible to the halide-decorated dyes. This systematic study employs UV–vis absorption, cyclic voltammetry, density functional theory calculations, and nanosecond transient absorption spectroscopy to probe the influence of possible halogen-bonding between the dyes and the pyrazine-based RS on electron-transfer reactions and effects on dye-sensitized solar cell performances. The results of this study imply a possible halogen-bonding event occurring between the halogenated dyes and the halogen binding RS with substantial effects on electron-transfer reaction rates.
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