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Non‐Covalent Postfunctionalization of Dye Layers on TiO 2 — A Tool for Enhancing Injection in Dye‐Sensitized Solar Cells
Author(s) -
Luchs Tobias,
Zieleniewska Anna,
Kunzmann Andreas,
Schol Peter R.,
Guldi Dirk M.,
Hirsch Andreas
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202004928
Subject(s) - covalent bond , porphyrin , bodipy , dye sensitized solar cell , materials science , layer (electronics) , cyanuric acid , surface modification , nanotechnology , photochemistry , nanoparticle , chemical engineering , chemistry , combinatorial chemistry , organic chemistry , fluorescence , melamine , optics , electrode , electrolyte , physics , engineering
We report on newly tailored dye layers, which were employed, on one hand, for covalent deposition and, on the other hand, for non‐covalently post‐functionalizing TiO 2 nanoparticle films. Our functionalization concept enabled intermixing a stable covalent attachment of a first layer with a highly versatile and reversible hydrogen bonding through the Hamilton receptor–cyanuric acid binding motif as a second layer. Following this concept, we integrated step‐by‐step a first porphyrin layer and a second porphyrin/BODIPY layer. The individual building blocks and their corresponding combinations were probed with regard to their photophysical properties, and the most promising combinations were implemented in dye‐sensitized solar cells (DSSCs). Relative to the first porphyrin layer adding the second porphyrin/BODIPY layers increased the overall DSSC efficiency by up to 43 %.