Effect of imidazole-based additives on the voltage of dye sensitized solar cells with Cu(II/I) redox mediators

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F25%3A00605487" target="_blank" >RIV/61388955:_____/25:00605487 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0013468625001215?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0013468625001215?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.electacta.2025.145758" target="_blank" >10.1016/j.electacta.2025.145758</a>

Result language
angličtina
Original language name
Effect of imidazole-based additives on the voltage of dye sensitized solar cells with Cu(II/I) redox mediators
Original language description
Acetonitrile solutions of Cu(tmby)22+ exhibit aging-dependent changes of UV–Vis spectra, which were attributed to partial reduction to Cu(tmby)2+. This effect is boosted by the addition of imidazole bases, i.e., N-methyl-benzimidazole (NMB) or 5‑chloro-1-ethyl-2-methyl-imidazole (CEMI). These bases have only small effect on the diffusion coefficients of Cu(tmby)22+, but downshift the redox potential of Cu(tmby)22+/+ by ca. 0.1–0.2 V. The addition of CEMI to the electrolyte solution decreases the flatband potential of the TiO2 anatase (101) face. The corresponding position of conduction band minimum is upshifted by 0.19 or 0.26 eV, depending on the counterion type, Li+ or Na+, respectively. The formal redox potentials of Cu(tmby)22+/+ in the CEMI-modified electrolyte solution, interrelated with the respective flatband potentials in TiO2, provide a refined estimate of the maximum accessible open-circuit photovoltage of DSSC.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project
<a href="/en/project/GA22-24138S" target="_blank" >GA22-24138S: Materials engineering of the conduction band edge in oxide semiconductors</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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