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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/GA22-24138S" target="_blank" >GA22-24138S: Materiálové inženýrství okraje vodivostního pásu v oxidických polovodičích</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Electrochimica acta

ISSN

0013-4686

e-ISSN

1873-3859

Svazek periodika

517

Číslo periodika v rámci svazku

MAR 2025

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

145758

Kód UT WoS článku

001420424600001

EID výsledku v databázi Scopus

2-s2.0-85216460174