Becker, Mariia; Wyss, Vanessa; Housecroft, Catherine E.; Constable, Edwin C. published an article in 2021. The article was titled 《The influence of alkyl chains on the performance of DSCs employing iron(II) N-heterocyclic carbene sensitizers》, and you may find the article in Dalton Transactions.Related Products of 626-05-1 The information in the text is summarized as follows:
The photovoltaic performances of DSCs employing two new iron(II) N-heterocyclic carbene (NHC) sensitizers are presented. The presence of Bu side chains had a significant impact on DSC performace. The improvement in DSC performance up to 0.93-0.95% was observed for a new heteroleptic sensitizer bearing one carboxylic acid anchoring group. The photovoltaic performance was remarkably affected by sensitization time and by a presence/absence of coadsorbent on the semiconductor surface. The highest photoconversion efficiencies (PCE) were achieved for DSCs sensitized over 17.5 h without addition of coadsorbents. However, for a shorter dipping time of 4 h, the presence of chenodeoxycholic acid improved the PCE from 0.46% (no coadsorbents) to 0.74%, resp. The performance of DSCs based on a new homoleptic complex bearing two Bu side chains and a carboxylic acid anchor on each NHC-ligand was improved from 0.05 to 0.29% via changes in dye-bath concentration and sensitization time. The changes in the dye load on the semiconductor surface depending on the sensitization conditions were confirmed using solid-state UV-Vis spectroscopy and thermogravimetric anal. Electrochem. impedance spectroscopy was used to gain information about the processes occurring at the different interfaces in the DSCs. The impedance response was strongly affected by the immersion time of the photoanodes in the dye-bath solutions In the case of the homoleptic iron(II) complex, a Gerischer impedance was observed after 17.5 h immersion. Shorter dipping times resulted in a decrease in the resistance in the system. For the heteroleptic complex, values of the chem. capacitance and electron lifetime were affected by the immersion time. However, the diffusion length was independent of sensitization conditions. In the experiment, the researchers used many compounds, for example, 2,6-Dibromopyridine(cas: 626-05-1Related Products of 626-05-1)
2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. Pyridine is a relatively complex molecule and exhibits a number of different bands in IR spectra. Among others, the bands characterizing the ν8a and ν19b modes have been found to be sensitive to the coordination or protonation of the molecule. Note that the band that is diagnostic for the PyH+ ion at about 1545 cm− 1 (ν19b mode) does not overlap with any of the other bands.Related Products of 626-05-1