Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
Effects of Central Metal Ions in Porphyrin-sensitized Solar Cells with Halogen Redox Mediators
Fumiyasu AWAIYonbon ARAIJotaro NAKAZAKISatoshi UCHIDAHiroshi SEGAWA
ジャーナル オープンアクセス HTML

2023 年 91 巻 9 号 p. 097001


Effects of central metal ions in porphyrin-sensitized solar cells were investigated by using 5-(4-carboxyphenyl)-10,15,20-tris(2,4,6-trimethylphenyl)porphyrins as sensitizers and I/I3 or Br/Br3 as redox mediators. Zn(II), Cu(II), Pd(II), and free-base porphyrins were synthesized, and the properties of them and the photovoltaic performances of the dye-sensitized solar cells (DSSCs) using them are compared. The electron injection processes from the dyes into TiO2 were investigated by changing Li+ concentration in the electrolytes. The regeneration processes of the dyes were examined by comparing the electrolytes with different redox potentials (I/I3 or Br/Br3). With the Br/Br3 redox mediator, palladium porphyrin yielded both higher short-circuit current density (Jsc) and open-circuit voltage (Voc) than that with the I/I3 mediator and achieved the highest power conversion efficiency among all combinations in this study.

Fullsize Image
© The Author(s) 2023. Published by ECSJ.

This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium provided the original work is properly cited. [DOI: 10.5796/electrochemistry.23-00060].