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- Title
Application of the Tris(acetylacetonato)iron(III)/(II) Redox Couple in p-Type Dye-Sensitized Solar Cells.
- Authors
Perera, Ishanie Rangeeka; Daeneke, Torben; Makuta, Satoshi; Yu, Ze; Tachibana, Yasuhiro; Mishra, Amaresh; Bäuerle, Peter; Ohlin, C. André; Bach, Udo; Spiccia, Leone
- Abstract
An electrolyte based on the tris(acetylacetonato)iron(III)/(II) redox couple ([Fe(acac)3]0/1−) was developed for p-type dye-sensitized solar cells (DSSCs). Introduction of a NiO blocking layer on the working electrode and the use of chenodeoxycholic acid in the electrolyte enhanced device performance by improving the photocurrent. Devices containing [Fe(acac)3]0/1− and a perylene-thiophene-triphenylamine sensitizer (PMI-6T-TPA) have the highest reported short-circuit current ( JSC=7.65 mA cm−2), and energy conversion efficiency (2.51 %) for p-type DSSCs coupled with a fill factor of 0.51 and an open-circuit voltage VOC=645 mV. Measurement of the kinetics of dye regeneration by the redox mediator revealed that the process is diffusion limited as the dye-regeneration rate constant (1.7×108 M−1 s−1) is very close to the maximum theoretical rate constant of 3.3×108 M−1 s−1. Consequently, a very high dye-regeneration yield (>99 %) could be calculated for these devices.
- Subjects
DYE-sensitized solar cells; CHENODEOXYCHOLIC acid; SHORT-circuit currents; ENERGY conversion; PHOTOEXCITATION
- Publication
Angewandte Chemie, 2015, Vol 127, Issue 12, p3829
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201409877