Title |
Application of the Tris(acetylacetonato)iron(III)/(II) Redox Couple in p‐Type Dye‐Sensitized Solar Cells
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Published in |
Angewandte Chemie. International Edition, January 2015
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DOI | 10.1002/anie.201409877 |
Pubmed ID | |
Authors |
Ishanie Rangeeka Perera, Torben Daeneke, Satoshi Makuta, Ze Yu, Yasuhiro Tachibana, Amaresh Mishra, Peter Bäuerle, C. André Ohlin, Udo Bach, Leone Spiccia |
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 (1.7×10(8) M(-1) s(-1) ) is very close to the maximum theoretical rate constant of 3.3×10(8) M(-1) s(-1) . Consequently, a very high dye-regeneration yield (>99 %) could be calculated for these devices. |
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