Transition Metal Polypyridine Complexes: Studies of Mediation in Dye-Sensitized Solar Cells and Charge Separation
- Colorado State Univ., Fort Collins, CO (United States). Dept. of Chemistry
The Elliott group has long been supported by DOE for studies of cobalt(II/III) trisbypiridine (DTB) mediator complexes in dye sensitized solar cells. Previous work demonstrated that Co(II/III) chemistry is sensitive to the environment, showing unprecedented electrode-surface and electrolyte dependant voltammetry. In electrolytes that have large lipophilic cations, voltammetry of the [Co(DTB)3]2+/3+ couple is nearly Nernstian in appearance on nominally oxide-free metal surfaces. In contrast, on semiconductor electrodes in electrolytes with small, hard cations such as Li+, the electron transfer rates are so slow that it is difficult to measure any Faradaic current even at overpotentials of ±1 V. These studies are of direct relevance to the operation of cobalt-based mediators in solar cells. The research has also shown that these mediators are compatible with copper phenantroline based dyes, in contrast to I- due to the insolubility of CuI.
- Research Organization:
- Colorado State Univ., Fort Collins, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- DOE Contract Number:
- FG02-04ER15591
- OSTI ID:
- 1342993
- Report Number(s):
- DE-FG02-04ER15591
- Country of Publication:
- United States
- Language:
- English
Similar Records
Technetium electrochemistry. 6. Electrochemical behavior of cationic rhenium and technetium complexes in aqueous and aqueous micellar solutions
Dye-sensitized photocathodes for oxygen reduction: efficient H 2 O 2 production and aprotic redox reactions