+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Fast Low-Spin Cobalt Complex Redox Shuttles for Dye-Sensitized Solar Cells

Fast Low-Spin Cobalt Complex Redox Shuttles for Dye-Sensitized Solar Cells

Journal of Physical Chemistry Letters 4(2): 328-332

A low-spin cobalt(II) complex, cobalt bis(trithiacyclononane), [Co(ttcn)2](3+/2+), was investigated for use as a redox shuttle in dye-sensitized solar cells, DSSCs. This unique cobalt complex redox shuttle is stable, transparent, and easy to synthesize from commercial ligands and has attractive energetic and kinetic features for use in DSSCs. Initial results indicate that the overall performance is limited by recombination. Variation of the sensitizer and deposition of an ultrathin coating of alumina on nanoparticle-based TiO2 DSSC photoanodes reduced recombination, which resulted in significantly improved quantum yields. The photovoltaic behavior was compared to the current record efficiency cobalt tris-bipyridine, [Co(bpy)3](3+/2+), redox shuttle and produced similar results. Further use of high extinction organic sensitizers with only ∼200 mV of driving force for regeneration was examined, which produced efficiencies of over 2%; importantly, regeneration is not rate-limiting in this system, thus demonstrating the promise of using such fast redox shuttles.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 057865220

Download citation: RISBibTeXText

PMID: 26283443

DOI: 10.1021/jz301934e

Related references

Spin-Doctoring Cobalt Redox Shuttles for Dye-Sensitized Solar Cells. Inorganic Chemistry: -, 2018

High-Performance Porphyrin-Based Dye-Sensitized Solar Cells with Iodine and Cobalt Redox Shuttles. Chemsuschem 10(5): 938-945, 2016

Bifurcation of Regeneration and Recombination in Dye-Sensitized Solar Cells via Electronic Manipulation of Tandem Cobalt Redox Shuttles. Acs Applied Materials & Interfaces 9(39): 33544-33548, 2017

Direct light-induced polymerization of cobalt-based redox shuttles: an ultrafast way towards stable dye-sensitized solar cells. Chemical Communications 51(91): 16308-16311, 2015

Roles of electrolytes on charge recombination in dye-sensitized TiO(2) solar cells (2): the case of solar cells using cobalt complex redox couples. Journal of Physical Chemistry. B 109(8): 3488-3493, 2006

A new terpyridine cobalt complex redox shuttle for dye-sensitized solar cells. Inorganica Chimica Acta 406: 106-112, 2013

A novel organic sensitizer combined with a cobalt complex redox shuttle for dye-sensitized solar cells. Organic Letters 14(10): 2532-2535, 2012

Electronic tuning of nickel-based bis(dicarbollide) redox shuttles in dye-sensitized solar cells. Angewandte Chemie 49(31): 5339-5343, 2010

Kinetics of Iodine-Free Redox Shuttles in Dye-Sensitized Solar Cells: Interfacial Recombination and Dye Regeneration. Accounts of Chemical Research 48(6): 1541-1550, 2015

Dye-sensitized solar cells: driving-force effects on electron recombination dynamics with cobalt-based shuttles. Langmuir 26(11): 9082-9087, 2010

Highly efficient Mo2C nanotubes as a counter electrode catalyst for organic redox shuttles in dye-sensitized solar cells. Chemical Communications 50(57): 7625-7627, 2014

A channel flow cell system specifically designed to test the efficiency of redox shuttles in dye sensitized solar cells. Solar Energy Materials and Solar Cells 70(1): 85-101, 2001

High electrocatalytic activity of self-standing hollow NiCo2S4 single crystalline nanorod arrays towards sulfide redox shuttles in quantum dot-sensitized solar cells. Chemical Communications 49(100): 11734-6, 2013

A new direction in dye-sensitized solar cells redox mediator development: in situ fine-tuning of the cobalt(II)/(III) redox potential through Lewis base interactions. Journal of the American Chemical Society 134(40): 16646-16653, 2013

Cobalt(II/III) redox electrolyte in ZnO nanowire-based dye-sensitized solar cells. Acs Applied Materials & Interfaces 5(6): 1902-1906, 2013