Skip to main content

A Novel Efficient, Iodide-Free Redox Mediator for Dye-Sensitized Solar Cells

  • Zhipan Zhang (a1), Peter. Chaoyu Chen (a2), Shaik Mohammed Zakeeruddin (a3), Jacques-Edouard Moser (a4) and Michael Grätzel (a5)...

A stable organic molecular radical, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), has been electrochemically studied and employed as a new redox mediator in nanocrystalline TiO2 dye-sensitized solar cells (DSCs) when it is doped with nitrosonium tetrafluoroborate (NOBF4). Reasonable photocurrents can be achieved despite of driving force of only 0.2 eV for the TEMPO/TEMPO+ system as compared to 0.6 eV for the iodide/triiodide redox system. Judicious selections of a 5 µm photoanode made from TiO2 mesoscopic particles (60 nm in diameter) and an organic sensitizer with high molar extinction coefficient yield an overall power conversion of 5.0 % under AM 1.5 illumination at 100 mW cm-2 and an incident photon-to-current conversion efficiencies (IPCE) in excess of 50 %.

Hide All
1.O'Regan B.; Grätzel M. Nature 1991, 353, 737.
2.Nazeeruddin M.K.; F. De Angelis; Fantacci S.; Selloni A.; Viscardi G.; Liska P.; Ito S.; Bessho T.; Grätzel M. J. Am. Chem. Soc. 2005, 127, 16835
3.Gregg B. A.; Pichot F.; Ferrere S.; Fields C. R. J. Phys. Chem. B 2001, 105, 14221429.
4. Gregg, Coord B. A.. Chem. Rev. 2004, 248, 12151224
5.Nusbaumer H.; Zakeeruddin S. M.; -E. Moser, J.; Graetzel M. Chem. Eur.J. 2003, 9, 3756
6.Sapp S. A.; Elliott C. M.; Contado C.; Caramori S.; Bignozzi C. A. J. Am. Chem. Soc. 2002, 124, 11215
7.Cazzanti S.; Caramori S.; Argazzi R.; Elliott C.M.; Bignozzi C.A. J. Am. Chem. Soc. 2006, 128, 9996
8.Nishide H.; Suga T. Interface, 2005, 14(4), 32.
9.Barbé C. J.; Arendse F.; Comte P.; Jirousek M.; Lenzmann F.; Shklover V.; Grätzel M. J. Am. Ceram. Soc. 1997, 80, 3157.
10.Ito S.; Chen P.; Comte P.; Nazeeruddin M. K.; Liska P.; Péchy P.; Grätzel M. Submitted.
11.Kavan L.; Grätzel M. Electrochim. Acta 1995, 40, 643.
12.Bard A.J.; Faulkner L.R. Electrochemical Methods: Fundamentals and Applications, second ed., John Wiley and Sons Inc., New York, 2001
13.Suga T.; -J Pu, Y..; Oyaizu K.; Nishide H., Bull. Chem. Soc. Jpn, 2004, 77, 2203
14.Ito S.; Zakeeruddin S. M.; Humphry-Baker R.; Liska P.; Charvet R.; Comte P.; Nazeeruddin M. K.; Péchy P.; Takata M.; Miura H.; Uchida S.; Grätzel M. Adv. Mater. 2006, 18, 1202
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
  • URL: /core/journals/mrs-online-proceedings-library-archive
Please enter your name
Please enter a valid email address
Who would you like to send this to? *



Full text views

Total number of HTML views: 0
Total number of PDF views: 3 *
Loading metrics...

Abstract views

Total abstract views: 99 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 24th February 2018. This data will be updated every 24 hours.