Subnanometer Ga 2 O 3 Tunnelling Layer by Atomic Layer Deposition to Achieve 1.1 V Open-Circuit Potential in Dye-Sensitized Solar Cells
AuthorsChandiran, Aravind Kumar
Nazeeruddin, Mohammad Khaja
KAUST Grant NumberKUS-C1-015- 21
Permanent link to this recordhttp://hdl.handle.net/10754/599795
MetadataShow full item record
AbstractHerein, we present the first use of a gallium oxide tunnelling layer to significantly reduce electron recombination in dye-sensitized solar cells (DSC). The subnanometer coating is achieved using atomic layer deposition (ALD) and leading to a new DSC record open-circuit potential of 1.1 V with state-of-the-art organic D-π-A sensitizer and cobalt redox mediator. After ALD of only a few angstroms of Ga 2O 3, the electron back reaction is reduced by more than an order of magnitude, while charge collection efficiency and fill factor are increased by 30% and 15%, respectively. The photogenerated exciton separation processes of electron injection into the TiO 2 conduction band and the hole injection into the electrolyte are characterized in detail. © 2012 American Chemical Society.
CitationChandiran AK, Tetreault N, Humphry-Baker R, Kessler F, Baranoff E, et al. (2012) Subnanometer Ga 2 O 3 Tunnelling Layer by Atomic Layer Deposition to Achieve 1.1 V Open-Circuit Potential in Dye-Sensitized Solar Cells . Nano Lett 12: 3941–3947. Available: http://dx.doi.org/10.1021/nl301023r.
SponsorsThe authors acknowledge the financial contribution from EU FP7 project "ORION" grant agreement no. NMP-229036. This publication is partially based on work supported by the Center for Advanced Molecular Photovoltaics (award no. KUS-C1-015- 21), made by King Abdullah University of Science and Technology (KAUST). A.K.C. is grateful for financial support from the Balzan foundation as part of the 2009 Balzan Prize award to M.G. A.K.C. also thanks Dr. Hoi Nok Tsao and Dr. Aswani Yella for their valuable suggestions on electrolyte composition.
PublisherAmerican Chemical Society (ACS)
CollectionsPublications Acknowledging KAUST Support
- The importance of dye chemistry and TiCl4 surface treatment in the behavior of Al2O3 recombination barrier layers deposited by atomic layer deposition in solid-state dye-sensitized solar cells.
- Authors: Brennan TP, Bakke JR, Ding IK, Hardin BE, Nguyen WH, Mondal R, Bailie CD, Margulis GY, Hoke ET, Sellinger A, McGehee MD, Bent SF
- Issue date: 2012 Sep 21
- Atomic layer deposition of high performance ultrathin TiO₂ blocking layers for dye-sensitized solar cells.
- Authors: Kim DH, Woodroof M, Lee K, Parsons GN
- Issue date: 2013 Jun
- Charge collection and pore filling in solid-state dye-sensitized solar cells.
- Authors: Snaith HJ, Humphry-Baker R, Chen P, Cesar I, Zakeeruddin SM, Grätzel M
- Issue date: 2008 Oct 22
- Chlorophyll-a derivatives with various hydrocarbon ester groups for efficient dye-sensitized solar cells: static and ultrafast evaluations on electron injection and charge collection processes.
- Authors: Wang XF, Tamiaki H, Wang L, Tamai N, Kitao O, Zhou H, Sasaki S
- Issue date: 2010 May 4
- Dye-sensitized solar cells: driving-force effects on electron recombination dynamics with cobalt-based shuttles.
- Authors: DeVries MJ, Pellin MJ, Hupp JT
- Issue date: 2010 Jun 1