TY  - JOUR
PB  - WILEY-V C H VERLAG GMBH
A1  - Hu, Y
A1  - Yella, A
A1  - Guldin, S
A1  - Schreier, M
A1  - Stellacci, F
A1  - Graetzel, M
A1  - Stefik, M
JF  - Advanced Energy Materials
VL  - 4
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
UR  - https://doi.org/10.1002/aenm.201400510
ID  - discovery10125077
EP  - 8
N2  - Cobalt-based electrolytes are highly tunable and have pushed the limits of dye-sensitized solar cells, enabling higher open-circuit voltages and new record efficiencies. However, the performance of these electrolytes and a range of other electrolytes suffer from slow electron transfer at platinum counter electrodes. High surface area platinum would enhance catalysis, but pure platinum structures are too expensive in practice. Here, a material-efficient host-guest architecture is developed that uses an ultrathin layer of platinum deposited upon an electrically conductive scaffold, niobium-doped tin oxide (NTO). This nanostructured composite enhances the counter electrode performance of dye-sensitized solar cells (DSCs) using a Co(II/III)BPY3 electrolyte with an increased fill factor and power conversion efficiency (11.26%), compared to analogous flat films. The modular strategy is elaborated by integrating a light scattering layer onto the counter electrode to reflect unabsorbed light back to the photoanode to improve the short-circuit current density and power conversion efficiency.
IS  - 14
AV  - public
Y1  - 2014/10/07/
TI  - High-Surface-Area Porous Platinum Electrodes for Enhanced Charge Transfer
ER  -