期刊
NANO LETTERS
卷 10, 期 6, 页码 2092-2096出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl1005433
关键词
Dye-sensitized solar cell; ZnO; nanowire; optical slides; optical fiber
类别
资金
- National Science Foundation (NSF) [DMS 0706436, CMMI 0403671, ENG/CMMI 112024]
- Defense Advanced Research Projects Agency (DARPA) [W31P4Q-08-1-0009]
- Basic Energy Sciences of the Department of Energy (BES DOE) [DE-FG02-07ER46394]
- DARPA/ARO [W911NF-08-1-0249]
- World Premier International Research Center (WPI) Initiative on Materials Nanoarchitectonics, MEXT, Japan
We present a new approach to fabricate three-dimensional (3D) dye-sensitized solar cells (DSSCs) by integrating planar optical waveguide and nanowires (NWs). The ZnO NWs are grown normally to the quartz slide. The 3D cell is constructed by alternatively stacking a slide and a planar electrode. The slide serves as a planar waveguide for light propagation. The 3D structure effectively increases the light absorbing surface area due to internal multiple reflections without increasing electron path length to the collecting electrode, resulting in a significant improvement in energy conversion efficiency by a factor of 5.8 on average compared to the planar illumination case. Our approach demonstrates a new methodology for building large scale and high-efficient 3D solar cells that can be expanded to organic- and inorganic-based solar cells.
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