期刊
NANO LETTERS
卷 11, 期 6, 页码 2419-2423出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl200811z
关键词
Solar cell; carbon nanotubes; electrolyte; nonphotoelectrochemical
类别
资金
- National Science Foundation [ECCS-0824157]
- Nanoholdings, LLC
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [0824157] Funding Source: National Science Foundation
A new type of crystalline silicon solar cell is described. Superficially similar to a photoelectrochemical cell a liquid electrolyte creates a depletion (inversion) layer in an n-type silicon wafer, however no regenerative redox couple is present to ferry charge between the silicon and a counter electrode. Instead holes trapped in the electrolyte-induced inversion layer diffuse along the layer until they come to widely spaced grid lines, where they are extracted. The grid lines consist of a single-walled carbon nanotube film etched to cover only a fraction of the n-Si surface. Modeling and simulation shows the inversion layer to be a natural consequence of the device electrostatics. With electronic gating, recently demonstrated to boost the efficiency in related devices, the cell achieves a power conversion efficiency of 12%, exceeding the efficiency of dye sensitized solar cells.
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