Semiconductor nanoparticle/nanofiber composite electrodes
A technology of nanofibers and nanoparticles, applied in the field of dye-sensitized solar cells, which can solve problems such as low efficiency
Inactive Publication Date: 2012-10-03
南达科他州大学
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Problems solved by technology
But unfortunately, based on nanocrystalline TiO 2 The efficiency of nanoparticle DSSCs is influenced by the electron transport rate as well as in nanocrystalline TiO 2 Limitation of low efficiency of light harvesting in membranes
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[0044] In this example, electrospun TiO 2 Nanofibers dispersed in TiO 2 Nanoparticle matrix to form low-cost and high-efficiency DSSCs. The results show that in addition to improving electron transport, nanofibers inserted into the nanoparticle matrix increase the path length of incident light through "Mie scattering", thereby significantly improving light harvesting.
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Abstract
Composite electrode materials for DSSCs, DSSCs incorporating the composite electrode materials and methods for making the composite electrode materials are provided. The composite electrode materials are composed of semiconductor nanofibers embedded in a matrix of semiconductor nanoparticles. DSSCs incorporating the composite electrode materials exhibit both increased carrier transport and improved light harvesting, particularly at wavelengths of 600 nm or greater (e.g., 600 nm to 800 nm or greater).
Description
field of invention [0001] The present invention relates to composite electrode materials comprising wide bandgap semiconductor nanoparticles and wide bandgap semiconductor nanofibers, and to dye-sensitized solar cells incorporating the composite electrode materials. Background of the invention [0002] Photovoltaic (PV) solar cells currently meet less than 0.1% of the world's energy demand, and are expected to meet only about 2% of the world's energy demand at an annual growth rate of 30% in the next 20 years. The limiting factor for its contribution is due to the high cost ($2~$4 / W) of silicon (Si) solar cells due to the need for high-purity silicon and high-temperature manufacturing processes. Almost 90% of the existing PV market is based on silicon cells. Unfortunately, after more than 50 years of development, further breakthroughs in Si PV are unlikely. [0003] Dye-sensitized solar cells (DSSCs) are an alternative to conventional silicon solar cells. A conventional D...
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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/042H01L31/0224
CPCH01G9/2059Y02E10/542H01G9/2031B82Y30/00H01L31/0224H01L31/042
Inventor 乔启全P.乔什冯浩D.加里波厄张立峰
Owner 南达科他州大学
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