| 项目编号: | 1438147
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| 项目名称: | Ultrafast multiexciton kinetics in solar photovoltaics beyond the Shockley-Queisser limit |
| 作者: | Chee Wei Wong
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| 承担单位: | Columbia University
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| 批准年: | 2013
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| 开始日期: | 2014-09-01
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| 结束日期: | 2015-02-28
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| 资助金额: | USD332170
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Engineering - Chemical, Bioengineering, Environmental, and Transport Systems
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| 英文关键词: | nanostructured photovoltaic material
; ultrafast multiexciton kinetics
; single electron shockley queisser limit
; fundamental understanding
; photovoltaic device
; multiexciton kinetics
; nanostructured photovoltaic
; new photovoltaic material
; solar energy conversion efficiency
; transparent high-mobility graphene electrode photovoltaic
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| 英文摘要: | Principal Investigator: Chee Wei Wong
Number: 1438147
The sun represents the most abundant potential source of pollution-free energy on earth. Solar cells for producing electricity require materials that absorb the sun's energy and convert its photons to electrons, a process called photovoltaics. To be competitive with fossil fuels, the cost of solar photovoltaic (PV) systems must be reduced, which is realized in part by increasing the solar energy conversion efficiency and by reducing the cost of solar PV materials. Recently, new photovoltaic materials have been discovered that harness the quantum physics behavior of inorganic semiconductor compounds ordered at the nanoscale to increase the solar energy conversion efficiency. The discovery of new and inexpensive materials for this next generation of photovoltaic devices is enabled by fundamental understanding of the interaction of light with these materials. The goal of this project is to develop a fundamental understanding of quantum physics processes in nanostructured photovoltaic materials which convert a single photon from light into multiple electrons, and thus surpass the single electron Shockley Queisser limit. The research will make use of advanced spectroscopic techniques which can probe multiexciton generation processes at ultrafast scales. Educational activities offered by the project focus on the development of a series of teaching and laboratory modules on solar energy, nanoscience, and sustainable energy, with content targeted separately to grade-school level students, low income, college-bound high school students in the New York City area, and undergraduate students at Columbia University.
Technical Description
The overall goal of this project is to develop a fundamental understanding of multi-exciton generation in nanostructured photovoltaic materials. The proposed research will study ultrafast multiexciton kinetics and generation in zero-dimensional and surface-modified nanostructures, as well as ultrafast multiexciton kinetics and collection in one-dimensional nanostructures and assemblies. This information will be used to harness multiexciton energy and electron transfer processes in nanostructured photovoltaics for improved solar energy conversion efficiency. Super-continuum ultrafast spectroscopy will be used to probe multiexciton kinetics and multiexciton efficiencies in semiconducting nanocrystals, nanorods, and nanostructures to elucidate the fundamental mechanisms. These studies will be extended to examine exciton and electron transfer of nanostructures in transparent high-mobility graphene electrode photovoltaics, using time- and spectrally-resolved studies and fast exciton quenching through blinking statistics of single nanostructures. Educational and outreach activities offered by the project focus on the development and delivery of a series of teaching and laboratory modules on solar energy, nanoscience, and sustainable energy, with content targeted separately to grade-school level students, low income, college-bound high school students in the New York City area, and undergraduate students at Columbia University. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95930
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Chee Wei Wong. Ultrafast multiexciton kinetics in solar photovoltaics beyond the Shockley-Queisser limit. 2013-01-01.
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