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Holographic spectrum-splitting optic...
~
Zhang, Deming.
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Holographic spectrum-splitting optical systems for solar photovoltaics.
紀錄類型:
書目-語言資料,印刷品 : Monograph/item
正題名/作者:
Holographic spectrum-splitting optical systems for solar photovoltaics./
作者:
Zhang, Deming.
面頁冊數:
159 p.
附註:
Source: Dissertation Abstracts International, Volume: 74-12(E), Section: B.
Contained By:
Dissertation Abstracts International74-12B(E).
標題:
Physics, Optics. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3592793
ISBN:
9781303343438
Holographic spectrum-splitting optical systems for solar photovoltaics.
Zhang, Deming.
Holographic spectrum-splitting optical systems for solar photovoltaics.
- 159 p.
Source: Dissertation Abstracts International, Volume: 74-12(E), Section: B.
Thesis (Ph.D.)--The University of Arizona, 2013.
Solar energy is the most abundant source of renewable energy available. The relatively high cost prevents solar photovoltaic (PV) from replacing fossil fuel on a larger scale. In solar PV power generation the cost is reduced with more efficient PV technologies. In this dissertation, methods to improve PV conversion efficiency with holographic optical components are discussed.
ISBN: 9781303343438Subjects--Topical Terms:
1018756
Physics, Optics.
Holographic spectrum-splitting optical systems for solar photovoltaics.
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Source: Dissertation Abstracts International, Volume: 74-12(E), Section: B.
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Solar energy is the most abundant source of renewable energy available. The relatively high cost prevents solar photovoltaic (PV) from replacing fossil fuel on a larger scale. In solar PV power generation the cost is reduced with more efficient PV technologies. In this dissertation, methods to improve PV conversion efficiency with holographic optical components are discussed.
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The tandem multiple-junction approach has achieved very high conversion efficiency. However it is impossible to manufacture tandem PV cells at a low cost due to stringent fabrication standards and limited material types that satisfy lattice compatibility. Current produced by the tandem multi-junction PV cell is limited by the lowest junction due to series connection. Spectrum-splitting is a lateral multi-junction concept that is free of lattice and current matching constraints. Each PV cell can be optimized towards full absorption of a spectral band with tailored light-trapping schemes. Holographic optical components are designed to achieve spectrum-splitting PV energy conversion. The incident solar spectrum is separated onto multiple PV cells that are matched to the corresponding spectral band. Holographic spectrum-splitting can take advantage of existing and future low-cost technologies that produces high efficiency thin-film solar cells. Spectrum-splitting optical systems are designed and analyzed with both transmission and reflection holographic optical components. Prototype holograms are fabricated and high optical efficiency is achieved.
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Light-trapping in PV cells increases the effective optical path-length in the semiconductor material leading to improved absorption and conversion efficiency. It has been shown that the effective optical path length can be increased by a factor of 4n2 using diffusive surfaces. Ultra-light-trapping can be achieved with optical filters that limit the escape angle of the diffused light. Holographic reflection gratings have been shown to act as angle-wavelength selective filters that can function as ultra-light-trapping filters. Results from an experimental reflection hologram are used to model the absorption enhancement factor for a silicon solar cell and light-trapping filter. The result shows a significant improvement in current generation for thin-film silicon solar cells under typical operating conditions.
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