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Optical Engineering

Optimization of plasmonic cavity-resonant multijunction cells
Author(s): Albert Lin; Sze-Ming Fu; Yan-Kai Zhong; Chi-Wei Tseng; Shih-yun Lai; Timothy Ching Kwok Lau
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Paper Abstract

Improving spectral photon harvesting is important for thin-film multijunction cells. We show that efficient spectral flux management can be achieved using genetic algorithm-optimized surface plasmon (SP) cavity-resonant type multijunction cells. We also observe that the excitation of the SP quasi-guided mode, Fabry–Perot mode, and SP polariton significantly enhance the photocurrent of multijunction cells. Two types of cavity structures are investigated. For the optimized SP intermediate reflector and bottom-grating cavity, the resonant cavity mode efficiently increases the long-wavelength absorption in the bottom cell by 63.27%, resulting in reduced absorbance asymmetry between the top and the bottom cells. Accordingly, the matched integrated absorbance is increased by 14.92%. For the optimized SP top- and bottom-grating (TBG) cavity, the integrated absorbance and current matching are improved due to the higher transmission through the solar cell front surface and the excitation of the quasi-guided mode with a more localized field in the bottom cell. The matched integrated absorbance is improved by 85.68% for the TBG cavity.

Paper Details

Date Published: 11 June 2013
PDF: 9 pages
Opt. Eng. 52(6) 064002 doi: 10.1117/1.OE.52.6.064002
Published in: Optical Engineering Volume 52, Issue 6
Show Author Affiliations
Albert Lin, National Chiao-Tung Univ. (Taiwan)
Sze-Ming Fu, National Chiao Tung Univ. (Taiwan)
Yan-Kai Zhong, National Chiao Tung Univ. (Taiwan)
Chi-Wei Tseng, National Chiao Tung Univ. (Taiwan)
Shih-yun Lai, National Chiao Tung Univ. (Taiwan)
Timothy Ching Kwok Lau, National Chiao Tung Univ. (Taiwan)

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