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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 20, Iss. S1 — Jan. 2, 2012
  • pp: A28–A38

A solar photovoltaic system with ideal efficiency close to the theoretical limit

Yuan Zhao, Ming-Yu Sheng, Wei-Xi Zhou, Yan Shen, Er-Tao Hu, Jian-Bo Chen, Min Xu, Yu-Xiang Zheng, Young-Pak Lee, David W. Lynch, and Liang-Yao Chen  »View Author Affiliations


Optics Express, Vol. 20, Issue S1, pp. A28-A38 (2012)
http://dx.doi.org/10.1364/OE.20.000A28


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Abstract

In order to overcome some physical limits, a solar system consisting of five single-junction photocells with four optical filters is studied. The four filters divide the solar spectrum into five spectral regions. Each single-junction photocell with the highest photovoltaic efficiency in a narrower spectral region is chosen to optimally fit into the bandwidth of that spectral region. Under the condition of solar radiation ranging from 2.4 SUN to 3.8 SUN (AM1.5G), the measured peak efficiency under 2.8 SUN radiation reaches about 35.6%, corresponding to an ideal efficiency of about 42.7%, achieved for the photocell system with a perfect diode structure. Based on the detailed-balance model, the calculated theoretical efficiency limit for the system consisting of 5 single-junction photocells can be about 52.9% under 2.8 SUN (AM1.5G) radiation, implying that the ratio of the highest photovoltaic conversion efficiency for the ideal photodiode structure to the theoretical efficiency limit can reach about 80.7%. The results of this work will provide a way to further enhance the photovoltaic conversion efficiency for solar cell systems in future applications.

© 2011 OSA

OCIS Codes
(040.5350) Detectors : Photovoltaic
(230.5170) Optical devices : Photodiodes

ToC Category:
Photovoltaics

History
Original Manuscript: October 10, 2011
Revised Manuscript: November 5, 2011
Manuscript Accepted: November 6, 2011
Published: November 16, 2011

Citation
Yuan Zhao, Ming-Yu Sheng, Wei-Xi Zhou, Yan Shen, Er-Tao Hu, Jian-Bo Chen, Min Xu, Yu-Xiang Zheng, Young-Pak Lee, David W. Lynch, and Liang-Yao Chen, "A solar photovoltaic system with ideal efficiency close to the theoretical limit," Opt. Express 20, A28-A38 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-S1-A28


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