中国物理B ›› 2015, Vol. 24 ›› Issue (5): 54201-054201.doi: 10.1088/1674-1056/24/5/054201

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Realizing high photovoltaic efficiency with parallel multijunction solar cells based on spectrum-splitting and -concentrating diffractive optical element

王进泽a b c, 黄庆礼a b c, 许信a b c, 全宝钢a d, 罗建恒a b c, 张岩e, 叶佳声e, 李冬梅a b c, 孟庆波a b c, 杨国桢a f   

  1. a Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    b Key Laboratory for Renewable Energy, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    c Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    d Laboratory of Microfabrication, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    e Beijing Key Laboratory for THz Spectroscopy and Imaging, Key Laboratory of THz Optoelectronics, Ministry of Education, Beijing 100048, China;
    f Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2014-11-21 修回日期:2014-12-28 出版日期:2015-05-05 发布日期:2015-05-05
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 91233202, 21173260, and 51072221) and the National Basic Research Program of China (Grant No. 2012CB932903).

Realizing high photovoltaic efficiency with parallel multijunction solar cells based on spectrum-splitting and -concentrating diffractive optical element

Wang Jin-Ze (王进泽)a b c, Huang Qing-Li (黄庆礼)a b c, Xu Xin (许信)a b c, Quan Bao-Gang (全宝钢)a d, Luo Jian-Heng (罗建恒)a b c, Zhang Yan (张岩)e, Ye Jia-Sheng (叶佳声)e, Li Dong-Mei (李冬梅)a b c, Meng Qing-Bo (孟庆波)a b c, Yang Guo-Zhen (杨国桢)a f   

  1. a Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    b Key Laboratory for Renewable Energy, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    c Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    d Laboratory of Microfabrication, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    e Beijing Key Laboratory for THz Spectroscopy and Imaging, Key Laboratory of THz Optoelectronics, Ministry of Education, Beijing 100048, China;
    f Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2014-11-21 Revised:2014-12-28 Online:2015-05-05 Published:2015-05-05
  • Contact: Meng Qing-Bo, Yang Guo-Zhen E-mail:qbmeng@iphy.ac.cn;yanggz@iphy.ac.cn
  • About author:42.15.Eq; 42.79.Ek; 88.40.H-; 42.25.Fx
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 91233202, 21173260, and 51072221) and the National Basic Research Program of China (Grant No. 2012CB932903).

摘要:

Based on the facts that multijunction solar cells can increase the efficiency and concentration can reduce the cost dramatically, a special design of parallel multijunction solar cells was presented. The design employed a diffractive optical element (DOE) to split and concentrate the sunlight. A rainbow region and a zero-order diffraction region were generated on the output plane where solar cells with corresponding band gaps were placed. An analytical expression of the light intensity distribution on the output plane of the special DOE was deduced, and the limiting photovoltaic efficiency of such parallel multijunction solar cells was obtained based on Shockley–Queisser's theory. An efficiency exceeding the Shockley–Queisser limit (33%) can be expected using multijunction solar cells consisting of separately fabricated subcells. The results provide an important alternative approach to realize high photovoltaic efficiency without the need for expensive epitaxial technology widely used in tandem solar cells, thus stimulating the research and application of high efficiency and low cost solar cells.

关键词: diffractive optical element, split, concentration, multijunction

Abstract:

Based on the facts that multijunction solar cells can increase the efficiency and concentration can reduce the cost dramatically, a special design of parallel multijunction solar cells was presented. The design employed a diffractive optical element (DOE) to split and concentrate the sunlight. A rainbow region and a zero-order diffraction region were generated on the output plane where solar cells with corresponding band gaps were placed. An analytical expression of the light intensity distribution on the output plane of the special DOE was deduced, and the limiting photovoltaic efficiency of such parallel multijunction solar cells was obtained based on Shockley–Queisser's theory. An efficiency exceeding the Shockley–Queisser limit (33%) can be expected using multijunction solar cells consisting of separately fabricated subcells. The results provide an important alternative approach to realize high photovoltaic efficiency without the need for expensive epitaxial technology widely used in tandem solar cells, thus stimulating the research and application of high efficiency and low cost solar cells.

Key words: diffractive optical element, split, concentration, multijunction

中图分类号:  (Optical system design)

  • 42.15.Eq
42.79.Ek (Solar collectors and concentrators) 88.40.H- (Solar cells (photovoltaics)) 42.25.Fx (Diffraction and scattering)