中国物理B ›› 2015, Vol. 24 ›› Issue (4): 40202-040202.doi: 10.1088/1674-1056/24/4/040202

• GENERAL • 上一篇    下一篇

Light trapping characteristics of glass substrate with hemisphere pit arrays in thin film Si solar cells

陈乐a b, 王庆康a, 王阳培华a, 黄堃a, 沈向前a   

  1. a Key Laboratory for Thin Film and Micro-fabrication of the Ministry of Education, Department of Microelectronics and Nanoscience, Shanghai Jiao Tong University, Shanghai 200240, China;
    b College of Physical Science and Technology Engineering, Guangxi Universities Key Laboratory of Complex System Optimization and Big Data Processing, Yulin Normal University, Yulin 537400, China
  • 收稿日期:2014-08-09 修回日期:2014-11-01 出版日期:2015-04-05 发布日期:2015-04-05
  • 基金资助:

    Project supported by the National High-Tech Research and Development Program of China (Grant No. 2011AA050518).

Light trapping characteristics of glass substrate with hemisphere pit arrays in thin film Si solar cells

Chen Le (陈乐)a b, Wang Qing-Kang (王庆康)a, Wangyang Pei-Hua (王阳培华)a, Huang Kun (黄堃)a, Shen Xiang-Qian (沈向前)a   

  1. a Key Laboratory for Thin Film and Micro-fabrication of the Ministry of Education, Department of Microelectronics and Nanoscience, Shanghai Jiao Tong University, Shanghai 200240, China;
    b College of Physical Science and Technology Engineering, Guangxi Universities Key Laboratory of Complex System Optimization and Big Data Processing, Yulin Normal University, Yulin 537400, China
  • Received:2014-08-09 Revised:2014-11-01 Online:2015-04-05 Published:2015-04-05
  • Contact: Wang Qing-Kang E-mail:wangqingkang@sjtu.edu.cn
  • Supported by:

    Project supported by the National High-Tech Research and Development Program of China (Grant No. 2011AA050518).

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摘要：

In this paper, the light trapping characteristics of glass substrate with hemisphere pit (HP) arrays in thin film Si solar cells are theoretically studied via a numerical approach. It is found that the HP glass substrate has good antireflection properties. Its surface reflectance can be reduced by ～ 50% compared with planar glass. The HP arrays can make the unabsorbed light return to the absorbing layer of solar cells, and the ratio of second absorption approximately equals 30%. Thus, the glass substrate with the hemisphere pit arrays (HP glass) can effectively reduce the total reflectivity of a solar cell from 20% to 13%. The HP glass can also prolong the optical path length. The numerical results show that the total optical path length of the thin film Si solar cell covered with the HP glass increases from 2ω to 4ω. These results are basically consistent with the experimental results.

关键词: numerical approach, light trapping, hemispherical pit (HP), optical path length, solar cells

Abstract:

In this paper, the light trapping characteristics of glass substrate with hemisphere pit (HP) arrays in thin film Si solar cells are theoretically studied via a numerical approach. It is found that the HP glass substrate has good antireflection properties. Its surface reflectance can be reduced by ～ 50% compared with planar glass. The HP arrays can make the unabsorbed light return to the absorbing layer of solar cells, and the ratio of second absorption approximately equals 30%. Thus, the glass substrate with the hemisphere pit arrays (HP glass) can effectively reduce the total reflectivity of a solar cell from 20% to 13%. The HP glass can also prolong the optical path length. The numerical results show that the total optical path length of the thin film Si solar cell covered with the HP glass increases from 2ω to 4ω. These results are basically consistent with the experimental results.

Key words: numerical approach, light trapping, hemispherical pit (HP), optical path length, solar cells

中图分类号:  (Probability theory, stochastic processes, and statistics)

  • 02.50.-r
07.60.-j (Optical instruments and equipment) 84.60.Jt (Photoelectric conversion) 88.40.H- (Solar cells (photovoltaics))