Light Management

Comparative investigation on designs of light absorption enhancement of ultrathin crystalline silicon for photovoltaic applications

[+] Author Affiliations
Yi Huang, Wei Wang, Wu Pan, Weizhong Chen, Zhen Wang

Chongqing University of Posts and Telecommunications, School of Photoelectrical Engineering, Nan'an District, Chongqing 400065, China

Xinyu Tan

China Three Gorges University, College of Materials and Chemical Engineering, Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, 8 University Avenue, Yichang 443002, China

Wensheng Yan

Chongqing University of Posts and Telecommunications, School of Photoelectrical Engineering, Nan'an District, Chongqing 400065, China

Karlsruhe Institute of Technology, Institute of Microstructure Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

J. Photon. Energy. 6(4), 047001 (Nov 12, 2016). doi:10.1117/1.JPE.6.047001
History: Received June 13, 2016; Accepted October 24, 2016
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Abstract.  Ultrathin crystalline silicon wafers for photovoltaic applications have attracted intensive attention because of potential benefits in cost-effectiveness. Structural design with high light absorption is important for photovoltaics because planar ultrathin silicon is poor in absorption. We conduct a comparative investigation on designs of light absorption enhancement for 2-μm-thick ultrathin crystalline silicon, where the front texture is a nanopyramidal structure and the rear adopts several designs. Our calculation results show that both of the ultrathin silicon with front nanopyramids and rear silver nanoarrays and the ultrathin silicon with two-sided nanopyramids are promising for photovoltaic applications. For the latter design, the calculated photocurrent achieves the highest value of 35.1  mA/cm2 when a perfect electric conductor layer is applied at the bottom. In contrast, the former design has a lower photocurrent value of 31.2  mA/cm2. But, this design is of practical significance because the majority of experimental reports on ultrathin crystalline silicon solar cells are single-sided front-textured at present and the fabrication techniques of plasmonic Ag nanoarrays are matured. Compared with previous reports, the present work offers a multiple option of structural designs for ultrathin crystalline silicon to enhance the light absorption for photovoltaic applications.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Yi Huang ; Wei Wang ; Wu Pan ; Weizhong Chen ; Zhen Wang, et al.
"Comparative investigation on designs of light absorption enhancement of ultrathin crystalline silicon for photovoltaic applications", J. Photon. Energy. 6(4), 047001 (Nov 12, 2016). ; http://dx.doi.org/10.1117/1.JPE.6.047001


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