University of Oulu

Zhongjia Huang, Xinying Shi, Gang Wang, Petri Leukkunen, Marko Huttula, Wei Cao, Antireflective design of Si-based photovoltaics via biomimicking structures on black butterfly scales, Solar Energy, Volume 204, 2020, Pages 738-747, ISSN 0038-092X,

Antireflective design of Si-based photovoltaics via biomimicking structures on black butterfly scales

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Author: Huang, Zhongjia1,2; Shi, Xinying3; Wang, Gang1,2;
Organizations: 1School of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu 241000, China
2Nano and Molecular Systems Research Unit, University of Oulu, P.O. Box 3000, FIN-90014 Oulu, Finland
3School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1.1 MB)
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Language: English
Published: Elsevier, 2020
Publish Date: 2022-05-20


The naturally evolved sunlight harvesters are not limited to foliage. Animals also harvest sunlight for light-heat conversion. A typical antireflective and light-trapping scheme has been well demonstrated on thin butterfly scales where solar energy is converted to heat besides being diffracted for surface coloration. Biomimicking scale structures offers a unique route to enhance light harvesting efficiencies happening on manmade solar cells. Herein, we performed a computational investigation of using microstructures on black butterflies for solar cell efficiency enhancement. Scale microstructures were obtained from nine species of black butterflies and employed as coating structures in numerical models built on Si-slabs. Introducing butterfly wing structures not only reduces the light reflection and transmittance but also increases the light absorption within Si-slabs. Surface reflection was decreased down to 10%, and the short-circuit current was increased by 66% correspondingly. An antireflection design strategy is given and hoped to benefit light harvesting in Si-based solar cells eventually.

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Series: Solar energy
ISSN: 0038-092X
ISSN-E: 1471-1257
ISSN-L: 0038-092X
Volume: 204
Pages: 738 - 747
DOI: 10.1016/j.solener.2020.05.031
Type of Publication: A1 Journal article – refereed
Field of Science: 221 Nanotechnology
Funding: The authors acknowledge the financial supports from the Academy of Finland (No. 311934), the National Natural Science Foundation of China (No. 61904069), and funding from Anhui Polytechnic University (No. 2016BJRC005) and the Natural Science Foundation of Jiangsu Higher Education Institutions of China (No. 19KJB140008). W.C. thanks the Anhui Provincial Grant for high-level platform construction.
Copyright information: © 2020 International Solar Energy Society. Published by Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license