Low-cost, deterministic quasi-periodic photonic structures for light trapping in thin film silicon solar cells
Name
Sheng-2009-Low-cost, deterministic quasi-periodic photonic structures for light trapping in thin film silicon solar cells.pdf
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1.39 MB
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Author(s)
Sheng, Xing
Liu, Jifeng
Michel, Jurgen
Agarwal, Anuradha Murthy
Kimerling, Lionel C.
Date Issued
February 2010
Journal
34th IEEE Photovoltaic Specialists Conference (PVSC), 2009
Publisher
Institute of Electrical and Electronics Engineers
Citation
Xing Sheng et al. “Low-cost, Deterministic Quasi-periodic Photonic Structures for light trapping in thin film silicon solar cells.” Photovoltaic Specialists Conference (PVSC), 2009 34th IEEE. 2009. 002395-002398. © 2010 IEEE.
Version
Final published version
Abstract
Light trapping has been an important issue for thin film silicon solar cells because of the low absorption coefficient in the near infrared range. In this paper, we present a photonic structure which combines anodic aluminum oxide (AAO) and a distributed Bragg reflector (DBR) in the backside of thin film silicon. Simulation results show that this quasi-periodic AAO structure has a stronger light trapping effect than perfectly periodic diffractive gratings. As a proof of concept, we incorporated the backside structure into thick silicon PV cells. By comparing the measured photoconductance of silicon with different backside structures, the enhancement of light absorption near the band edge of silicon is demonstrated for our proposed light trapping structure.
MIT Department
MIT Materials Research Laboratory
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1109/PVSC.2009.5411306
