Low-cost, deterministic quasi-periodic photonic structures for light trapping in thin film silicon solar cells
Author(s)
Sheng, Xing; Liu, Jifeng; Michel, Jurgen; Agarwal, Anuradha Murthy; Kimerling, Lionel C.
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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.
Date issued
2010-02Department
MIT Materials Research Laboratory; Massachusetts Institute of Technology. Department of Materials Science and EngineeringJournal
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
Other identifiers
INSPEC Accession Number: 11152507
ISBN
978-1-4244-2949-3
ISSN
0160-8371