Efficient light incoupling into silicon thin-film solar cells by anti-reflecting MgO/high-compact-AZO with air-side textured glass
- Authors
- Kang, Dong-Won; Lee, Heon-Min; Han, Min-Koo
- Issue Date
- Dec-2013
- Publisher
- IOP PUBLISHING LTD
- Citation
- JOURNAL OF PHYSICS D-APPLIED PHYSICS, v.46, no.48
- Journal Title
- JOURNAL OF PHYSICS D-APPLIED PHYSICS
- Volume
- 46
- Number
- 48
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/74946
- DOI
- 10.1088/0022-3727/46/48/485107
- ISSN
- 0022-3727
1361-6463
- Abstract
- Light incoupling effects have been enhanced at front interfaces of silicon (Si) thin-film solar cells. Firstly, a MgO thin film was introduced at glass substrate/Al-doped ZnO (AZO) interface for anti-reflection effect. We additionally found that the surface morphology of AZO films grown on MgO film after texture-etching is dependent on the compactness of AZO. For high-compact AZO films, the texture-etched MgO/AZO double layer exhibited significantly enhanced light-scattering capability. Secondly, we made textured surfaces at air/glass interface through simple plasma-etching without sacrificial layers or masks by optimizing the etching pressure. The additional air-side texture contributed to further improvement of total light scattering from the MgO/AZO-coated glass substrate. Fabricated microcrystalline Si thin-film solar cells employing the MgO coated glass with air-side surface texture showed decreased cell reflectance and increased quantum efficiency. The J(sc) increased from 21.7 to 26.5 mA cm-(2) and final efficiency of 9.49% was achieved. Based on our experimental results, the suggested structure, the MgO coating on glass substrate of which air-side surface is texture-etched, can offer a promising approach to improve the light incoupling and efficiency of Si thin-film solar cells.
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Collections - College of Engineering > School of Energy System Engineering > 1. Journal Articles
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