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Development of Hydrogenated Microcrystalline Silicon-Germanium Alloys for Improving Long-Wavelength Absorption in Si-Based Thin-Film Solar Cells
Joint Authors
Huang, Yen-Tang
Tsai, Chuang-Chuang
Hsu, Hung-Jung
Liang, Shin-Wei
Hsu, Cheng-Hang
Source
International Journal of Photoenergy
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-07-22
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
Hydrogenated microcrystalline silicon-germanium (μc-Si1-xGex:H) alloys were developed for application in Si-based thin-film solar cells.
The effects of the germane concentration (RGeH4) and the hydrogen ratio (RH2) on the μc-Si1-xGex:H alloys and the corresponding single-junction thin-film solar cells were studied.
The behaviors of Ge incorporation in a-Si1-xGex:H and μc-Si1-xGex:H were also compared.
Similar to a-Si1-xGex:H, the preferential Ge incorporation was observed in μc-Si1-xGex:H.
Moreover, a higher RH2 significantly promoted Ge incorporation for a-Si1-xGex:H, while the Ge content was not affected by RH2 in μc-Si1-xGex:H growth.
Furthermore, to eliminate the crystallization effect, the 0.9 μm thick absorbers with a similar crystalline volume fraction were applied.
With the increasing RGeH4, the accompanied increase in Ge content of μc-Si1-xGex:H narrowed the bandgap and markedly enhanced the long-wavelength absorption.
However, the bias-dependent EQE measurement revealed that too much Ge incorporation in absorber deteriorated carrier collection and cell performance.
With the optimization of RH2 and RGeH4, the single-junction μc-Si1-xGex:H cell achieved an efficiency of 5.48%, corresponding to the crystalline volume fraction of 50.5% and Ge content of 13.2 at.%.
Compared to μc-Si:H cell, the external quantum efficiency at 800 nm had a relative increase by 33.1%.
American Psychological Association (APA)
Huang, Yen-Tang& Hsu, Hung-Jung& Liang, Shin-Wei& Hsu, Cheng-Hang& Tsai, Chuang-Chuang. 2014. Development of Hydrogenated Microcrystalline Silicon-Germanium Alloys for Improving Long-Wavelength Absorption in Si-Based Thin-Film Solar Cells. International Journal of Photoenergy،Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-1037188
Modern Language Association (MLA)
Huang, Yen-Tang…[et al.]. Development of Hydrogenated Microcrystalline Silicon-Germanium Alloys for Improving Long-Wavelength Absorption in Si-Based Thin-Film Solar Cells. International Journal of Photoenergy No. 2014 (2014), pp.1-7.
https://search.emarefa.net/detail/BIM-1037188
American Medical Association (AMA)
Huang, Yen-Tang& Hsu, Hung-Jung& Liang, Shin-Wei& Hsu, Cheng-Hang& Tsai, Chuang-Chuang. Development of Hydrogenated Microcrystalline Silicon-Germanium Alloys for Improving Long-Wavelength Absorption in Si-Based Thin-Film Solar Cells. International Journal of Photoenergy. 2014. Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-1037188
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1037188