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| Home > Publications database > Optical and Electrical Effects of p-type μc-SiOx:H in Thin-Film Silicon Solar Cells on Various Front Textures |
| Journal Article | FZJ-2014-02831 |
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2014
Hindawi Publ. Corp.
New York, NY [u.a.]
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Please use a persistent id in citations: http://hdl.handle.net/2128/7817 doi:10.1155/2014/176965
Abstract: p-type hydrogenated microcrystalline silicon oxide (µc-Si :H) was developed and implemented as a contact layer in hydrogenated amorphous silicon (a-Si:H) single junction solar cells. Higher transparency, sufficient electrical conductivity, low ohmic contact to sputtered ZnO:Al, and tunable refractive index make p-type µc-Si :H a promising alternative to the commonly used p-type hydrogenated microcrystalline silicon (µc-Si:H) contact layers. In this work, p-type µc-Si :H layers were fabricated with a conductivity of up to 10−2 S/cm and a Raman crystallinity of above 60%. Furthermore, we present p-type µc-Si :H films with a broad range of optical properties (2.1 eV < band gap eV and 1.6 < refractive index ). These properties can be tuned by adapting deposition parameters, for example, the CO2/SiH4 deposition gas ratio. A conversion efficiency improvement of a-Si:H solar cells is achieved by applying p-type µc-Si :H contact layer compared to the standard p-type µc-Si:H contact layer. As another aspect, the influence of the front side texture on a-Si:H p-i-n solar cells with different p-type contact layers, µc-Si:H and µc-Si :H, is investigated. Furthermore, we discuss the correlation between the decrease of and the cell surface area derived from AFM measurements.
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