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Fabrication and characterization of silicon wire solar cells having ZnO nanorod antireflection coating on Al-doped ZnO seed layer

Title
Fabrication and characterization of silicon wire solar cells having ZnO nanorod antireflection coating on Al-doped ZnO seed layer
Authors
Baek, Seong-HoNoh, Bum-YoungPark, Il-KyuKim, Jae Hyun
DGIST Authors
Baek, Seong-Ho; Kim, Jae Hyun
Issue Date
2012-01-05
Citation
Nanoscale Research Letters, 7
Type
Article
Article Type
Article
Keywords
Al-Doped ZnOAluminumAnti-ReflectionAnti-Reflection CoatingAnti-Reflection CoatingsAspect RatioAtomic LayerAtomic Layer DepositionAZO FilmsConversion EfficiencyCurrent VoltageDiffusion CoatingsDoping (Additives)FabricationFilm GrowthHigh Aspect RatioHydrothermal GrowthMicrowire ArrayNanorodsOptical FilmsP-N JunctionPower Conversion EfficienciesReflectance SpectrumSeed LayerSi Wire ArraySiliconSilicon MicrowireSilicon WiresSolar CellsSpin-on DopantSurface RecombinationsVertically AlignedWireZinc OxideZnO NanorodZnO Nanorod ArraysZnO Nanorods
ISSN
1931-7573
Abstract
In this study, we have fabricated and characterized the silicon [Si] wire solar cells with conformal ZnO nanorod antireflection coating [ARC] grown on a Al-doped ZnO [AZO] seed layer. Vertically aligned Si wire arrays were fabricated by electrochemical etching and, the pn junction was prepared by spin-on dopant diffusion method. Hydrothermal growth of the ZnO nanorods was followed by AZO film deposition on high aspect ratio Si microwire arrays by atomic layer deposition [ALD]. The introduction of an ALD-deposited AZO film on Si wire arrays not only helps to create the ZnO nanorod arrays, but also has a strong impact on the reduction of surface recombination. The reflectance spectra show that ZnO nanorods were used as an efficient ARC to enhance light absorption by multiple scattering. Also, from the current-voltage results, we found that the combination of the AZO film and ZnO nanorods on Si wire solar cells leads to an increased power conversion efficiency by more than 27% compared to the cells without it. © 2012 Baek et al.
URI
http://hdl.handle.net/20.500.11750/5370
DOI
10.1186/1556-276X-7-29
Publisher
Springer
Related Researcher
Files:
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Collection:
Smart Textile Convergence Research Group1. Journal Articles


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