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Silicon micro-structure and ZnO nanowire hierarchical assortments for light management
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- Dev Choudhury, Bikash (author)
- KTH,Halvledarmaterial, HMA
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- Abedin, Ahmad (author)
- KTH,Integrerade komponenter och kretsar
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- Dev, Apurba (author)
- KTH,Halvledarmaterial, HMA
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- (creator_code:org_t)
- 2013
- 2013
- English.
- In: Optical Materials Express. - 2159-3930 .- 2159-3930. ; 3:8, s. 1039-1048
- Journal article (peer-reviewed)
Abstract
Subject headings
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- We present fabrication and optical characterization of Si microstructure-ZnO nanowire (NWs) hierarchical structures for light management. Random and periodic hierarchical structures constituting Si micro pillar or micro pyramid arrays with overgrown ZnO NWs have been fabricated. Inexpensive colloidal lithography in combination with dry and wet chemical etching is used to fabricate Si microstructures, and ZnO NWs are grown by hydrothermal synthesis. The periodic Si micro pyramid-ZnO NWs hierarchical structure shows broadband antireflection with average reflectance as low as 2.5% in the 300-1000 nm wavelength range. A tenfold enhancement in Raman intensity is observed in this structure compared to planar Si sample. These hierarchical structures with enriched optical properties and high surface to volume ratio are promising for photovoltaic (PV) and sensor applications.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- Solar-Cells
- Arrays
- Nanostructures
- Layers
- Tmah
- Koh
Publication and Content Type
- ref (subject category)
- art (subject category)
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- ENGINEERING AND TECHNOLOGY
- ENGINEERING AND ...
- and Nano technology
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- NATURAL SCIENCES
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- Royal Institute of Technology
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