Silicon micro-structure and ZnO nanowire hierarchical assortments for light management
2013 (English)In: Optical Materials Express, ISSN 2159-3930, Vol. 3, no 8, 1039-1048 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2013. Vol. 3, no 8, 1039-1048 p.
Solar-Cells, Arrays, Nanostructures, Layers, Tmah, Koh
Nano Technology Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-127416DOI: 10.1364/OME.3.001039ISI: 000322630100004ScopusID: 2-s2.0-84884197449OAI: oai:DiVA.org:kth-127416DiVA: diva2:644088
FunderSwedish Research CouncilEU, FP7, Seventh Framework Programme
QC 201309022013-08-292013-08-292016-04-07Bibliographically approved