Journal article
Microstructural changes in CdSe-coated ZnO nanowires evaluated by in situ annealing in transmission electron microscopy and x-ray diffraction
Nanotechnology, v 23(26), pp 265701-265701
15 Jun 2012
PMID: 22699426
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
We report on the crystallite growth and phase change of electrodeposited CdSe coatings on ZnO nanowires during annealing. Both in situ transmission electron microscopy (TEM) and x-ray diffraction (XRD) reveal that the nanocrystal size increases from ∼3 to ∼10 nm upon annealing at 350 °C for 1 h and then to more than 30 nm during another 1 h at 400 °C, exhibiting two distinct growth regimes. Nanocrystal growth occurs together with a structural change from zinc blende to wurtzite. The structural transition begins at 350 °C, which results in the formation of stacking faults. Increased crystallite size, comparable to the coating thickness, can improve charge separation in extremely thin absorber solar cells. We demonstrate a nearly two-fold improvement in power conversion efficiency upon annealing.
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Details
- Title
- Microstructural changes in CdSe-coated ZnO nanowires evaluated by in situ annealing in transmission electron microscopy and x-ray diffraction
- Creators
- Hasti Majidi - Drexel University Department of Chemical and Biological Engineering, Philadelphia, PA 19104, USAChristopher R Winkler - Drexel University Department of Materials Science and Engineering, Philadelphia, PA 19104, USAMitra L Taheri - Drexel University Department of Materials Science and Engineering, Philadelphia, PA 19104, USAJason B Baxter - Drexel University Department of Chemical and Biological Engineering, Philadelphia, PA 19104, USA
- Publication Details
- Nanotechnology, v 23(26), pp 265701-265701
- Publisher
- IOP Publishing
- Number of pages
- 7
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000305411400013
- Scopus ID
- 2-s2.0-84862670412
- Other Identifier
- 991014877678704721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied