Yan, Wenjing ; Mechau, Norman ; Hahn, Horst ; Krupke, Ralph (2010)
Ultraviolet photodetector arrays assembled by dielectrophoresis of ZnO nanoparticles.
In: Nanotechnology, 21 (11)
doi: 10.1088/0957-4484/21/11/115501
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Sensitive and fast ultraviolet sensor arrays have been produced by dielectrophoretic assembling of ZnO nanoparticles. The sub-micron device dimensions induce low operating voltage and low power consumption. The devices are long-term stable and operate in air, oxygen and nitrogen. We have determined the absorption and desorption dynamics from the time-resolved photoresponse and conclude that oxygen or carbon dioxide are the photodesorbed species. We could derive the charge carrier concentration and mobility of the device from measurements of the low-bias and high-bias photocurrent. The presence of defects is discussed by comparing electroluminescence spectra from biased devices with photoluminescence spectral maps of ZnO dispersions.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2010 |
| Autor(en): | Yan, Wenjing ; Mechau, Norman ; Hahn, Horst ; Krupke, Ralph |
| Art des Eintrags: | Bibliographie |
| Titel: | Ultraviolet photodetector arrays assembled by dielectrophoresis of ZnO nanoparticles |
| Sprache: | Englisch |
| Publikationsjahr: | 19 März 2010 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Nanotechnology |
| Jahrgang/Volume einer Zeitschrift: | 21 |
| (Heft-)Nummer: | 11 |
| DOI: | 10.1088/0957-4484/21/11/115501 |
| Kurzbeschreibung (Abstract): | Sensitive and fast ultraviolet sensor arrays have been produced by dielectrophoretic assembling of ZnO nanoparticles. The sub-micron device dimensions induce low operating voltage and low power consumption. The devices are long-term stable and operate in air, oxygen and nitrogen. We have determined the absorption and desorption dynamics from the time-resolved photoresponse and conclude that oxygen or carbon dioxide are the photodesorbed species. We could derive the charge carrier concentration and mobility of the device from measurements of the low-bias and high-bias photocurrent. The presence of defects is discussed by comparing electroluminescence spectra from biased devices with photoluminescence spectral maps of ZnO dispersions. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Molekulare Nanostrukturen 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 08 Nov 2011 11:52 |
| Letzte Änderung: | 05 Mär 2013 09:55 |
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