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Optical characterization of ZnO nanopillars on Si and macroporous periodic Si structure
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Tillämpad materialfysik.
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Tillämpad materialfysik.ORCID-id: 0000-0002-9050-5445
Vise andre og tillknytning
2012 (engelsk)Inngår i: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 111, nr 12, s. 123527-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

ZnO nanopillars were successfully grown using both the vapor-liquid-solid and the aqueous chemical growth methods on different substrates, such as quartz, n-, and p-type non-porous Si wafer (flat) and microporous periodic Si structure (MPSiS). Scanning electron microscopy was employed to compare sample morphologies. The absorption was calculated employing the GW(0) method, based on the local density approximation, and with the projector augmented wave approach. Experiment and theory show a reasonable agreement when the shape of the optical absorption is considered. The measured absorption of ZnO nanopillars, on different substrates, is lower than that observed for ZnO films on quartz substrate, in the energy gap spectral range. A strong effect of MPSiS substrates on ZnO nanopillar properties is observed. The photoluminescence technique was also employed as an optical characterization.

sted, utgiver, år, opplag, sider
2012. Vol. 111, nr 12, s. 123527-
Emneord [en]
Periodic structures, Quartz, Scanning electron microscopy, Silicon, Silicon wafers, Substrates, Vapors, Zinc oxide
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Identifikatorer
URN: urn:nbn:se:kth:diva-99421DOI: 10.1063/1.4729260ISI: 000305832100050Scopus ID: 2-s2.0-84863511506OAI: oai:DiVA.org:kth-99421DiVA, id: diva2:542343
Forskningsfinansiär
Swedish Research Council
Merknad
QC 20120731Tilgjengelig fra: 2012-07-31 Laget: 2012-07-30 Sist oppdatert: 2017-12-07bibliografisk kontrollert

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