Optical Properties of ZnO‐Alloyed Nanocrystalline Films

Che, Hui; Huso, Jesse; Morrison, John L.; Thapa, Dinesh; Huso, Michelle; Yeh, Wei Jiang; Tarun, M. C.; McCluskey, M. D.; Bergman, Leah; Sczancoski, ed., J. C.

doi:10.1155/2012/963485

Optical Properties of ZnO‐Alloyed Nanocrystalline Films

Journal Article · Mon May 14 00:00:00 EDT 2012 · Journal of Nanomaterials

DOI:https://doi.org/10.1155/2012/963485· OSTI ID:1198255

Che, Hui; Huso, Jesse; Morrison, John L.; Thapa, Dinesh; Huso, Michelle; Yeh, Wei Jiang; Tarun, M. C.; McCluskey, M. D.; Bergman, Leah; Sczancoski, ed., J. C.

ZnO is emerging as one of the materials of choice for UV applications. It has a deep excitonic energy level and a direct bandgap of ~3.4 eV. Alloying ZnO with certain atomic constituents adds new optical and electronic functionalities to ZnO. This paper presents research on Mg _x Zn _{1− x} O and ZnS _{1− x} O _x nanocrystalline flexible films, which enable tunable optical properties in the deep‐UV and in the visible range. The ZnO and Mg _0.3 Zn _0.7 O films were found to have bandgaps at 3.35 and 4.02 eV, respectively. The photoluminescence of the Mg _0.3 Zn _0.7 O exhibited a bandedge emission at 3.95 eV, and at lower energy 3.38 eV due to the limited solubility inherent to these alloys. ZnS _0.76 O _0.24 and ZnS _0.16 O _0.84 were found to have bandgaps at 3.21 and 2.65 eV, respectively. The effect of nitrogen doping on ZnS _0.16 O _0.84 is discussed in terms of the highly lattice mismatched nature of these alloys and the resulting valence‐band modification.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-07ER46386

OSTI ID:: 1198255

Journal Information:: Journal of Nanomaterials, Journal Name: Journal of Nanomaterials Journal Issue: 1 Vol. 2012; ISSN 1687-4110

Publisher:: Hindawi Publishing CorporationCopyright Statement

Country of Publication:: Egypt

Language:: English

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