Details

Autor(en) / Beteiligte

• Pan, C.J.
• Chen, C.W.
• Chen, J.Y.
• Huang, P.J.
• Chi, G.C.
• Chang, C.Y.
• Ren, F.
• Pearton, S.J.

Titel

Optical and structural properties of Eu-diffused and doped ZnO nanowires

Ist Teil von

• Applied surface science, 2009-10, Vol.256 (1), p.187-190

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2009

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Single crystal ZnO nanowires diffused with europium (Eu) from a solid source at 900 °C for 1 h or doped with Eu during growth have been characterized. The ZnO nanowires were grown by chemical vapor deposition on Si substrates employing Au as a catalyst. The diameter of the resulting nanowires was ∼200 nm with a length of 1 μm. Photoluminescence spectra excited by a He–Cd laser at room temperature showed the green luminescence at 515 nm in Eu-diffused nanowires. A small red shift of near-band-edge emission of ZnO nanowires was observed in the diffused wires, but sharp emission from Eu 3 ions was not present. Transmission electron microscopy shows crystalline Eu 2O 3 formation on the diffused nanowire surface, which forms a coaxial heterostructure system. When Eu was incorporated during the nanowire growth, the sharp 5D O– 7F 2 transition of the Eu 3+ ion at around 615 nm was observed.