| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1522167 | Materials Chemistry and Physics | 2014 | 5 Pages |
•Au-functionalized ZnSe nanorods were synthesized.•The intensity of NBE emission of ZnSe nanorods was enhanced remarkably by Au-coating and H2 annealing.•The increase in INBE/IDL is due to surface plasmon resonance and hydrogen passivating defects.•H2 annealing is more efficient in enhancing NBE emission than N2 annealing.
Au-functionalized ZnSe nanorods were synthesized by the thermal evaporation of ZnSe powder followed by Au sputter-deposition and thermal annealing. Photoluminescence (PL) showed that the intensity of near-band edge (NBE) emission of ZnSe nanorods was enhanced remarkably by Au-coating and annealing in a H2 atmosphere. The intensity ratio of NBE emission to the deep level emission, INBE/IDL of Au-coated ZnSe nanorods after annealing in a H2 atmosphere was ∼68 times higher than that of the pristine (unannealed, uncoated) ZnSe nanorods. The increase in INBE/IDL might be due to a combination of carrier transfer from the defect level to the Fermi level of Au nanoparticles, surface plasmon resonance in Au nanoparticles and hydrogen passivated deep level defects.
