| Title | Controlled and permanent induced Fermi shifts and upwards band bending in ZnO nanorods by surface stripping with argon bombardment |
|---|---|
| ID_Doc | 19384 |
| Authors | Barnett, CJ; McGettrick, JD; Gangoli, VS; Navarro-Torres, J; Watson, T; Maffeis, TGG; Barron, AR; White, AO |
| Title | Controlled and permanent induced Fermi shifts and upwards band bending in ZnO nanorods by surface stripping with argon bombardment |
| Year | 2021 |
| Published | |
| Abstract | Optimised ZnO nanorod characteristics are essential for novel devices to operate efficiently, especially shifting the n-type nature towards intrinsic or p-type. The effects of argon bombardment for varying amounts of time on the surface chemistry and Fermi level of ZnO nanorods have been studied using XPS. Bombardment at 5 keV removed surface contamination caused by amorphous carbon and OH-, H2O and C-O groups. The bombardment also causes the O1s, Zn2p and valence band to shift to lower binding energies, indicating a shift towards intrinsic behaviour. Bombardment time can be used to effect a shift of up to 0.8 eV, and this shift remains after the nanorods were re-contaminated by exposure to ambient conditions for 28 days. These results indicate that argon bombardment can permanently shift the n-type nature of ZnO to intrinsic for use in novel devices. |
| https://cronfa.swan.ac.uk/Record/cronfa57191/Download/57191__20231__0b8eb3515da04c578bd94406af9431be.pdf |
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