Hirsch, S. ; Komissinskiy, Philipp ; Flege, Stefan ; Li, S. ; Rachut, Karsten ; Klein, Andreas ; Alff, Lambert (2021)
Modification of energy band alignment and electric properties of Pt/Ba₀.₆Sr₀.₄TiO₃/Pt thin-film ferroelectric varactors by Ag impurities at interfaces.
In: Journal of Applied Physics, 2014, 115 (24)
doi: 10.26083/tuprints-00019928
Article, Secondary publication, Publisher's Version
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| Item Type: | Article |
|---|---|
| Type of entry: | Secondary publication |
| Title: | Modification of energy band alignment and electric properties of Pt/Ba₀.₆Sr₀.₄TiO₃/Pt thin-film ferroelectric varactors by Ag impurities at interfaces |
| Language: | English |
| Date: | 2021 |
| Place of Publication: | Darmstadt |
| Year of primary publication: | 2014 |
| Publisher: | AIP Publishing |
| Journal or Publication Title: | Journal of Applied Physics |
| Volume of the journal: | 115 |
| Issue Number: | 24 |
| Collation: | 5 Seiten |
| DOI: | 10.26083/tuprints-00019928 |
| Corresponding Links: | |
| Origin: | Secondary publication service |
| Abstract: | We report on the effects of Ag impurities at interfaces of parallel-plate Pt/Ba₀.₆Sr₀.₄TiO₃/Pt thin film ferroelectric varactors. Ag impurities occur at the interfaces due to diffusion of Ag from colloidal silver paint used to attach the varactor samples with their back side to the plate heated at 600–750 °C during deposition of Ba₀.₆Sr₀.₄TiO₃. X-ray photoelectron spectroscopy and secondary ion mass spectrometry suggest that amount and distribution of Ag adsorbed at the interfaces depend strongly on the adsorbent surface layer. In particular, Ag preferentially accumulates on top of the Pt bottom electrode. The presence of Ag significantly reduces the barrier height between Pt and Ba₀.₆Sr₀.₄TiO₃ leading to an increased leakage current density and, thus, to a severe degradation of the varactor performance. |
| Status: | Publisher's Version |
| URN: | urn:nbn:de:tuda-tuprints-199287 |
| Classification DDC: | 500 Science and mathematics > 530 Physics |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology 11 Department of Materials and Earth Sciences > Material Science > Material Analytics 11 Department of Materials and Earth Sciences > Material Science > Surface Science |
| Date Deposited: | 17 Nov 2021 13:18 |
| Last Modified: | 02 Feb 2023 09:05 |
| URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/19928 |
| PPN: | 50421781X |
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