Li, Shunyi ; Wachau, André ; Schafranek, Robert ; Klein, Andreas ; Zheng, Yuliang ; Jakoby, Rolf (2021)
Energy level alignment and electrical properties of (Ba,Sr)TiO₃/Al₂O₃ interfaces for tunable capacitors.
In: Journal of Applied Physics, 2010, 108 (1)
doi: 10.26083/tuprints-00019919
Article, Secondary publication, Publisher's Version
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| Item Type: | Article |
|---|---|
| Type of entry: | Secondary publication |
| Title: | Energy level alignment and electrical properties of (Ba,Sr)TiO₃/Al₂O₃ interfaces for tunable capacitors |
| Language: | English |
| Date: | 2021 |
| Place of Publication: | Darmstadt |
| Year of primary publication: | 2010 |
| Publisher: | AIP Publishing |
| Journal or Publication Title: | Journal of Applied Physics |
| Volume of the journal: | 108 |
| Issue Number: | 1 |
| Collation: | 5 Seiten |
| DOI: | 10.26083/tuprints-00019919 |
| Corresponding Links: | |
| Origin: | Secondary publication service |
| Abstract: | The interface formation between Ba₀.₆Sr₀.₄TiO₃ and Al₂O₃ has been studied using photoelectron spectroscopy with in situ sample preparation. A negligible valence band discontinuity, corresponding to a ∼5.6 eV barrier for electron transport at the BST/Al₂O₃ interface is determined. Current-voltage measurements show that the leakage current can be significantly reduced by inserting the Al₂O₃ barrier layer between barium strontium titanate (BST) and Pt electrode. Different charge injection behavior depending on Al₂O₃ thickness is observed, which correspond well with the experimentally determined energy band diagrams. Direct tunneling from the metal electrode into the BST conduction band through the Al₂O₃ barrier layer is observed. |
| Status: | Publisher's Version |
| URN: | urn:nbn:de:tuda-tuprints-199191 |
| Classification DDC: | 500 Science and mathematics > 530 Physics |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Surface Science 18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics (IMP) > Microwave Engineering DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties > Subproject D3: Function and fatigue of oxide electrodes in organic light emitting diodes |
| Date Deposited: | 16 Nov 2021 12:37 |
| Last Modified: | 26 Jan 2023 08:29 |
| URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/19919 |
| PPN: | 504066455 |
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