Li, Shunyi ; Chen, Feng ; Schafranek, Robert ; Bayer, Thorsten J. M. ; Rachut, Karsten ; Fuchs, Anne ; Siol, Sebastian ; Weidner, Mirko ; Hohmann, Mareike ; Pfeifer, Verena ; Morasch, Jan ; Ghinea, Cosmina ; Arveux, Emmanuel ; Günzler, Richard ; Gassmann, Jürgen ; Körber, Christoph ; Gassenbauer, Yvonne ; Säuberlich, Frank ; Rao, Gutlapalli Venkata ; Payan, Sandrine ; Maglione, Mario ; Chirila, Cristina ; Pintilie, Lucian ; Jia, Lichao ; Ellmer, Klaus ; Naderer, Michael ; Reichmann, Klaus ; Böttger, Ulrich ; Schmelzer, Sebastian ; Frunza, Raluca C. ; Uršič, Hana ; Malič, Barbara ; Wu, Wen-Bin ; Erhart, Paul ; Klein, Andreas (2014):
Intrinsic energy band alignment of functional oxides.
In: physica status solidi (RRL) - Rapid Research Letters, 8 (6), pp. 571-576. ISSN 18626254,
[Article]
Abstract
The energy band alignment at interfaces between different materials is a key factor, which determines the function of electronic devices. While the energy band alignment of conventional semiconductors is quite well understood, systematic experimental studies on oxides are still missing. This work presents an extensive study on the intrinsic energy band alignment of a wide range of functional oxides using photoelectron spectroscopy with in-situ sample preparation. The studied materials have particular technological importance in diverse fields as solar cells, piezotronics, multiferroics, photo-electrochemistry and oxide electronics. Particular efforts have been made to verify the validity of transitivity, in order to confirm the intrinsic nature of the obtained band alignment and to understand the underlying principles. Valence band offsets up to 1.6 eV are observed. The large variation of valence band maximum energy can be explained by the different orbital contributions to the density of states in the valence band. The framework provided by this work enables the general understanding and prediction of energy band alignment at oxide interfaces, and furthermore the tailoring of energy level matching for charge transfer in functional oxides. (© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
| Item Type: | Article |
|---|---|
| Erschienen: | 2014 |
| Creators: | Li, Shunyi ; Chen, Feng ; Schafranek, Robert ; Bayer, Thorsten J. M. ; Rachut, Karsten ; Fuchs, Anne ; Siol, Sebastian ; Weidner, Mirko ; Hohmann, Mareike ; Pfeifer, Verena ; Morasch, Jan ; Ghinea, Cosmina ; Arveux, Emmanuel ; Günzler, Richard ; Gassmann, Jürgen ; Körber, Christoph ; Gassenbauer, Yvonne ; Säuberlich, Frank ; Rao, Gutlapalli Venkata ; Payan, Sandrine ; Maglione, Mario ; Chirila, Cristina ; Pintilie, Lucian ; Jia, Lichao ; Ellmer, Klaus ; Naderer, Michael ; Reichmann, Klaus ; Böttger, Ulrich ; Schmelzer, Sebastian ; Frunza, Raluca C. ; Uršič, Hana ; Malič, Barbara ; Wu, Wen-Bin ; Erhart, Paul ; Klein, Andreas |
| Title: | Intrinsic energy band alignment of functional oxides |
| Language: | English |
| Abstract: | The energy band alignment at interfaces between different materials is a key factor, which determines the function of electronic devices. While the energy band alignment of conventional semiconductors is quite well understood, systematic experimental studies on oxides are still missing. This work presents an extensive study on the intrinsic energy band alignment of a wide range of functional oxides using photoelectron spectroscopy with in-situ sample preparation. The studied materials have particular technological importance in diverse fields as solar cells, piezotronics, multiferroics, photo-electrochemistry and oxide electronics. Particular efforts have been made to verify the validity of transitivity, in order to confirm the intrinsic nature of the obtained band alignment and to understand the underlying principles. Valence band offsets up to 1.6 eV are observed. The large variation of valence band maximum energy can be explained by the different orbital contributions to the density of states in the valence band. The framework provided by this work enables the general understanding and prediction of energy band alignment at oxide interfaces, and furthermore the tailoring of energy level matching for charge transfer in functional oxides. (© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) |
| Journal or Publication Title: | physica status solidi (RRL) - Rapid Research Letters |
| Volume of the journal: | 8 |
| Issue Number: | 6 |
| Uncontrolled Keywords: | energy band alignment; functional oxides; transitivity; electronic structure; photoelectron spectroscopy |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Surface Science Zentrale Einrichtungen DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation > Subproject B7: Polarisation and charging in electrical fatigue ferroelectrics 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres DFG-Collaborative Research Centres (incl. Transregio) |
| Date Deposited: | 15 Dec 2014 09:31 |
| URL / URN: | http://dx.doi.org/10.1002/pssr.201409034 |
| Additional Information: | SFB 595 B7 |
| Identification Number: | doi:10.1002/pssr.201409034 |
| PPN: | |
| Funders: | German Science Foundation (DFG) within the collaborative research center SFB 595 (Electrical Fatigue of Functional Materials), Research Training Group (GRK 1037) TICMO (Tunable Integrated Components for Microwaves and Optics), state of Hessen within the LOEWE center AdRIA (Adaptronik-Research, Innovation, Application), Slovenian Research Agency (Project P2-0105, 1000-10-310134 and J2-4173), Romanian Ministry of National Education-UEFISCDI (Project PN-II-ID-PCCE-2011-2-0006, contract no. 3/2012). |
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