The research focus of the Heisenberg Group "Physics of Quantum Materials" is in the field of group IV semiconductors and their nanomaterials (mainly silicon and germanium). Based on fundamental research into nano and quantum effects, corresponding materials and nanostructures are experimentally realised and characterised, and their application to test components is investigated. The current core topic is research into novel doping possibilities for ultra-small nanoelectronic transistors through surface functionalisation and charge transfer effects. The influence of point defects and materials for surface functionalisation for high-efficiency silicon photovoltaics are also being researched.
Staff overview of the Chair of Physics of Quantum Materials
Notes: For four-digit telephone numbers, the area code for callers from outside the university network is +49 3731 39 - extension
| Name | Function | Address | Phone | |
|---|---|---|---|---|
| Prof. Dr Daniel Hiller | Heisenberg-Professor | Leipziger Straße 23, Room EG.27 | -2212 | daniel [dot] hiller [at] physik [dot] tu-freiberg [dot] de |
| Dr Ingmar Ratschinski | Scientific assistant | Leipziger Straße 23, Room EG.28 | -2731 | ingmar [dot] ratschinski [at] physik [dot] tu-freiberg [dot] de |
| Philipp Häussermann | Doctoral student | Leipziger Straße 23, Room KG.16 | -3005 | philipp [dot] haeussermann [at] physik [dot] tu-freiberg [dot] de |
| Somayeh Shams | Doctoral student | Leipziger Straße 23, Room EG.26 | -2779 | somayeh [dot] shams [at] physik [dot] tu-freiberg [dot] de |
| Katharina Klose | Doctoral student | Leipziger Straße 23, Room EG.26 | -2779 | Katharina [dot] Klose [at] student [dot] tu-freiberg [dot] de |
| Shail Shah | Doctoral student | Leipziger Straße 23, Room EG.26 | -2779 | Shail [dot] Shah [at] student [dot] tu-freiberg [dot] de |
| André Straßheim | Master Student | Andre [dot] Strassheim [at] student [dot] tu-freiberg [dot] de |
Projects
- Silicon Modulation Doping for Energy Efficient Micro- and Nanoelectronics, ESF National Innovation Doctorate, Shail Shah, 2025-2028
- Interface Defect Engineering of Passivating and Charge Carrier Selective Contacts for High Efficiency Silicon Solar Cells, ESF National Innovation Doctorate, Katharina Klose, 2024-2028
- Modulation Doping of Silicon Quantum Dots, DAAD exchange project (PPP) with University of Alberta, Canada, 2024-2025
- Modulation Acceptor Doping of SiO2 as a Novel Doping Method for Silicon Nanowires (MADSiNano), DFG grant, 2022-2025
gepris/projekt/456993281 - Rapid thermal processing for the doping of nano and quantum structures incl. glovebox. Glovebox, SMWK investment focus, 2021-2022
- Alternative methods for doping and interface defect engineering of silicon and silicon nanostructures for photovoltaic and nanoelectronic applications, DFG Heisenberg Programme, 2021-2026
gepris/projekt/434030435
Further reading
S. Nagarajan, I. Ratschinski, S. Schmult, S. Wirth, D. König, T. Mikolajick, D. Hiller, and J. Trommer, "Analysing Carrier Density and Hall Mobility in Impurity-Free Silicon Virtually Doped by External Defect Placement", Adv. Funct. Mater. 2415230 (2024)
DOI: 10.1002/adfm.202415230
I. Ratschinski, S. Nagarajan, J. Trommer, A. Luferau, M. Bilal Khan, A. Erbe, Y. M. Georgiev, T. Mikolajick, S. C. Smith, D. König, D. Hiller, "Significant Resistance Reduction in Modulation-Doped Silicon Nanowires via Aluminum-Induced Acceptor States in SiO2", Phys. Status Solidi A 220, 2300068 (2023)
DOI: 10.1002/pssa.202300068
D. Hiller, P. Hönicke, D. König, "Material combination of Tunnel-SiO2 with a (sub-)Monolayer of ALD-AlOx on silicon offering a highly passivating hole selective contact", Sol. Energy Mater. Sol. Cells 215, 110654 (2020)
DOI: 10.1016/j.solmat.2020.110654
D. Hiller, J. Göttlicher, R. Steininger, T. Huthwelker, J. Julin, F. Munnik, M. Wahl, W. Bock, B. Schoenaers, A. Stesmans, D. König, "Structural Properties of Al-O Monolayers in SiO2 on Silicon and the Maximisation of Their Negative Fixed Charge Density", ACS Appl. Mater. Interfaces 10, 30495 (2018)
DOI: 10.1021/acsami.8b06098
D. König, D. Hiller, S. Gutsch, M. Zacharias, S. Smith, "Modulation Doping of Silicon using Aluminium-induced Acceptor States in Silicon Dioxide", Sci. Rep. 7, 46703 (2017)
DOI: 10.1038/srep46703
Former employees
- Yuanzhi Liu, Master student, 2024
- Sally Heidenreich, Bachelor student, 2024
- Anamika Anand, Master student, 2024
- Sourabh Seth, Master student, 2024
- Selina Schneider, Bachelor student and Hiwi, 2023/24
- Sathvik Peddamalla, Master student, 2022
- Maryam Rezvani Amin, Hiwi, 2022
- Keval Manishbhai Kalathiya, Hiwi and Master student, 2021 - 2024