chrisz
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Academic interests
I study electrically- and optically-active defects in semiconducting oxides (TiO2, ZnO, Ga2O3) using optical as well as electrical characterisation techniques (Photoluminescence spectroscopy, Impedance Spectroscopy, Deep-level transient Spectroscopy,...). Furthermore, I am involved in extending the experimental techniques available in our research group.
Background
2008 - 2015: Bachelor and Master Studies at the Karlsruhe Institute of Technology
Publications
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Langørgen, Amanda; Zimmermann, Christian; Frodason, Ymir Kalmann; Førdestrøm Verhoeven, Espen; Weiser, Philip Michael & Karsthof, Robert Michael [Show all 8 contributors for this article] (2022). Influence of heat treatments in H 2 and Ar on the E <inf>1</inf>center in β -Ga<inf>2</inf>O<inf>3</inf>. Journal of Applied Physics. ISSN 0021-8979. 131(11). doi: 10.1063/5.0083861.
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Bonkerud, Julie; Zimmermann, Christian; Weiser, Philip Michael; Vines, Lasse & Monakhov, Eduard (2021). On the permittivity of titanium dioxide. Scientific Reports. ISSN 2045-2322. 11. doi: 10.1038/s41598-021-92021-5. Full text in Research Archive
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Frodason, Ymir Kalmann; Zimmermann, Christian; Verhoeven, Espen Førdestrøm; Weiser, Philip Michael; Vines, Lasse & Varley, Joel B (2021). Multistability of isolated and hydrogenated Ga-O divacancies in beta-Ga2O3. PHYSICAL REVIEW MATERIALS. ISSN 2475-9953. 5. doi: 10.1103/PhysRevMaterials.5.025402. Full text in Research Archive
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Bonkerud, Julie; Zimmermann, Christian; Herklotz, Frank; Weiser, Philip Michael; Seiffert, Christoph & Verhoeven, Espen Førdestrøm [Show all 8 contributors for this article] (2020). Electrically-active defects in reduced and hydrogenated rutile TiO2. Semiconductor Science and Technology. ISSN 0268-1242. 36(1). doi: 10.1088/1361-6641/abc854. Full text in Research Archive
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Zimmermann, Christian; Frodason, Ymir Kalmann; Rønning, Vegard; Varley, Joel B & Vines, Lasse (2020). Combining steady-state photo-capacitance spectra with first-principles calculations: the case of Fe and Ti in β-Ga2O3. New Journal of Physics. ISSN 1367-2630. 22. doi: 10.1088/1367-2630/ab8e5b. Full text in Research Archive
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Zimmermann, Christian; Frodason, Ymir Kalmann; Barnard, Abraham Willem; Varley, Joel B; Irmscher, Klaus & Galazka, Zbigniew [Show all 10 contributors for this article] (2020). Ti- and Fe-related charge transition levels in beta-Ga2O3. Applied Physics Letters. ISSN 0003-6951. 116(7). doi: 10.1063/1.5139402. Full text in Research Archive
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Zimmermann, Christian; Rønning, Vegard; Frodason, Ymir Kalmann; Bobal, Viktor; Varley, Joel B & Vines, Lasse (2020). Primary intrinsic defects and their charge transition levels in beta-Ga2O3. PHYSICAL REVIEW MATERIALS. ISSN 2475-9953. 4(7). doi: 10.1103/PhysRevMaterials.4.074605. Full text in Research Archive
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Bonkerud, Julie; Zimmermann, Christian; Weiser, Philip Michael; Aarholt, Thomas; Verhoeven, Espen Førdestrøm & Vines, Lasse [Show all 8 contributors for this article] (2020). Fabrication and characterization of Schottky barrier diodes on rutile TiO2. Materials Research Express. ISSN 2053-1591. 7(6). doi: 10.1088/2053-1591/ab9777. Full text in Research Archive
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Zimmermann, Christian; Verhoeven, Espen Førdestrøm; Frodason, Ymir Kalmann; Weiser, Philip Michael; Varley, Joel B & Vines, Lasse (2020). Formation and control of the E2* center in implanted b-Ga2O3 by reverse-bias and zero-bias annealing. Journal of Physics D: Applied Physics. ISSN 0022-3727. 53(46). doi: 10.1088/1361-6463/aba64d. Full text in Research Archive
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Olsen, Vegard Skiftestad; Baldissera, Gustavo; Zimmermann, Christian; Granerød, Cecilie Skjold; Bazioti, Kalliopi & Galeckas, Augustinas [Show all 11 contributors for this article] (2019). Evidence of defect band mechanism responsible for band gap evolution in (ZnO)1−x(GaN)x alloys. Physical review B (PRB). ISSN 2469-9950. 100(16). doi: 10.1103/PhysRevB.100.165201. Full text in Research Archive
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Zimmermann, Christian; Bonkerud, Julie; Herklotz, Frank; Sky, Thomas Neset; Hupfer, Alexander & Monakhov, Eduard [Show all 8 contributors for this article] (2018). Influence of annealing atmosphere on formation of electrically-active defects in rutile TiO2. Journal of Applied Physics. ISSN 0021-8979. 123(16), p. 161572-1–161572-8. doi: 10.1063/1.5011136. Full text in Research Archive
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Lang, Mario; Zimmermann, Christian; Krämmer, Christoph; Renz, Tobias; Huber, Christian & Kalt, Heinz [Show all 7 contributors for this article] (2017). Luminescence properties of Cu2ZnSn(S,Se)4 solar cell absorbers: State filling versus screening of electrostatic potential fluctuations. Physical review B (PRB). ISSN 2469-9950. 95(15). doi: 10.1103/PhysRevB.95.155202.
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Zimmermann, Christian; Frodason, Ymir Kalmann; Varley, Joel Basile; Verhoeven, Espen Førdestrøm; Rønning, Vegard & Weiser, Philip Michael [Show all 15 contributors for this article] (2021). Identification of Fe-, Ti- and H-related Charge-state Transition Levels in β-Ga2O3.
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Frodason, Ymir Kalmann; Zimmermann, Christian; Verhoeven, Espen Førdestrøm; Weiser, Philip Michael; Vines, Lasse & Varley, Joel Basile (2021). Multistability of Ga-O divacancies in β-Ga2O3.
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Vines, Lasse; Ingebrigtsen, Mads Eide; Zimmermann, Christian; Rønning, Vegard & Kuznetsov, Andrej (2019). Electrically Active Defects in β-Ga2O3 .
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Grini, Sigbjørn; Borgersen, Jon Arthur; Sky, Thomas Neset; Frodason, Ymir Kalmann; Riise, Heine Nygard & Zimmermann, Christian (2018). Omvisning MENA.
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Lento, Jennifer; Goedkoop, Willem; Culp, Joseph M; Christoffersen, Kirsten Seestern; Larusson, Kari Fannar & Fefilova, Elena B. [Show all 26 contributors for this article] (2019). State of the Arctic Freshwater Biodiversity. Conservation of Arctic Flora and Fauna International Secretariat. ISSN 978-9935-431-77-6.
Published June 15, 2016 11:35 AM
- Last modified Jan. 31, 2018 12:39 AM