Mariann Carlsen Frøland

• Aßmann, Nicole; Hammann, Benjamin; Frøland, Mariann Carlsen; Kwapil, Wolfram & Monakhov, Eduard (2025). The differential impact of light soaking and dark annealing on hydrogen species during a LeTID cycle in boron-doped FZ silicon: A quantitative FT-IR study. Solar Energy Materials and Solar Cells. ISSN 0927-0248. 293. doi: 10.1016/j.solmat.2025.113853. Full text in Research Archive Show summary

  Hydrogen is recognized as the key species responsible for light- and elevated- temperature-induced degradation (LeTID) in silicon. The simplest hydrogen species detectable is acceptor-hydrogen, HB in boron-doped material. Many studies track HB trough resistivity measurements and infer the evolution of the hydrogen molecule, H2, often excluding other potentially relevant hydrogen-related species from consideration. This study presents a Fourier transform-infrared analysis of the evolution of the hydrogen species, HB, H2, the hydrogen dimer , and the vacancy-hydrogen complexes VH4 and V2H6, during dark annealing and light soaking. The findings are compared to changes in lifetime-equivalent defect density observed over a LeTID cycle. Before solar cell processing the hydrogen species found are HB, H2, V2H6, and VH4. After processing, is formed, HB and H2 increase in concentration, while VH4 and V2H6 disappear. Light soaking at 75 °C and 1 sun-equivalent and dark annealing at 175 °C both reduce H2 and concentrations, while HB concentration increases with dark annealing but decreases during light soaking. Extended dark annealing results in a re-appearance of VH4. A considerable role of and VH4 in the hydrogen balance in a LeTID cycle is demonstrated. Finally, several unidentified peaks are observed in the wavenumber range of 3000cm−1 to 3300cm−1, showing sensitivity to different treatment conditions. Specifically, peaks at 3029.1cm−1, 3102.1cm−1, and 3238.9cm−1 grow only when light soaking took place as final step. Conversely, a peak at 3025.8cm−1 increases under dark annealing conditions and decreases with prolonged light soaking

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• Häfliger, Philipp; Frøland, Mariann Carlsen & Stokke, Anne-Marie Korseberg (2026). Coffee & Chips - PhotoSense: Testing a biomolecular eye implant (UiO). doi: https:/www.forskningsparken.no/event/coffee-chips-fridays. Full text in Research Archive
• Rongve, Anna Stray; Frøland, Mariann Carlsen & Stokke, Anne-Marie Korseberg (2026). Coffee & Chips - sensiBel - breaking the sound barrier with studio‑quality optical MEMS microphones (sensiBel). doi: https:/www.forskningsparken.no/event/coffee-chips-fridays. Full text in Research Archive
• Halvorsen, Marius Mæhlum; Frøland, Mariann Carlsen & Stokke, Anne-Marie Korseberg (2026). Coffee & Chips - Silicon Radiation Sensors at SINTEF (SINTEF). doi: https:/www.forskningsparken.no/event/coffee-chip-march-26. Full text in Research Archive
• Grepstad, Jon Olav; Frøland, Mariann Carlsen & Stokke, Anne-Marie Korseberg (2026). Coffee & Chips - Norwegian MEMS Enabling Next-Generation Gas Analysis (Tunable). doi: https:/www.forskningsparken.no/event/coffee-chip-april-26. Full text in Research Archive
• Vines, Lasse; Frøland, Mariann Carlsen & Stokke, Anne-Marie Korseberg (2026). Coffee & Chips - Quantum technology initiatives in Norway and the center for Defects in Semiconductors for Quantum Sensing (UiO). doi: https:/www.forskningsparken.no/event/coffee-chip-may-26. Full text in Research Archive
• Hoel, Robin; Frøland, Mariann Carlsen & Stokke, Anne-Marie Korseberg (2026). Coffee & Chips - Low Power WMCU Design - The hairy edge: striking a balance between low-power, performance and cost (Texas Instruments). doi: https:/www.forskningsparken.no/event/coffee-chips-fridays. Full text in Research Archive
• Mikkelsen, Sindre; Frøland, Mariann Carlsen & Stokke, Anne-Marie Korseberg (2026). Coffee & Chips - Image sensors for automotive applications (Sony). doi: https:/www.forskningsparken.no/event/coffee-chips-fridays. Full text in Research Archive
• Frøland, Mariann Carlsen; Furlan, Riccardo; Bygdås, Martin; Olsen, Vegard Standeren; Bathen, Marianne Etzelmüller & Vines, Lasse (2026). Sputtered Aluminum Nitride Thin Films as Waveguides and Hosts for Single-Photon Emitters. Full text in Research Archive Show summary

  AlN is a promising material for hosting quantum emitters and for use as optical waveguides. This work investigates the emission and structural properties of sputtered aluminium nitride thin films, with the aim of integrating these films into a quantum sensor.

• Bygdås, Martin; Zalandauskas, Vytautas; Frøland, Mariann Carlsen; Farsund, Øystein; Vines, Lasse & Bathen, Marianne Etzelmüller (2026). Intrinsic defects in AlN for single-photon emission and spin manipulation. Full text in Research Archive Show summary

  AlN is a promising host for quantum emitters, with an ultra-wide band gap, piezoelectric properties and widely used in industry. Recent reports indicate the presence of single-photon emitters (SPEs) in AlN [1,2], but the responsible defects are unidentified. This work aims to contribute towards such an identification by modelling intrinsic defects in AlN and their magneto-optical properties using density functional theory (DFT).

• Dahl, Tobias Gulden; Ramberg, Thomas; Frøland, Mariann Carlsen & Stokke, Anne-Marie Korseberg (2025). Coffee & Chips - Wireless optical charging of E-ink displays with MEMS micromirrors (Dory & SINTEF). Full text in Research Archive

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