torunkj

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Academic interests

I am working on advanced materials for renewable energy. The materials are mostly semiconducting, and I am particular exploring how the properties change when the dimensions are reduced dramatically, all the way down to the nanoscale. 

Background

I graduated from the University of Oslo in 2012 with a master in "Materials, Energy and Nanotechnology". During my master thesis I worked on thermoelectric oxides, more precisely La0,7Sr0,3CoO(3-delta) (0 < delta < 0,15), and I investigated how the nanostructure of the oxide affected the thermoelectrical properties. 

After my studies I explored the "real world", and worked as a consultant for two years. I got to know a lot of exiting Norwegian companies within many different industries. Despite two very interesting years, I missed researching how and why things are the way they are. This led me back to the university, and I hope that my work will take us one step closer to cheaper and more efficient solar cells. 
 

Teaching

Spring 2016: FYS3320 - Fysikk og energiressurser

Autumn 2016: ENERGI4010 - Sustainable energy resources

Autumn 2017: ENERGI4010 - Sustainable energy resources

Partners

My project, Nanosol is a collaboration between SINTEF Materials and Chemistry and the University of Oslo.

Tags: Atomic Layer Deposition, SMN, Semiconductors, Solar cells, LENS, Silicon

Publications

  • Dörenkämper, Maarten; Jong, Minne M. de; Kroon, Jan; Nysted, Vilde Stueland; Selj, Josefine & Kjeldstad, Torunn (2023). Modeled and Measured Operating Temperatures of Floating PV Modules: A Comparison. Energies. ISSN 1996-1073. 16(20). doi: 10.3390/en16207153. Full text in Research Archive
  • Thøgersen, Annett; Jensen, Ingvild Julie Thue; Belle, Branson Delano; Stange, Marit Synnøve Sæverud; Reinertsen, Vilde Mari & Kjeldstad, Torunn [Show all 9 contributors for this article] (2022). Plasmonic properties of aluminium nanowires in amorphous silicon. Journal of Physics: Condensed Matter. ISSN 0953-8984. 35(6), p. 1–10. doi: 10.1088/1361-648X/aca30e. Full text in Research Archive
  • Kjeldstad, Torunn; Nysted, Vilde Stueland; Kumar, Manish; Oliviera-Pinto, Sara; Otnes, Gaute & Lindholm, Dag [Show all 7 contributors for this article] (2022). The performance and amphibious operation potential of a new floating photovoltaic technology. Solar Energy. ISSN 0038-092X. 239, p. 242–251. doi: 10.1016/j.solener.2022.04.065. Full text in Research Archive
  • Lindholm, Dag; Selj, Josefine Helene Krogh; Kjeldstad, Torunn; Fjær, Hallvard Gustav & Nysted, Vilde Stueland (2022). CFD modelling to derive U-values for floating PV technologies with large water footprint. Solar Energy. ISSN 0038-092X. 238, p. 238–247. doi: 10.1016/j.solener.2022.04.028. Full text in Research Archive
  • Lindholm, Dag; Kjeldstad, Torunn; Selj, Josefine; Marstein, Erik Stensrud & Fjær, Hallvard Gustav (2021). Heat loss coefficients computed for floating PV modules. Progress in Photovoltaics. ISSN 1062-7995. 29(12), p. 1262–1273. doi: 10.1002/pip.3451.
  • Kjeldstad, Torunn; Lindholm, Dag; Marstein, Erik & Selj, Josefine (2021). Cooling of floating photovoltaics and the importance of water temperature. Solar Energy. ISSN 0038-092X. 218, p. 544–551. doi: 10.1016/j.solener.2021.03.022. Full text in Research Archive
  • Kjeldstad, Torunn; Thøgersen, Annett; Stange, Marit Synnøve Sæverud; Jensen, Ingvild Julie Thue; Nilsen, Ola & Galeckas, Augustinas [Show all 7 contributors for this article] (2020). Selective etching of nanostructured a-Si:Al and its effect on porosity, Al gradient and surface oxidation. Thin Solid Films. ISSN 0040-6090. 702. doi: 10.1016/j.tsf.2020.137982. Full text in Research Archive
  • Kjeldstad, Torunn; Thøgersen, Annett; Stange, Marit Synnøve Sæverud; Jensen, Ingvild Julie Thue; Monakhov, Eduard & Galeckas, Augustinas (2019). Surface effects and optical properties of self-assembled nanostructured a-Si:Al. Nanomaterials. ISSN 2079-4991. 9(8), p. 1–12. doi: 10.3390/nano9081106. Full text in Research Archive
  • Kjeldstad, Torunn; Thøgersen, Annett; Stange, Marit Synnøve Sæverud; Azarov, Alexander; Monakhov, Eduard & Galeckas, Augustinas (2019). Monitoring selective etching of self-assembled nanostructured a-Si:Al films. Nanotechnology. ISSN 0957-4484. 30(13), p. 1–5. doi: 10.1088/1361-6528/aafb86. Full text in Research Archive
  • Thøgersen, Annett; Jensen, Ingvild Julie Thue; Stange, Marit Synnøve Sæverud; Kjeldstad, Torunn; Martinez-Martinez, Diego & Løvvik, Ole Martin [Show all 8 contributors for this article] (2018). Formation of nanoporous Si upon self-organized growth of Al and Si nanostructures. Nanotechnology. ISSN 0957-4484. 29(31). doi: 10.1088/1361-6528/aac36a. Full text in Research Archive
  • Kjeldstad, Torunn; Thøgersen, Annett; Nilsen, Ola; Monakhov, Edouard & Galeckas, Augustinas (2017). Controllable template approach for ZnO nanowire growth. Physica Status Solidi (a) applications and materials science. ISSN 1862-6300. 214(2), p. 1–6. doi: 10.1002/pssa.201600480.

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  • Riise, Heine Nygard & Kjeldstad, Torunn (2024). Hvor mye sol har vi i Norge og hva gir det i kWh?
  • Honningdalsnes, Erlend Hustad; Riise, Heine Nygard; Kjeldstad, Torunn; Marstein, Erik Stensrud; Stokkan, Gaute & Randle-Boggis, Richard [Show all 10 contributors for this article] (2024). Fordeler med solkraftverk på jord- og skogbruksarealer. Bondebladet. ISSN 0332-8414.
  • Ulset, Marit Sandsaunet; Kjeldstad, Torunn; Nysted, Vilde Stueland; Lindholm, Dag & Selj, Josefine Helene Krogh (2023). Thermal losses for floating PV - Wind direction dependencies.
  • Nysted, Vilde Stueland; Kjeldstad, Torunn; Stieng, Lars Einar Sørensen; Otnes, Gaute & Selj, Josefine Helene Krogh (2023). Assessing the influence of wave motion on the performance of floating photovoltaic systems.
  • Kjeldstad, Torunn; Nysted, Vilde Stueland; Balciunaite, Rugile; Lindholm, Dag & Selj, Josefine Helene Krogh (2022). Floating solar technology in a tropical climate.
  • Kjeldstad, Torunn (2022). Fra flytende påstander til konkret kunnskap .
  • Lindholm, Dag; Nysted, Vilde Stueland; Selj, Josefine Helene Krogh & Kjeldstad, Torunn (2022). Thermal losses for floating PV - Energy yield assessment.
  • Kumar, Manish; Nysted, Vilde Stueland; Otnes, Gaute; Kjeldstad, Torunn; Roosloot, Nathan & Selj, Josefine Helene Krogh (2022). Impact of Water Waves on the Output Power of Floating PV Systems on Water Bodies.
  • Otnes, Gaute; Roosloot, Nathan; Kjeldstad, Torunn; Seiffert, Christoph & Selj, Josefine Helene Krogh (2022). Adapted stress testing for floating PV.
  • Kjeldstad, Torunn & Torkild, Jemterud (2022). Abels Tårn. [Radio]. NRK P2.
  • Nysted, Vilde Stueland; Kjeldstad, Torunn; Lindholm, Dag & Balciunaite, Rugile (2022). Investigation of module temperatures for a floating photovoltaic system.
  • Kjeldstad, Torunn (2021). Flytende solkraft- Et nytt norsk eventyr?
  • Kjeldstad, Torunn (2021). Er flytende solkraft den nye vin(d)en? . [Radio]. Energinorge.
  • Kjeldstad, Torunn (2021). Flytende solkraft. [Radio]. Abels tårn P1.
  • Kjeldstad, Torunn; Otnes, Gaute; Pinto, sara; Lindholm, Dag & Selj, Josefine (2021). Performance and amphibious operation of a small-footprint FVP system from Current Solar.
  • Kjeldstad, Torunn (2019). Abels Tårn. [Radio]. NRK P2.
  • Kjeldstad, Torunn (2019). Solar power – moving forward.
  • Kjeldstad, Torunn (2019). En fornybar fremtid med solenergi – muligheter og utfordringer.
  • Kjeldstad, Torunn (2019). Abels Tårn. [Radio]. NRK P2.
  • Kjeldstad, Torunn (2019). Science slam - Dikt om min forskning.
  • Kjeldstad, Torunn (2019). Forskernatt - Forskernes eget talkshow .
  • Jemterud, Torkild; Kjeldstad, Torunn; Antonsen, Roger & Bøckman, Petter (2019). Abels tårn. [Radio]. Ekko, NRK P2.
  • Delsett, Lene Liebe; Einevoll, Gaute; Kjeldstad, Torunn & Jemterud, Torkild (2018). Abels tårn 26. januar 2018. [Radio]. NRK P2 Ekko.
  • Kjeldstad, Torunn; Thøgersen, Annett; Galeckas, Augustinas; Monakhov, Eduard; Stange, Marit Synnøve Sæverud & Nilsen, Ola (2018). Aluminum nanowires in amorphous silicon.
  • Kjeldstad, Torunn (2018). Abels Tårn. [Radio]. NRK P2.
  • Kjeldstad, Torunn (2018). Abels Tårn. [Radio]. NRK P2.
  • Kjeldstad, Torunn (2018). Abels Tårn. [Radio]. NRK P2.
  • Kjeldstad, Torunn (2017). Når noe veldig lite kan bli til noe stort.
  • Kjeldstad, Torunn (2017). Når noe veldig lite kan bli til noe stort.
  • Kjeldstad, Torunn (2017). Solceller.
  • Kjeldstad, Torunn; Thøgersen, Annett; Stange, Marit Synnøve Sæverud; Galeckas, Augustinas & Monakhov, Edouard (2017). Self-assembled aluminium nanowires in silicon.
  • Kjeldstad, Torunn; Galeckas, Augustinas; Nilsen, Ola; Azarov, Alexander; Stange, Marit Synnøve Sæverud & Diplas, Spyridon [Show all 7 contributors for this article] (2017). Self-assembly of Al-nanowires in silicon.
  • Kjeldstad, Torunn; Thøgersen, Annett; Monakhov, Edouard & Galeckas, Augustinas (2017). Investigation of mesoporous aSi:H with embedded aluminium nanoparticles.
  • Kjeldstad, Torunn; Thøgersen, Annett; Monakhov, Edouard & Galeckas, Augustinas (2017). Aluminium nanoparticles embedded in mesoporous aSi:H.
  • Kjeldstad, Torunn (2017). Abels tårn. [Radio]. P2.
  • Riise, Heine Nygard; Aarseth, Bjørn Brevig; Kjeldstad, Torunn; Borgersen, Jon Arthur & Olsen, Vegard Skiftestad (2017). Besøk frå deltakarar i Fysikk-OL.
  • Riise, Heine Nygard; Kjeldstad, Torunn; Sky, Thomas Neset & Borgersen, Jon Arthur (2017). MiNaLab-besøk frå Kongsskogen VGS.
  • Thøgersen, Annett; Kjeldstad, Torunn; Jensen, Ingvild Julie Thue; Muntingh, Agnar Georg Peder; Stange, Marit Synnøve Sæverud & Ulyashin, Alexander [Show all 9 contributors for this article] (2017). Plasmonic properties of aluminium nanowires in amorphous silicon and inverted silicon nanowires.
  • Thøgersen, Annett; Kjeldstad, Torunn; Jensen, Ingvild Julie Thue; Stange, Marit Synnøve Sæverud; Ulyashin, Alexander & Galeckas, Augustinas [Show all 9 contributors for this article] (2017). Growing and characterizing self-organizing aluminium nanowires in amorphous silicon.
  • Haraldsen, Kirsten Borse; Rogne, Sissel; Eskeland, Ragnhild; Kjeldstad, Torunn; Olsbye, Unni & Røyne, Anja (2017). Panelsamtale: Hva nå? DAMER! 100 år med kvinner i realfagene ved UiO.
  • Kjeldstad, Torunn; Galeckas, Augustinas; Nilsen, Ola; Azarov, Alexander; Stange, Marit Synnøve Sæverud & Diplas, Spyridon [Show all 7 contributors for this article] (2016). A new silicon nanostructure.
  • Kjeldstad, Torunn; Galeckas, Augustinas; Monakhov, Edouard; Nilsen, Ola & Thøgersen, Annett (2016). Controllable template approach for ZnO nanowire growth.
  • Kjeldstad, Torunn (2020). Characterization and functionalization of self-assembled nanostructures. Det matematisk-naturvitenskapelige fakultet.

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Published Apr. 22, 2015 8:24 AM - Last modified Dec. 5, 2017 3:14 PM