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• Øgaard, Mari; Nysted, Vilde Stueland; Rønneberg, Sigrid; Otnes, Gaute; Foss, Sean Erik & Mongstad, Trygve [Show all 7 contributors for this article] (2024). Vertical bifacial PV systems: irradiance modeling and performance analysis of a lightweight system for flat roofs. EPJ Photovoltaics. ISSN 2105-0716. 15. doi: 10.1051/epjpv/2024012. Full text in Research Archive
• Honningdalsnes, Erlend Hustad; Bonesmo, Helge; Marstein, Erik Stensrud; Völler, Steve & Riise, Heine Nygard (2023). Autonomous Optimization of Agrivoltaic Systems With Vertical Bifacial PV Panels and the Grass Crop Timothy. EU PVSEC 2023. doi: 10.4229/EUPVSEC2023/4BV.3.13.
• Mussard, Maxime; Riise, Heine Nygard; Wiig, Marie Syre; Rønneberg, Sigrid & Foss, Sean Erik (2023). Influence of Temperature Coefficient and Sensor Choice on PV System Performance. IEEE Journal of Photovoltaics. ISSN 2156-3381. 13(6), p. 920–928. doi: 10.1109/JPHOTOV.2023.3311896.
• Klyve, Øyvind Sommer; Nygård, Magnus Moe; Riise, Heine Nygard; Fagerström, Jonathan & Marstein, Erik Stensrud (2023). The value of forecasts for PV power plants operating in the past, present and future Scandinavian energy markets. Solar Energy. ISSN 0038-092X. 255, p. 208–221. doi: 10.1016/j.solener.2023.03.044. Full text in Research Archive
• Martinsen, Dina C.; Øgaard, Mari; Nygård, Magnus Moe; Wiig, Marie Syre; Di Sabatino, Marisa & Marstein, Erik Stensrud [Show all 7 contributors for this article] (2022). Evaluation of Irradiance Decomposition and Transposition Models for a Nordic Climate. Proceedings of the European Photovoltaic Solar Energy Conference. ISSN 2196-100X. doi: 10.4229/WCPEC-82022-4BV.4.22.
• Øgaard, Mari; Frimannslund, Iver; Riise, Heine Nygard & Selj, Josefine Helene Krogh (2022). Snow Loss Modeling for Roof Mounted Photovoltaic Systems: Improving the Marion Snow Loss Model. IEEE Journal of Photovoltaics. ISSN 2156-3381. 12(4), p. 1005–1013. doi: 10.1109/JPHOTOV.2022.3166909. Full text in Research Archive
• Riise, Heine Nygard; Øgaard, Mari & Nærland, Tine Uberg (2021). Soiling impact on a farmhouse, rooftop PV system in Eastern Norway. Proceedings of the European Photovoltaic Solar Energy Conference. ISSN 2196-100X. p. 1081–1087. doi: 10.4229/EUPVSEC20212021-5DO.4.5.
• Øgaard, Mari; Riise, Heine Nygard & Selj, Josefine Helene Krogh (2021). Estimation of snow loss for photovoltaic plants in Norway. Proceedings of the European Photovoltaic Solar Energy Conference. ISSN 2196-100X. Full text in Research Archive
• Riise, Heine Nygard; Øgaard, Mari; Zhu, Junjie; You, Chang Chuan; Andersson, Fredrik & Bønsnæs, Tommy [Show all 8 contributors for this article] (2021). Performance analysis of a BAPV bifacial system in Norway. In Angus, Rockett (Eds.), 2021 IEEE 48th Photovoltaic Specialists Conference (PVSC). IEEE conference proceedings. ISSN 978-1-6654-1922-2. p. 1304–1308. doi: 10.1109/PVSC43889.2021.9518963.
• Øgaard, Mari; Riise, Heine Nygard & Selj, Josefine Helene Krogh (2021). Modeling Snow Losses in Photovoltaic Systems. Conference record of the Photovoltaic Specialists Conference. ISSN 0160-8371. doi: 10.1109/PVSC43889.2021.9518886. Full text in Research Archive
• Øgaard, Mari Benedikte; Aarseth, Bjørn Lupton; Skomedal, Åsmund; Riise, Heine Nygard; Sartori, Sabrina & Selj, Josefine Helene Krogh (2021). Identifying snow in photovoltaic monitoring data for improved snow loss modeling and snow detection. Solar Energy. ISSN 0038-092X. 223, p. 238–247. doi: 10.1016/j.solener.2021.05.023. Full text in Research Archive
• Kumar, Raj; Bergum, Kristin; Riise, Heine Nygard; Monakhov, Eduard; Galeckas, Augustinas & Svensson, Bengt Gunnar (2020). Impact of post annealing and hydrogen implantation on functional properties of Cu2O thin films for photovoltaic applications. Journal of Alloys and Compounds. ISSN 0925-8388. 825(5), p. 1–8. doi: 10.1016/j.jallcom.2020.153982. Full text in Research Archive
• Øgaard, Mari B.; Riise, Heine Nygard; Haug, Halvard; Sartori, Sabrina & Selj, Josefine H. (2020). Photovoltaic system monitoring for high latitude locations. Solar Energy. ISSN 0038-092X. 207, p. 1045–1054. doi: 10.1016/j.solener.2020.07.043. Full text in Research Archive
• Sky, Thomas Neset; Johansen, Klaus Magnus H; Frodason, Ymir Kalmann; Aarholt, Thomas; Riise, Heine Nygard & Prytz, Øystein [Show all 8 contributors for this article] (2019). Diffusion of indium in single crystal zinc oxide: a comparison between group III donors. Semiconductor Science and Technology. ISSN 0268-1242. 34(2), p. 1–6. doi: 10.1088/1361-6641/aafa4c. Full text in Research Archive
• Bergum, Kristin; Riise, Heine Nygard; Gorantla, Sandeep Madhukar; Lindberg, Per; Jensen, Ingvild Julie Thue & Gunnæs, Anette Eleonora [Show all 10 contributors for this article] (2018). Improving carrier transport in Cu2O thin films by rapid thermal annealing. Journal of Physics: Condensed Matter. ISSN 0953-8984. 30(7). doi: 10.1088/1361-648X/aaa5f4.
• Sky, Thomas Neset; Johansen, Klaus Magnus H; Riise, Heine Nygard; Svensson, Bengt Gunnar & Vines, Lasse (2018). Gallium diffusion in zinc oxide via the paired dopant-vacancy mechanism. Journal of Applied Physics. ISSN 0021-8979. 123(5). doi: 10.1063/1.5000123. Full text in Research Archive
• Schifano, Ramon; Riise, Heine Nygard; Domagala, J.; Azarov, Alexander; Ratajczak, R. & Monakhov, Edouard [Show all 11 contributors for this article] (2017). Comparison of the structural properties of Zn-face and O-face single crystal homoepitaxial ZnO epilayers grown by RF-magnetron sputtering. Journal of Applied Physics. ISSN 0021-8979. 121(1). doi: 10.1063/1.4973342. Full text in Research Archive
• Bergum, Kristin; Riise, Heine Nygard; Gorantla, Sandeep Madhukar; Monakhov, Edouard & Svensson, Bengt Gunnar (2016). Thin film Cu2O for solar cell applications. Conference record of the Photovoltaic Specialists Conference. ISSN 0160-8371. 2016-November, p. 2770–2773. doi: 10.1109/PVSC.2016.7750156.
• Lindberg, Per Filip; Riise, Heine Nygard; Bergum, Kristin; Svensson, Bengt Gunnar & Monakhov, Edouard (2016). Electronic properties of Au/Cu2O/n-type Si heterojunction for energy conversion. Conference record of the Photovoltaic Specialists Conference. ISSN 0160-8371. 2016-November, p. 2807–2810. doi: 10.1109/PVSC.2016.7750164.
• Gan, Jiantuo; Gorantla, Sandeep Madhukar; Riise, Heine Nygard; Fjellvåg, Øystein Slagtern; Diplas, Spyridon & Løvvik, Ole Martin [Show all 9 contributors for this article] (2016). Structural properties of Cu2O epitaxial films grown on c-axis single crystal ZnO by magnetron sputtering. Applied Physics Letters. ISSN 0003-6951. 108:152110(15), p. 1–5. doi: 10.1063/1.4945985. Show summary

  Epitaxial Cu2O films grown by reactive and ceramic radio frequency magnetron sputtering on single crystalline ZnO (0001) substrates are investigated. The films are grown on both O- and Zn-polar surface of the ZnO substrates. The Cu2O films exhibit a columnar growth manner apart from a ∼5 nm thick CuO interfacial layer. In comparison to the reactively sputtered Cu2O, the ceramic-sputtered films are less strained and appear to contain nanovoids. Irrespective of polarity, the Cu2O grown by reactive sputtering is observed to have (111)Cu2O||(0001)ZnO epitaxial relationship, but in the case of ceramic sputtering the films are found to show additional (110)Cu2O reflections when grown on O-polar surface. The observed CuO interfacial layer can be detrimental for the performance of Cu2O/ZnO heterojunction solar cells reported in the literature.

• Lindberg, Per Filip; Lipp Bregolin, Felipe; Wiesenhütter, Katarzyna; Wiesenhütter, Ulrich; Riise, Heine Nygard & Vines, Lasse [Show all 10 contributors for this article] (2016). The effect of millisecond flash lamp annealing on electrical and structural properties of ZnO:Al/Si structures. Journal of Applied Physics. ISSN 0021-8979. 119(18). doi: 10.1063/1.4948666. Full text in Research Archive Show summary

  The effect of millisecond flash lamp annealing (FLA) on aluminumdopedZnO (AZO) films and their interface with Si have been studied. The AZO films were deposited by magnetron sputtering on Si (100) substrates. The electrical and structural properties of the film and AZO/Si structures were characterized by current–voltage, capacitance–voltage, and deep level transient spectroscopy measurements, X-ray diffraction, and secondary ion mass spectrometry. The resistivity of the AZO film is reduced to a close to state-of-the-art value of 2 × 10−4 Ω cm after FLA for 3 ms with an average energy density of 29 J/cm2. In addition, most of the interfacial defects energy levels are simultaneously annealed out, except for one persisting shallow level, tentatively assigned to the vacancy-oxygen complex in Si, which was not affected by FLA. Subsequent to the FLA, the samples were treated in N2 or forming gas (FG) (N2/H2, 90/10%mole) ambient at 200–500 °C. The latter samples maintained the low resistivity achieved after the FLA, but not the former ones. The interfacial defect level persisting after the FLA is removed by the FG treatment, concurrently as another level emerges at ∼0.18 eV below the conduction band. The electrical data of the AZO films are discussed in term of point defects controlling the resistivity, and it is argued that the FLA promotes formation of electrically neutral clusters of Zink vacancies (VZn's) rather than passivating/compensating complexes between the Al donors and VZn's.

• Riise, Heine Nygard; Olsen, Vegard Skiftestad; Azarov, Alexander; Galeckas, Augustinas; Sky, Thomas Neset & Svensson, Bengt Gunnar [Show all 7 contributors for this article] (2016). Local homoepitaxy of zinc oxide thin films by magnetron sputtering. Thin Solid Films. ISSN 0040-6090. 601, p. 18–21. doi: 10.1016/j.tsf.2015.09.043.
• Riise, Heine Nygard; Schumann, Thomas; Azarov, Alexander; Hübner, Renè; Skorupa, Wolfgang & Svensson, Bengt Gunnar [Show all 7 contributors for this article] (2015). Formation of Shallow Boron Emitters in Crystalline Silicon Using Flash Lamp Annealing: Role of Excess Silicon Interstitials. Applied Physics Letters. ISSN 0003-6951. 107(2). doi: 10.1063/1.4926661.

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• Eriksen, Erling Ween; Nygård, Magnus Moe & Riise, Heine Nygard (2024). Minute-scale forecasting using skycameras: Feature Extraction at high latitudes.
• Riise, Heine Nygard; Honningdalsnes, Erlend Hustad; Hagen, Dagmar; Sydenham, Markus A. K.; Melhoop, Anne Catriona & Simensen, Trond Aalvik [Show all 8 contributors for this article] (2024). Envisol – Presenting a Cross-Disciplinary Project on How PV Power Plants Influence Nature.
• Kjeldstad, Torunn; Riise, Heine Nygard; Hagen, Dagmar & Rizzi, Jonathan (2024). Slik kan solkraft-utbyggerne lære av konfliktene med vindkraft på land. Teknisk Ukeblad. ISSN 0040-2354.
• Milani, Simone; Marstein, Erik Stensrud; Honningdalsnes, Erlend Hustad & Riise, Heine Nygard (2024). Water Reduction Potential for Olive Orchards within AgriPV Systems in Southern Italy.
• Honningdalsnes, Erlend Hustad; Marstein, Erik Stensrud & Riise, Heine Nygard (2024). Microclimatic Changes in Norwegian Solar Power Systems.
• Øgaard, Mari & Riise, Heine Nygard (2024). Simulering i Norge - Datagrunnlag og modeller.
• Riise, Heine Nygard (2024). Dårlige estimater kan velte et solcelleprosjekt. Montel.
• Riise, Heine Nygard; Myhre, Stine Fleischer; Øgaard, Mari & Berge, Erik (2024). Solenergi i norske forhold.
• Riise, Heine Nygard (2024). Benchmark of six irradiation products in Norway.
• 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.
• Klyve, Øyvind Sommer; Nygård, Magnus Moe; Riise, Heine Nygard; Fagerström, Jonathan & Marstein, Erik Stensrud (2023). What is the economic value of solar power forecasts in energy markets? - Scandinavian case study.
• Honningdalsnes, Erlend Hustad; Marstein, Erik Stensrud & Riise, Heine Nygard (2023). The Effect of PV Panels on Microclimatic Growth Conditions and Crop Yield in Agrivoltaic Systems.
• Honningdalsnes, Erlend Hustad; Bonesmo, Helge; Marstein, Erik Stensrud; Völler, Steve & Riise, Heine Nygard (2023). Autonomous Optimization of Agrivoltaic Systems - A Case Study on Grass and Vertical Bifacial PV.
• Øgaard, Mari; Rønneberg, Sigrid; Eriksen, Erling Ween; Nysted, Vilde Stueland; Otnes, Gaute & Foss, Sean Erik [Show all 8 contributors for this article] (2023). Vertical bifacial PV systems: modeling and performance analysis of a light-weight system for flat roofs.
• Myhre, Stine Fleischer; Kvalbein, Lisa; Øgaard, Mari & Riise, Heine Nygard (2023). Technical potential for PV power from Norwegian rooftops.
• Øgaard, Mari & Riise, Heine Nygard (2023). How large snow losses do we expect in ground mounted PV power plants in Norway?
• Dobler, Andreas; Berge, Erik & Riise, Heine Nygard (2022). Toward five years of quality assured global irradiance data for solar resource mapping in Norway. .
• Nygård, Magnus Moe; Klyve, Øyvind Sommer; Riise, Heine Nygard; Fagerström, Jonathan; Selj, Josefine Helene Krogh & Marstein, Erik Stensrud (2022). The value of PV forecasts in the current and future Scandinavian energy market.
• Martinsen, Dina C.; Øgaard, Mari; Nygård, Magnus Moe; Wiig, Marie Syre; Sabatino, Marisa Di & Marstein, Erik Stensrud [Show all 7 contributors for this article] (2022). Evaluation of irradiance decomposition and transposition models for a Nordic climate.
• Øgaard, Mari & Riise, Heine Nygard (2022). How should monthly snow loss be included in PV yield assessments?
• Foss, Sean Erik; Zhu, Junjie; Riise, Heine Nygard; Young, Jørgen & Borrebak, Per-Olof Fredrik Andersson (2022). BIPV development at IsolaSolar.
• Nygård, Magnus Moe; Wiig, Marie Syre; Otnes, Gaute; Roosloot, Nathan Abel; Riise, Heine Nygard & Øgaard, Mari [Show all 7 contributors for this article] (2021). Bifacial Gain In Nordic Conditions.
• Seiffert, Christoph; Riise, Heine Nygard; Roosloot, Nathan; Brattheim, Sigurd; Nærland, Tine Uberg & Otnes, Gaute (2021). Outdoor and Indoor PV Module Testing and Characterisation Facilities at IFE.
• Riise, Heine Nygard; Øgaard, Mari & Nærland, Tine Uberg (2021). Soiling impact on a farmhouse, rooftop PV system in Eastern Norway.
• Øgaard, Mari; Riise, Heine Nygard & Selj, Josefine Helene Krogh (2021). PV snow losses in Norway: how much power is lost, and can it be predicted?
• Selj, Josefine Helene Krogh & Riise, Heine Nygard (2021). Hvordan er den norske solressursen?
• Øgaard, Mari; Riise, Heine Nygard & Selj, Josefine Helene Krogh (2021). Estimation of Snow Loss for Photovoltaic Plants in Norway.
• Øgaard, Mari Benedikte; Riise, Heine Nygard & Selj, Josefine Helene Krogh (2021). Modeling Snow Losses in Photovoltaic Systems.
• Øgaard, Mari Benedikte; Aarseth, Bjørn Lupton; Skomedal, Åsmund; Riise, Heine Nygard; Sartori, Sabrina & Selj, Josefine Helene Krogh (2020). Identifying snow events in PV system data.
• Grini, Sigbjørn; Borgersen, Jon Arthur; Sky, Thomas Neset; Frodason, Ymir Kalmann; Riise, Heine Nygard & Zimmermann, Christian (2018). Omvisning MENA.
• Bathen, Marianne Etzelmüller; Vines, Lasse & Riise, Heine Nygard (2018). Ina tar valget: halvlederfysikk. Show summary

  Informasjonsvideo om pågående forskningsprosjekter og muligheter for å ta mastergrad ved gruppe for halvlederfysikk (LENS) ved Universitetet i Oslo (UiO). Bidraget ble publisert som en del av serien Ina tar valget på Snapchat-kanalen til fysisk institutt ved UiO.

• Kumar, Raj; Bergum, Kristin; Riise, Heine Nygard; Monakhov, Edouard & Svensson, Bengt Gunnar (2017). Impact of post annealing on hydrogen implanted Cu2O thin film for solar cell applications.
• Kumar, Raj; Bergum, Kristin; Riise, Heine Nygard; Azarov, Alexander; Monakhov, Edouard & Svensson, Bengt Gunnar (2017). Impact of post deposition annealing on electrical properties of Cu2O thin films.
• Kumar, Raj; Bergum, Kristin; Riise, Heine Nygard; Monakhov, Edouard & Svensson, Bengt Gunnar (2017). Electrical and optical characterization of p type Cu2O thin film for solar cell applications.
• Sky, Thomas Neset; Johansen, Klaus Magnus H; Vines, Lasse; Svensson, Bengt Gunnar & Riise, Heine Nygard (2017). Diffusion of Al in ZnO: the interplay with Zn-vacancies.
• Sky, Thomas Neset; Johansen, Klaus Magnus H; Vines, Lasse; Svensson, Bengt Gunnar & Riise, Heine Nygard (2017). Diffusion of Group III Elements in ZnO.
• Riise, Heine Nygard; Aarseth, Bjørn Brevig; Kjeldstad, Torunn; Borgersen, Jon Arthur & Olsen, Vegard Skiftestad (2017). Besøk frå deltakarar i Fysikk-OL.
• Riise, Heine Nygard; Bathen, Marianne Etzelmüller; Borgersen, Jon Arthur; Grini, Sigbjørn & Johansen, Klaus Magnus H (2017). Besøk frå Nanoskolen 2017.
• Riise, Heine Nygard; Bathen, Marianne Etzelmüller; Grini, Sigbjørn; Olsen, Vegard Skiftestad & Sky, Thomas Neset (2017). Omvisning MENA.
• Riise, Heine Nygard; Kjeldstad, Torunn; Sky, Thomas Neset & Borgersen, Jon Arthur (2017). MiNaLab-besøk frå Kongsskogen VGS.
• Johansen, Klaus Magnus H; Bergum, Kristin; Riise, Heine Nygard & Grini, Sigbjørn (2017). Advanced characterization of solar energy materials and novel solar cell concepts.
• Johansen, Klaus Magnus H; Sky, Thomas Neset; Vines, Lasse; Frodason, Ymir Kalmann; Riise, Heine Nygard & Bjørheim, Tor Svendsen [Show all 7 contributors for this article] (2016). The dynamic interplay between intrinsic defects and shallow donor dopants (Al and Ga) in ZnO.
• Johansen, Klaus Magnus H; Sky, Thomas Neset; Vines, Lasse; Frodason, Ymir Kalmann; Riise, Heine Nygard & Bjørheim, Tor Svendsen [Show all 7 contributors for this article] (2015). The Interplay between Ga Dopants and Intrinsic Defects in ZnO - Seen from the Diffusion Perspective .
• Riise, Heine Nygard; Olsen, Vegard S.; Azarov, Alexander; Galeckas, Augustinas; Monakhov, Edouard & Svensson, Bengt Gunnar (2015). Structural Characteristics of Homoepitaxial Radio Frequency Magnetron Sputter Deposited Zinc Oxide Thin Films.
• Riise, Heine Nygard; Schumann, Thomas; Azarov, Alexander; Hübner, Renè; Skorupa, Wolfgang & Svensson, Bengt Gunnar [Show all 7 contributors for this article] (2015). Formation of shallow Boron emitters in crystalline Silicon using Flash Lamp Annealing.
• Lindberg, Per Filip; Bregolin, Felipe; Riise, Heine Nygard; Wiesenhütter, Katarzyna; Ulrich, Wiesenhütter & Vines, Lasse [Show all 10 contributors for this article] (2014). Milisecond Flash Lamp Annealing of ZnO/:Al/p-Si structures.
• Riise, Heine Nygard; Schifano, Ramon; Galeckas, Augustinas; Azarov, Alexander; Monakhov, Edouard & Svensson, Bengt Gunnar (2014). A comparative study of annealing effects on Si and Al doped ZnO.
• Dobler, Andreas ; Berge, Erik; Hygen, Hans Olav; Grini, Sigbjørn & Riise, Heine Nygard (2024). Quality control of radiation data for solar resource mapping. Norwegian Meteorological Institute. ISSN 2387-4201.
• Riise, Heine Nygard (2021). Algoritmar for energimodellering av PV. IFE.
• Riise, Heine Nygard (2018). Materials and junctions for a novel oxide solar cell. Det matematisk-naturvitenskapelige fakultet.

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