Energimaterialer

Forskningsgruppen forsker på materialer som anvendes i energiteknologi. Vi legger særlig vekt på forskning knyttet til bærekraftig utvikling, med hovedfokus på materialer som anvendes i fornybar energiproduksjon og energilagring. Vi samarbeider med:

NORSK KATAPULTSENTER Future Materials

BATTERY COAST, ledet av UiA

Det norske forskningssenteret for solcelleenergi FME SUSOLTECH

Hovedområdene er:

• Solcelleteknologi: Solceller omvandler sollys til elektrisk energi.
• Batteriteknologi: Batterier kan lagre og levere elektrisk energi ved kjemiske reaksjoner.
• Brenselceller:  Brenselceller produserer elektrisk energi ved kjemiske reaksjoner, for eksempel omvandling av hydrogen til vanndamp.
• Termoelektriske materialer: Disse materialene kan omdanne to forskjellige temperatursoner til elektrisk energi. 

Laboratoriefasiliteter og teststasjoner for solcelleteknologi

Innendørs laboratoriemålinger:

Kontaktperson: Rune Strandberg

Utendørs stasjon:

Kontaktperson: Anne Gerd Imenes

Informasjon: 

UiA drifter et utendørs testanlegg for overvåkning og karakterisering av ulike typer PV moduler, samt kontinuerlig innsamling av solinnnstrålingsdata og meteorologiske data. Anlegget ligger på taket av bygg ved campus Grimstad og brukes til forskning og studentoppgaver.

Det overvåkes også et nett-tilknyttet anlegg som ligger på samme tak, hvor det er benyttet 4 ulike PV teknologier, optimizere og string-invertere. I tillegg installeres det flere nye PV anlegg på campus hvor data samles inn for overvåkning, analyse og forskning.

De ulike datakildene samles i en database som driftes av UiA og er tilgjengelig for student- og forskningsformål.

Laboratoriefasiliteter for batteriteknologi

Informasjon om Battery Coast sine fasiliteter:

Laboratorier finner du her

Her finner du all informasjon angående utstyr

Laboratoriefasiliteter for brenselceller

Kontaktperson: Tore Vehus

Laboratoriefasiliteter for termoelektriske materialer

Kontaktperson: Tore Vehus

Prosjekter

• Brenselceller – Fast Oksid, PEM og Alkalisk – med fokus på celletesting og nye materialer.
• Termoelektriske materialer – med fokus på materialtesting, nedbrytning og elektriske målinger.
• Syntese av materialer ved høy temperatur – Titanmetall, nyskapende ledende oksider, polymermembraner.
• Metallurgisk oppskalering – i samarbeid med NORCE.
• Teoretiske studier av nye solcellekonsepter.
• Samarbeid med REC SOLAR Norge om forbedring av kommersiell solcelleteknologi.
• Medlem av SuSolTec FME-programmet.
• Nytt takareal på J-bygg dedikert til utendørslaboratorium. Under utvikling.
• Nytt scanning elektronmikroskop, Jeol JSM-7200F, installert februar 2018.

Forskningssamarbeid

Vi er medlem av forskningssammenslutningen SuSolTec. Forskningssenteret for bærekraftig solcelleteknologi, som er et samarbeid mellom industri, universiteter og forskningsinstitusjoner.

Forskningspartnere innen flere forskningsfelt:

• University of Oslo
• Norwegian University of Science and Technology
• Elkem
• REC Solar
• EPFL, Lausanne
• Imperial College, London
• European Space Agency
• Scatec
• NORCE
• University of Aarhus
• Ioffe Institute, St. Petersburg
• University of New South Wales, Sydney
• Future Materials. Norwegian Catapult Centre.
• Fraunhofer ISE.

Publikasjoner og prosjekter

Publikasjoner (solcelleteknologi):

2023

• Garcia, Alfredo Sanchez; Kristensen, Sissel Tind; Strandberg, Rune (2023). The Recombination Parameter γ: Modeling and Comments. IEEE Journal of Photovoltaics. ISSN: 2156-3381. 13 (4). s 516 - 523. doi:10.1109/JPHOTOV.2023.3268399.
• Strandberg, Rune (2023). Using transfer coefficients to model series-connected multi-junction solar cells with radiative coupling. Applied Physics Letters. ISSN: 0003-6951. 122 (25). doi:10.1063/5.0152026.

2022

• Garcia, Alfredo Sanchez; Kristensen, Sissel Tind; Strandberg, Rune (2022). Analytical Modeling of the Temperature Sensitivity of the Maximum Power Point of Solar Cells. IEEE Journal of Photovoltaics. ISSN: 2156-3381. 12 (5). s 1237 - 1242. doi:10.1109/JPHOTOV.2022.3178175.
• Imenes, Anne Gerd (2022). PEARL PV Country Reports 2020 - Norway. PEARL PV Country Reports 2020. ISBN: 9789036553629. University of Twente. Chapter. s 187 - 199.
• Segbefia, Oscar Kwame; Akhtar, Naureen; Sætre, Tor Oskar (2022). The effect of moisture ingress on titania antireflection coatings in field-aged photovoltaic modules. 978-1-7281-6117-4. ISBN: 978-1-7281-6117-4, s 1237 - 1244. June 2022 DOI: 10.1109/PVSC48317.2022.9938896 Conference: 2022 IEEE 49th Photovoltaics Specialists Conference (PVSC).
• Segbefia, O.K.; Akhtar, N.; Sætre, T.O. (2023). Moisture induced degradation in field-aged multicrystalline silicon photovoltaic modules, Solar Energy Materials and Solar Cells 258, 112407. https://www.sciencedirect.com/science/article/pii/S0927024823002283?via%3Dihub

2021

• Garcia, Alfredo Sanchez; Strandberg, Rune (2021). Analytical Modeling of the Maximum Power Point with Series Resistance. Applied Sciences. ISSN: 2076-3417. 11 (22). doi:10.3390/app112210952.
• Garcia, Alfredo Sanchez; Kristensen, Sissel Tind; Strandberg, Rune (2021). Assessment of a New Analytical Expression for the Maximum-Power Point Voltage with Series Resistance. 2021 IEEE 48th Photovoltaic Specialists Conference (PVSC). ISBN: 978-1-6654-1922-2, s 0961 - 0965.
• Paudyal, Basant Raj; Imenes, Anne Gerd (2021). Investigation of temperature coefficients of PV modules through field measured data. Solar Energy. ISSN: 0038-092X. 224s 425 - 439. doi:10.1016/j.solener.2021.06.013.
• Segbefia, Oscar Kwame; Imenes, Anne Gerd; Sætre, Tor Oskar (2021). Moisture ingress in photovoltaic modules: A review. Solar Energy. ISSN: 0038-092X. 224s 889 - 906. doi:10.1016/j.solener.2021.06.055.
• Imenes, Anne Gerd; Noori, Nadia Saad; Uthaug, Ole Andreas Nesvåg; Kröni, Robert; Bianchi, Filippo Maria; Belbachir, Nabil (2021). A Deep Learning Approach for Automated Fault Detection on Solar Modules Using Image Composites. 2021 IEEE 48th Photovoltaic Specialists Conference (PVSC). ISBN: 978-1-6654-1922-2. 
• Paudyal, Basant Raj; Imenes, Anne Gerd (2021). Uniqueness verification of blue fraction as a parameter of spectral irradiance quantification. 2021 IEEE 48th Photovoltaic Specialists Conference (PVSC). ISBN: 978-1-6654-1922-2.
• Valckenborg, Roland; Berger, Karl A.; Gusztáv, Újvári; Eder, Gabriele C.; Gaisberger, Lukas; Tabakovic, Momir; López, Cristina S. Polo; Boddaert, Simon; Buono, Matteo del; Chivelet, Nuria Martín; Martinez, Asier Sanz; Kim, Jun-Tae; Imenes, Anne Gerd (2021). Comparison of IEC 61853-1 Matrix Evaluations Based on Indoor and Outdoor Measurement Data from PVPS Task 15 BIPV Round-Robin. EU PVSEC 2021 – 38th European Photovoltaic Solar Energy Conference and Exhibition. ISBN: 3-936338-78-7. EU PVSEC. PV Applications, Integration and Storage, Session 6DO.6.4. s 1381 - 1387.

2020

• R. Strandberg, An Analytic Approach to the Modeling of Multijunction Solar Cells
  IEEE Journal of Photovoltaics 10, 1701-1711 (2020), DOI: 10.1109/JPHOTOV.2020.3013974
• Paudyal, Basant Raj; Imenes, Anne Gerd (2020). Analysis of spectral irradiance distribution for PV applications at high latitude. 2020 47th IEEE Photovoltaic Specialists Conference (PVSC). ISBN: 978-1-7281-6116-7. IEEE conference proceedings. Chapter. s 1834 - 1841.
• Segbefia, Oscar Kwame; Imenes, Anne Gerd; Sætre, Tor Oskar (2020). Outdoor fault diagnosis of field-aged solar modules. European Photovoltaic Solar Energy Conference and Exhibition 37th EU PVSEC 2020. ISBN: 3-936338-73-6. EU PVSEC. Poster session 5CV.3.23.
• Strandberg, Rune (2020). An Analytic Approach to the Modeling of Multijunction Solar Cells. IEEE Journal of Photovoltaics. ISSN: 2156-3381. 10 (6). s 1701 - 1711. doi:10.1109/JPHOTOV.2020.3013974.
• Kristensen, Sissel Tind; Garcia, Alfredo Sanchez; Nie, Shuai; Hameiri, Ziv; Strandberg, Rune (2020). Improved Temperature Coefficient Modeling through the Recombination Parameter γ. 2020 47th IEEE Photovoltaic Specialists Conference (PVSC). ISBN: 978-1-7281-6116-7, s 83 - 87.
• Kristensen, Sissel Tind; Nie, Shuai; Berthod, Charly; Strandberg, Rune; Odden, Jan Ove; Hameiri, Ziv (2020). Temperature Coefficients of Crystal Defects in Multicrystalline Silicon Wafers. IEEE Journal of Photovoltaics. ISSN: 2156-3381. 10 (2). s 449 - 457. doi:10.1109/JPHOTOV.2020.2968111.
• Garcia, Alfredo Sanchez; Kristensen, Sissel Tind; Narten Christiansen, Sjur; Strandberg, Rune (2020). Temperature Coefficients of Solar Cell Parameters at Maximum Power Point. 2020 47th IEEE Photovoltaic Specialists Conference (PVSC). ISBN: 978-1-7281-6116-7, s 1232 - 1237.

2019

• Reinders, Angele; van Slooten, Fjodor; Moser, David; van Sark, Wilfried; Oreski, Gernot; Ottersboeck, Bettina; Pearsall, Nicola; Devetaković, Mirjana; Leloux, Jonathan; Bogatinoska, Dijana Capeska; Braun, Christian; Imenes, Anne Gerd; Driesse, Anton (2019). Development of a big data bank for PV monitoring data, analysis and simulation in COST Action ‘PEARL PV’. EU PVSEC 2019 (Marseille). 36th European Photovoltaic Solar Energy Conference And Exhibition. Proceedings. ISBN: 3-936338-60-4. WIP. s 1600 - 1604.
• Reinders, Angele; van Slooten, Fjodor; Moser, David; van Sark, Wilfried; Oreski, Gernot; Ottersboeck, Bettina; Pearsall, Nicola; Devetakovic, Mirjana; Leloux, Jonathan; Bogatinoska, Dijana Capeska; Braun, Christian; Imenes, Anne Gerd; Driesse, Anton (2019). Development of a big data bank for PV monitoring data, analysis and simulation in COST Action ‘PEARL PV’. 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC). ISBN: 978-1-7281-0494-2, s 1388 - 1392.
• Paudyal, Basant Raj; Imenes, Anne Gerd (2019). Performance assessment of field deployed multi-crystalline PV modules in Nordic conditions. Conference record of the Photovoltaic Specialists Conference. ISSN: 0160-8371. doi:10.1109/PVSC40753.2019.8980629.
• Kristensen, Sissel Tind; Nie, Shuai; Wiig, Marie Syre; Haug, Halvard; Berthod, Charly; Strandberg, Rune; Hameiri, Ziv (2019). A high-accuracy calibration method for temperature dependent photoluminescence imaging. AIP Conference Proceedings. ISSN: 0094-243X. 2147 (1). doi:10.1063/1.5123812.
• Strandberg, Rune (2019). A summary of expressions for central performance parameters of high efficiency solar cell concepts. 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC). ISBN: 978-1-7281-0494-2. 
• Garcia, Alfredo Sanchez; Strandberg, Rune (2019). Analytical Expressions for Radiative Losses in Solar Cells. 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC). ISBN: 978-1-7281-0494-2. 
• Kristensen, Sissel Tind; Nie, Shuai; Berthod, Charly; Strandberg, Rune; Odden, Jan Ove; Hameiri, Ziv (2019). How Gettering Affects the Temperature Sensitivity of the Implied Open Circuit Voltage of Multicrystalline Silicon Wafers. 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC). ISBN: 978-1-7281-0494-2, s 1 - 7.
• Berthod, Charly; Søndergaard, Sissel Tind; Strandberg, Rune; Odden, Jan Ove; Nie, Shuai; Hameiri, Ziv; Sætre, Tor Oskar (2019). Temperature Sensitivity of Multicrystalline Silicon Solar Cells. IEEE Journal of Photovoltaics. ISSN: 2156-3381. 9 (4). s 927 - 964. doi:10.1109/JPHOTOV.2019.2911871.

2018

• Strandberg, Rune (2018). Analytic JV -Characteristics of Ideal Impurity PV-Cells. 2017 IEEE 44th Photovoltaic Specialist Conference (PVSC). ISBN: 978-1-5090-5605-7
• Kristensen, Sissel Tind; Odden, Jan Ove; Strandberg, Rune (2018). Minority Carrier Lifetime Variations in Multicrystalline Silicon Wafers with Temperature and Ingot Position. 2017 IEEE 44th Photovoltaic Specialist Conference (PVSC). ISBN: 978-1-5090-5605-7, s 2651 - 2655.
• Kristensen, Sissel Tind; Odden, Jan Ove; Strandberg, Rune (2018). Temperature Dependent Suns-Voc of Multicrystalline Silicon Cells from Different Ingot Positions. Proceedings of 7th World Conference on Photovoltaic Energy Conversion (WCPEC-7) 2018. ISBN: 978-1-5386-8529-7, s 2244 - 2247.
• Illich, P.; Eder, G.C.; Berger, K.A.; Ùjvàri, G.; Rechberger, P.; Moor, D.; Aichinger, M.; Boddaert, S.; Valckenborg, R.M.E.; van den Brand, J.; Bonomo, P.; Frontini, F.; Polo Lòpez, C.S.; Del Buono, M.; Imenes, Anne Gerd; Martìn Chivelet, N.; Chenlo, F.; Sanz Martinez, A.; Machado, M.; Kim, J.-T.; Masolin, A.; Ritzen, M. (2018). Comparative Performance Measurements of Identical BIPV-Elements in Different Climatic Environments - A Round Robin Action within the IEA PVPS Task 15 Collaboration. Proceedings of the European Photovoltaic Solar Energy Conference. ISSN: 2196-100X. s 1794 - 1800. doi:10.4229/35thEUPVSEC20182018-6BV.1.32.
• Imenes, Anne Gerd; Selj, Josefine Helene Krogh (2018). Irradiance and Temperature Distributions at High Latitudes: Design Implications for Photovoltaic Systems. 2017 IEEE 44th Photovoltaic Specialist Conference (PVSC). ISBN: 978-1-5090-5605-7, s 619 - 625.
• Paudyal, Basant Raj; Imenes, Anne Gerd; Sætre, Tor Oskar (2018). Review of Guidelines for PV Systems Performance and Degradations Monitoring. Proceedings of the European Photovoltaic Solar Energy Conference. ISSN: 2196-100X. s 2037 - 2050. doi:10.4229/35thEUPVSEC20182018-6DV.1.32.
• Sætre, Tor Oskar (2018). Simulations of some effects on grain boundaries in solar cells. Proceedings of the European Photovoltaic Solar Energy Conference. ISSN: 2196-100X. s 107 - 109. doi:10.4229/35thEUPVSEC20182018-1CV.4.9.

2017

• R. Strandberg, The JV-Characteristic of Intermediate Band Solar Cells with Overlapping Absorption Coefficients, IEEE Transactions on Electron Devices 64, 5027-5033 (2017), DOI: 10.1109/TED.2017.276276
• R. Strandberg, Analytic JV-Characteristics of Ideal Intermediate Band Solar Cells and Solar Cells with Up and Downconverters, IEEE Transactions on Electron Devices 64, 2275-2282 (2017), DOI:10.1109/TED.2017.2686359
• Sørensen, Åse Lekang; Imenes, Anne Gerd; Grynning, Steinar; Dokka, Tor Helge (2017). Energy measurements at Skarpnes zero energy homes in Southern Norway: Do the loads match up with the on-site energy production?. Energy Procedia. ISSN: 1876-6102. 132s 567 - 573. doi:10.1016/j.egypro.2017.09.743.
• Fedorova, Anna; Jelle, Bjørn Petter; Andenæs, Erlend; Imenes, Anne Gerd; Aunrønning, Ole; Schlemminger, Christian; Geving, Stig (2017). Large-Scale Laboratory Investigation of Building Integrated Photovoltaics - A Review of Methods and Opportunities. Proceedings of 1st International Conference on Building Integrated Renewable Energy Systems (BIRES 2017). ISBN: 978-9963-697-23-6. Dublin Institute of Technology (DIT) Ireland. Paper 30.
• Linjord, Torjus; O'Born, Reyn Joseph; Imenes, Anne Gerd (2017). Life cycle analysis of building integrated photovoltaic roof tile for use in Norwegian conditions. RIL. Suomen Rakennusinsinöörien Liitto. ISSN: 0356-9403. s 25 - 32.
• Strandberg, Rune (2017). Analytic JV-Characteristics of Ideal Intermediate Band Solar Cells and Solar Cells With Up and Downconverters. IEEE Transactions on Electron Devices. ISSN: 0018-9383. 64 (5). s 2275 - 2282. doi:10.1109/TED.2017.2686359.
• Strandberg, Rune (2017). The JV-Characteristic of Intermediate Band Solar Cells With Overlapping Absorption Coefficients. IEEE Transactions on Electron Devices. ISSN: 0018-9383. 64 (12). s 5027 - 5030. doi:10.1109/TED.2017.2762761.

2016

• Imenes, Anne Gerd; Kanters, Jouri (2016). 3D Solar Maps for the Evaluation of Building Integrated Photovoltaics in Future City Districts: a Norwegian Case Study. IEEE 43rd Photovoltaic Specialists Conference 2016 (PVSC). ISBN: 978-1-5090-2724-8. IEEE Press, s 3141 - 3146.
• Imenes, Anne Gerd (2016). Performance of BIPV and BAPV Installations in Norway. IEEE 43rd Photovoltaic Specialists Conference 2016 (PVSC). ISBN: 978-1-5090-2724-8. IEEE Press, s 3147 - 3152.
• Imenes, Anne Gerd (2016). Performance of Zero Energy Homes in Smart Village Skarpnes. IEEE 43rd Photovoltaic Specialists Conference 2016 (PVSC). ISBN: 978-1-5090-2724-8. IEEE Press, s 3153 - 3158.
• Azmi, Aimie Nazmin Bin; Dahlberg, Ivan N.; Kolhe, Mohan Lal; Imenes, Anne Gerd (2016). Impact of Increasing Penetration of Photovoltaic (PV) Systems on Distribution Feeders. 2015 International Conference on Smart Grid and Clean Energy Technologies. ISBN: 978-1-4673-8734-7. IEEE conference proceedings. Smart Grid. s 70 - 74.
• Strandberg, Rune (2016). Comparison of the sensitivity to spectral variation of voltage- and current-matched tandem devices with luminescent coupling and thickness optimization. Conference record of the Photovoltaic Specialists Conference. ISSN: 0160-8371. 2016-Novembers 358 - 363. doi:10.1109/PVSC.2016.7749611.
• Berthod, Charly; Strandberg, Rune; Yordanov, Georgi Hristof; Beyer, Hans-Georg; Odden, Jan Ove (2016). On the variability of the temperature coefficients of mc-Si solar cells with irradiance. Energy Procedia. ISSN: 1876-6102. 92s 2 - 9. doi:10.1016/j.egypro.2016.07.002.
• Berthod, Charly; Strandberg, Rune; Odden, Jan Ove; Sætre, Tor Oskar (2016). Reduced temperature sensitivity of multicrystalline silicon solar cells with low ingot resistivity. Conference record of the Photovoltaic Specialists Conference. ISSN: 0160-8371, s 2398 - 2402. doi:10.1109/PVSC.2016.7750071.
• Sætre, Tor Oskar (2016). Simulation of IQE tuning of individual cells for DC-balancing multijunction tandem cells. Conference record of the Photovoltaic Specialists Conference. ISSN: 0160-8371, s 350 - 353. doi:10.1109/PVSC.2016.7749609.
• Sætre, Tor Oskar (2016). Simulations of the effect of the contact energy levels on a simple model of a hot carrier cell. IEEE 43rd Photovoltaic Specialists Conference 2016 (PVSC). ISBN: 978-1-5090-2724-8. IEEE Press. chapter. s 0354 - 0357.

2015

• R. Strandberg, Heat to electricity conversion by cold carrier emissive energy harvesters
  Journal of Applied Physics 118, 215102 (2015), DOI: 10.1063/1.4936614 
• R. Strandberg, Theoretical limits for thermoradiative energy conversion
  Journal of Applied Physics 117, 055105 (2015), DOI: 10.1063/1.4907392
• R. Strandberg, Detailed balance analysis of area de-coupled double tandem photovoltaic modules, Applied Physics Letters 106, 033902 (2015), DOI: 10.1063/1.4906602 
• Strandberg, Rune (2015). Detailed balance analysis of area de-coupled double tandem photovoltaic modules. Applied Physics Letters. ISSN: 0003-6951. 106 (3). doi:10.1063/1.4906602.
• Strandberg, Rune (2015). Heat to electricity conversion by cold carrier emissive energy harvesters. Journal of Applied Physics. ISSN: 0021-8979. 118 (21). doi:10.1063/1.4936614.
• Berthod, Charly; Strandberg, Rune; Odden, Jan Ove; Sætre, Tor Oskar (2015). Reduction of temperature coefficients in multicrystalline silicon solar cells after light-induced degradation. Photovoltaic Specialist Conference (PVSC), 2015 IEEE 42nd. ISBN: 978-1-4799-7944-8.
• Strandberg, Rune (2015). Spectral and temperature sensitivity of area de-coupled tandem modules. Photovoltaic Specialist Conference (PVSC), 2015 IEEE 42nd. ISBN: 978-1-4799-7944-8.
• Berthod, Charly; Strandberg, Rune; Odden, Jan Ove (2015). Temperature Coefficients of Compensated Silicon Solar Cells – Influence of Ingot Position and Blend-in-ratio. Energy Procedia. ISSN: 1876-6102. 77s 15 - 20. doi:10.1016/j.egypro.2015.07.004.
• Strandberg, Rune (2015). Theoretical efficiency limits for thermoradiative energy conversion. Journal of Applied Physics. ISSN: 0021-8979. 117 (5). doi:10.1063/1.4907392.
• Beyer, Hans-Georg; Imenes, Anne Gerd (2015). Influence of the Inclusion of Storage in Grid-Connected Domestic PV-Systems on the Predictability of the Power Exchange with the Grid. Proceedings of the European Photovoltaic Solar Energy Conference. ISSN: 2196-100X. 2015s 2770 - 2773. doi:10.4229/EUPVSEC20152015-6AV.4.14.
• Imenes, Anne Gerd; Beyer, Hans-Georg; Boysen, Kjetil Rostoft; Odden, Jan Ove; Grundt, Rolf Erlend (2015). Performance of grid-connected PV system in Southern Norway. 2015 IEEE 42nd Photovoltaic Specialist Conference (PVSC 2015). ISBN: 9781479979431. Curran Associates, Inc.
• Azmi, Aimie Nazmin Bin; Kolhe, Mohan Lal; Imenes, Anne Gerd (2015). Review on Photovoltaic Based Active Generator. The 9th International Symposium on Advanced Topics in Electrical Engineering. ISBN: 9781479975150. Curran Associates, Inc.. Chapter. s 812 - 815.
• Sætre, Tor Oskar (2015). Challenges with Balancing Excitations in Intermediate-Band Solar Cells. Photovoltaic Specialist Conference (PVSC), 2015 IEEE 42nd. ISBN: 978-1-4799-7944-8.
• Sætre, Tor Oskar (2015). Effect of Quantum Efficiency on the Performance of Multijunction Tandem Cells. Photovoltaic Specialist Conference (PVSC), 2015 IEEE 42nd. ISBN: 978-1-4799-7944-8. 

2009-2014

• Strandberg, Rune (2014). The limiting efficiency of four-band cells revisited. 40th IEEE Photovoltaic Specialists Conference. ISBN: 978-1-4799-4398-2, s 280 - 284.
• Yordanov, Georgi Hristov; Sætre, Tor Oskar; Midtgård, Ole-Morten (2014). 1.6 suns at 58°20'N - the solar resource in southern Norway. 40th IEEE Photovoltaic Specialists Conference, Proceedings of the. ISBN: 978-1-4799-4398-2, s 0815 - 0820.
• Tayyib, Muhammad; Odden, Jan Ove; Sætre, Tor Oskar (2014). Influence of Spectral Composition on the Temperature Coefficients of Solar Cells from Elkem Solar. 40th IEEE Photovoltaic Specialists Conference, Proceedings of the. ISBN: 978-1-4799-4398-2, s 2630 - 2634.
• Sætre, Tor Oskar (2014). Monte Carlo Generated Photon Spectra for Device Simulation. Proceedings 29th European Photovoltaic Solar Energy Conference and Exhibition. ISBN: 3-936338-34-5. WIP Renewable Energies, s 73 - 75.
• Berthod, Charly; Odden, Jan Ove; Sætre, Tor Oskar (2014). Scanning electron microscopy analysis of defect clusters in multicrystalline solar grade silicon solar cells. 40th IEEE Photovoltaic Specialists Conference, Proceedings of the. ISBN: 978-1-4799-4398-2, s 2947 - 2950.
• Tayyib, Muhammad; Odden, Jan Ove; Sætre, Tor Oskar (2014). Temperature Coefficients of Solar Cells from Elkem Solar under Varied Intensities and Selective Wavelength Regions of the AM 1.5 Spectrum. Proceedings 29th European Photovoltaic Solar Energy Conference and Exhibition. ISBN: 3-936338-34-5. WIP Renewable Energies, s 3378 - 3382.
• Tayyib, Muhammad; Odden, J. O.; Ramchander, N.; Prakash, M. B.; Surendra, T. S.; Muneeshwar, R.; Sarman, A. V.; Ramanjaneyulu, M.; Sætre, Tor Oskar (2014). Two Years Performance Comparison of Elkem Solar Multicrystalline Silicon with Polysilicon in a PV Grid-Connected System. 40th IEEE Photovoltaic Specialists Conference. ISBN: 978-1-4799-4398-2, s 3230 - 3233.
• Yordanov, Georgi Hristov; Sætre, Tor Oskar; Midtgård, Ole-Morten (2013). 100-millisecond Resolution for Accurate Overirradiance Measurements. IEEE Journal of Photovoltaics. ISSN: 2156-3381. 3 (4). s 1354 - 1360. doi:10.1109/JPHOTOV.2013.2264621.
• Tayyib, Muhammad; Odden, Jan Ove; Ramchander, N.; Prakash, M. B.; Surendra, T. S.; Muneeshwar, R.; Sarma, A.V.; Ramanjaneyulu, M.; Sætre, Tor Oskar (2013). A Materials Perspective on one Full Year Performance of Multicrystalline Si PV Modules in a Grid-Connected System. 28th European Photovoltaic Solar Energy Conference: Proceedings. ISBN: 3-936338-33-7. WIP. s 4166 - 4170.
• Yordanov, Georgi Hristov; Sætre, Tor Oskar; Midtgård, Ole-Morten (2013). Differential Analysis of PV Module I-V Curves. 28th European Photovoltaic Solar Energy Conference: Proceedings. ISBN: 3-936338-33-7. WIP. 4AV.5.17. s 3207 - 3211.
• Tayyib, Muhammad; Odden, Jan Ove; Sætre, Tor Oskar (2013). Effect of Temperature and Sun Intensity on Multicrystalline Silicon Solar Cells. 28th European Photovoltaic Solar Energy Conference: Proceedings. ISBN: 3-936338-33-7. WIP. s 1595 - 1598.
• Tayyib, Muhammad; Odden, Jan Ove; Hvidsten Dahl, E.; Baggethun, P.; Sætre, Tor Oskar (2013). Elkem Silicon vs Polysilicon: A Quantitative Impurity Element Analyses. 28th European Photovoltaic Solar Energy Conference: Proceedings. ISBN: 3-936338-33-7. WIP. s 1692 - 1697.
• Yordanov, Georgi Hristov; Midtgård, Ole-Morten; Sætre, Tor Oskar (2013). Ideality factor behavior between the maximum power point and open circuit. 39th Photovoltaic Specialists Conference (PVSC), 2013 IEEE, Proceedings. ISBN: 978-1-4799-3299-3, s 729 - 733.
• Tayyib, Muhammad; Odden, Jan Ove; Preis, Primin; Sætre, Tor Oskar (2013). Impurity Analyses of Silicon Wafers from different Manufacturing Routes and Their Impact on LID of Finished Solar Cells. 39th Photovoltaic Specialists Conference (PVSC), 2013 IEEE, Proceedings. ISBN: 978-1-4799-3299-3, s 1454 - 1458.
• Tayyib, Muhammad; Dahl, Espen H; Odden, Jan Ove; Baggethun, P.; Sætre, Tor Oskar (2013). Microscopic Defects and Impurity Analyses of Multicrystalline Silicon Solar Cells from Different Manufacturing Routes. 39th Photovoltaic Specialists Conference (PVSC), 2013 IEEE, Proceedings. ISBN: 978-1-4799-3299-3, s 1459 - 1464.
• Yordanov, Georgi Hristov; Sætre, Tor Oskar; Midtgård, Ole-Morten (2013). Optimal temporal resolution for detailed studies of cloud-enhanced sunlight (Overirradiance). 39th Photovoltaic Specialists Conference (PVSC), 2013 IEEE, Proceedings. ISBN: 978-1-4799-3299-3, s 985 - 988.
• Yordanov, Georgi Hristov; Midtgård, Ole-Morten; Sætre, Tor Oskar; Nielsen, Henrik Kofoed; Norum, Lars Einar (2013). Overirradiance (Cloud Enhancement) Events at High Latitudes. IEEE Journal of Photovoltaics. ISSN: 2156-3381. 3 (1). s 271 - 277. doi:10.1109/JPHOTOV.2012.2213581.
• Yordanov, Georgi Hristov; Sætre, Tor Oskar; Midtgård, Ole-Morten (2013). Overirradiance Studies Require Subsecond Resolution; Exclude Thermopile Pyranometers and Commercial Data Loggers. 28th European Photovoltaic Solar Energy Conference: Proceedings. ISBN: 3-936338-33-7. WIP. 4AV.6.32. s 3455 - 3459.
• Tayyib, Muhammad; Odden, Jan Ove; Ramchander, N.; Prakash, M. B.; Surendra, T. S.; Muneeshwar, R.; Sarma, A.V.; Ramanjaneyulu, M; Sætre, Tor Oskar (2013). Performance Assessment of a Grid-Connected mc-Si PV System made up of Silicon Material from Different Manufacturing Routes. 39th Photovoltaic Specialists Conference (PVSC), 2013 IEEE, Proceedings. ISBN: 978-1-4799-3299-3, s 109 - 114.
• Tayyib, Muhammad; Odden, Jan Ove; Sætre, Tor Oskar (2013). UV-induced Degradation Study of Multicrystalline Silicon Solar Cells Made from Different Silicon Materials. Energy Procedia. ISSN: 1876-6102. 38s 626 - 635. doi:10.1016/j.egypro.2013.07.326.
• Beyer, Hans-Georg; Sætre, Tor Oskar; Yordanov, Georgi Hristov (2013). Using broad-band irradiance data to model the short circuit response of aSi modules. 39th Photovoltaic Specialists Conference (PVSC), 2013 IEEE, Proceedings. ISBN: 978-1-4799-3299-3, s 751 - 753.
• Tayyib, Muhammad; Theobald, Jens; Peter, Kristian; Odden, Jan Ove; Sætre, Tor Oskar (2012). Accelerated Light-Induced Defect Transformation Study of Elkem Solar Grade Silicon. Energy Procedia. ISSN: 1876-6102. 27s 21 - 26. doi:10.1016/j.egypro.2012.07.023.
• R. Strandberg, Evaluation of a selection of Intermediate Band Materials Based on Their Absorption Coefficients, IEEE Journal of Photovoltaics 3, 997-1003 (2013), DOI: 10.1109/JPHOTOV.2013.2261119
• R. Strandberg, I. Aguilera, Evaluation of vanadium substituted In2S3 as a material for intermediate band solar cells, Solar Energy Materials and Solar Cells 98, 88-93 (2012).
• Beyer, Hans-Georg; Yordanov, Georgi Hristov; Midtgård, Ole-Morten; Sætre, Tor Oskar; Imenes, Anne Gerd (2011). CONTRIBUTIONS TO THE KNOWLEDGE BASE ON PV PERFORMANCE: EVALUATION OF THE OPERATION OF PV SYSTEMS USING DIFFERENT TECHNOLOGIES INSTALLED IN SOUTHERN NORWAY. 37th IEEE Photovoltaic Specialists Conference, Seattle, June 19-24, 2011. Proceedings. ISBN: 9781424499663.
• Imenes, Anne Gerd; Yordanov, Georgi Hristov; Midtgård, Ole-Morten; Sætre, Tor Oskar (2011). Development of a Test Station for Accurate in Situ I-V Curve Measurements of Photovoltaic Modules in southern Norway. 37th IEEE Photovoltaic Specialists Conference, Seattle, June 19-24, 2011. Proceedings. ISBN: 9781424499663.
• Midtgård, Ole-Morten; Sætre, Tor Oskar; Yordanov, Georgi; Imenes, Anne Gerd; Nge, Chee Lim (2010). A qualitative examination of performance and energy yield of photovoltaic modules in southern Norway. Renewable Energy. ISSN: 0960-1481. 35 (6). s 1266 - 1274. doi:10.1016/j.renene.2009.12.002.
• Yordanov, Georgi Hristov; Midtgård, Ole-Morten; Sætre, Tor Oskar; Odden, Jan Ove; Buseth, Torfinn; Imenes, Anne Gerd; Nge, Chee Lim; Norum, Lars Einar (2010). Compensated SoG-Si from a Metallurgical Route: High Latitude Outdoor Performance. 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion. ISBN: 3-936338-26-4. WIP. 36. s 4289 - 4293.
• Nge, Chee Lim; Midtgård, Ole-Morten; Yordanov, Georgi Hristov; Norum, Lars Einar; Sætre, Tor Oskar (2010). A New maximum power point tracking approach for partial shading conditionsance. 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion. ISBN: 3-936338-26-4. WIP. 36. s 4475 - 4478.
• Sætre, Tor Oskar; Yordanov, Georgi Hristov; Midtgård, Ole-Morten; Odden, Jan Ove (2010). A THEORETICAL STUDY OF THE EFFECT OF DEGRADATION CAUSED BY DIFFUSION OVER A 30-YEAR LIFESPAN IN c-Si PV DEVICES. Conference record of the Photovoltaic Specialists Conference. ISSN: 0160-8371. s 1732 - 1736.
• Imenes, Anne Gerd; Odden, Jan-Ove; Yordanov, Georgi Hristov; Midtgård, Ole-Morten (2010). Field Stations in Norway and Kenya for Comparative Analysis of Compensated and Standard Solar-Grade Polysilicon Modules. 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion. ISBN: 3-936338-26-4. WIP. kapittel.
• Nge, Chee Lim; Midtgård, Ole-Morten; Sætre, Tor Oskar; Norum, Lars Einar (2010). Energy management for Grid-Connected PV system with storage battery. 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion. ISBN: 3-936338-26-4. WIP. 36. s 4688 - 4691.
• Yordanov, Georgi Hristov; Midtgård, Ole-Morten; Sætre, Tor Oskar (2010). Extracting parameters from semi-log plots of polycrystalline silicon PVmoduls outdoor I-V data : double-exponential model revisited. 35th IEEE Photovoltaic Specialists Conference Honolulu, HI June 20-25, 2010. ISBN: 978-1-4244-5891-2. IEEE Press. s 002756 - 002761.
• Dahl, Espen Hvidsten; Osinniy, v.; Larsen, Arne Nylandsted; Tronstad, Ragnar; Middleton, Peter Hugh; Sætre, Tor Oskar; Friestad, Kenneth (2010). IRON IMPURITIES IN WAFERS BASED ON DIFFERENT So-G SILICON FEEDSTOCK. Conference record of the Photovoltaic Specialists Conference. ISSN: 0160-8371. (36). s 1571 - 1575.
• Verma, Deepak; Dutta, V; Midtgård, Ole-Morten; Sætre, Tor Oskar (2010). TiO2 Nanoparticles Mixed P3HT Hybrid Absorbing Layer. Conference record of the Photovoltaic Specialists Conference. ISSN: 0160-8371. (36). s 806 - 809.
• Yordanov, Georgi Hristov; Midtgård, Ole-Morten; Sætre, Tor Oskar (2010). Two Diode Model Revisited: Parameters Extraction from Semi-log Plots of I-V Data. Conference record of the Photovoltaic Specialists Conference. ISSN: 0160-8371. (36). s 4156 - 4163.
• Yordanov, Georgi Hristov; Midtgård, Ole-Morten; Sætre, Tor Oskar (2010). Two-diode model revisited : parameters extraction form semi-log plots of I-V data. 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion. ISBN: 3-936338-26-4. WIP. s 4156 - 4163.
• Nge, Chee Lim; Yordanov, Georgi Hristov; Midtgård, Ole-Morten; Sætre, Tor Oskar; Norum, Lars Einar (2009). A Comparative Simulation Analysis of Maximum Power Point Tracking Approaches. 24th European Photovoltaic Solar Energy Conference and Exhibition Proceedings. ISBN: 3-936338-25-6. 
• Nge, Chee Lim; Midtgård, Ole-Morten; Sætre, Tor Oskar (2009). A Comparative Simulation Analysis of Maximum Power Point Tracking Approaches. Nordisk lyrikktrafikk. Modernisme i nordisk lyrikk 3. ISBN: 978-952-10-6003-8. Helsinki University Press, s 120 - 142.
• Nge, Chee Lim; Midtgård, Ole-Morten; Norum, Lars E.; Sætre, Tor Oskar (2009). Power Loss Analysis for Single Phase Grid-Connected PV Inverters. Proceedings of INTELEC 09-31st International Telecommunications Conference. ISBN: 9781424424900, s 5.