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Rune Strandberg

Rune Strandberg

Associate Professor

Department of Engineering Sciences >

 

+47 37 23 34 63

+47 996 23 913

Office:
H4043 ( Jon Lilletuns vei 9, Grimstad )

Education

  • 2000-2005: Master of Technology, technical physics, NTNU. Specialization in semiconductor physics, functional materials and energy physics.
  • 2005-2010: PhD in solar cell physics, Department of Physics, NTNU

Working experience

  • 2005-2009: PhD student at NTNU, Trondheim
  • 2010-2013: Senior researcher, Teknova AS, Kristiansand
  • Since 2013: Associate professor at Department of Engineering Science, UiA, Grimstad

Pedagogical competence

  • 2014-2015: Uniped, course in university pedagogics, UiA
  • 2014-2015: Qualifying course for doctoral supervision, UiA/UiS/UiN

From 2015 to 2019, I coordinated the bachelor program in renewable energy.

Academic interests

  • New photovoltaic concepts
  • Characterization of photovoltaic cells
  • Solar cell physics
  • Emitting energy harvesters

Previous research includes analysis of the electricity production from solar cells in Norway, field testing of PV modules, characterization of solar cell silicon, solar cells used in zero energy buildings and monitoring of the energy consumption in modern homes.

Teaching

I am teaching, or have been involved in, the following courses:

  • ENE100 - Renewable Energy end Energy Lab
  • ENE109 - Energy lab
  • ENE111 - Renewable energy
  • ENE112 - Renewable energy for Y-vei
  • ENE235 - Electromagnetism
  • ENE418 - Data Analysis and Modelling Techniques in Renewable Energy
  • ENE604 - Advanced Photovoltaics
  • FYS128 - Physics for engineers
  • MAS130 - Materials Technology and 3Dcad
  • Course responsible for ENE304 - Energy bachelor projects

Projects

Member of the research group for energy materials. Ongoing research includes new methods for conversion of heat to electricity and theoretical analysis of advanced photovoltaic concepts. Is also involved in research on silicon solar cells through supervision/co-supervision of the following PhD-students:

  • Charly Berthod, “Temperature coefficients of multicrystalline compensated silicon solar cells”:The project aimed at investigating how material and cell parameters impact the temperature coefficients of multicrystalline silicon solar cells. Charly Berthod received his degree in January 2017.
  • Sissel Tind Søndergaard: The project aims at explaining the fundamental mechanisms behind the findings of Charly Berthod. Similar cells will be characterized with methods like light beam induced current (LBIC), photoluminescense (PL) and suns-Voc. Sissel Søndergaard received her degree in December 2020.
  • Alfredo Gercia Sanchez: Is working on a projects that aims at modelling properties of solar cells mathematically. Alfredo defended his thesis in December 2022.

Parts of the research on silicon solar cells was carried out in cooperation with Elkem Solar.

Selected publications

Journal articles as lead author

R. Strandberg
Using transfer coefficients to model series-connected multi-junction solar cells with radiative coupling
Applied Physics Letters 122 (2023). doi:10.1063/5.0152026.

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

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.2017.2762761 

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 

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

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), DOI: 10.1016/j.solmat.2011.10.008

R. Strandberg, T. W. Reenaas
Initial theoretical study of solar cells with an intermediate band of non-zero width and a thermalized electron population, Progress in Photovoltaics: Research and Applications 20, 431-441 (2011), DOI: 10.1002/pip.1155

R. Strandberg, T. W. Reenaas
Optimal Filling of the Intermediate Band in Idealized Intermediate-Band Solar Cells, IEEE Transactions on Electron Devices 58, 2559-2565 (2011), DOI: 10.1109/TED.2011.2155659  

R. Strandberg, T. W. Reenaas 
Drift-diffusion model for intermediate band solar cells including photofilling effects, Progress in Photovoltaics: Research and Applications 19, 21-32 (2011), DOI: 10.1002/pip.983

R. Strandberg, T. W. Reenaas
Limiting efficiency of intermediate band solar cells with spectrally selective reflectors, Applied Physics Letters 97, 031910 (2010), DOI: 10.1063/1.3466269

R. Strandberg, T.W. Reenaas
Photofilling of intermediate bands, Journal of Applied Physics 105, 124512 (2009), DOI: 10.1063/1.3153141 

Scientific publications

  • Strandberg, Rune; Imenes, Anne Gerd (2024). Bandgap Optimization of Photovoltaic Tandem Cells Based on Spectra Collected over a Full Year. Solar RRL. ISSN: 2367-198X. doi:10.1002/solr.202400490.
  • 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.
  • 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.
  • 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. IEEE conference proceedings. Konferanseartikkel. s 0961 - 0965.
  • 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. IEEE conference proceedings. Konferanseartikkel. 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. IEEE conference proceedings. Konferanseartikkel. s 1232 - 1237.
  • 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. IEEE conference proceedings.
  • 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. IEEE conference proceedings.
  • 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. IEEE conference proceedings. KAPITTEL. 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.
  • Strandberg, Rune (2018). Analytic JV -Characteristics of Ideal Impurity PV-Cells. 2017 IEEE 44th Photovoltaic Specialist Conference (PVSC). ISBN: 978-1-5090-5605-7. IEEE conference proceedings. Konferanseartikkel.
  • 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. IEEE conference proceedings. Konferanseartikkel. 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. IEEE conference proceedings. Conference proceedings. s 2244 - 2247.
  • 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.
  • 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. 2016-Novembers 2398 - 2402. doi:10.1109/PVSC.2016.7750071.
  • 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. IEEE conference proceedings. Konferanseartikkel i proceedings.
  • 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. IEEE conference proceedings. Artikkel.
  • 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.
  • Strandberg, Rune (2014). The limiting efficiency of four-band cells revisited. 40th IEEE Photovoltaic Specialists Conference, Proceedings of the. ISBN: 978-1-4799-4398-2. IEEE conference proceedings. Kapittel. s 280 - 284.
  • Strandberg, Rune (2013). Evaluation of a selection of intermediate band materials based on their absorption coefficients. IEEE Journal of Photovoltaics. ISSN: 2156-3381. 3 (3). s 997 - 1003. doi:10.1109/JPHOTOV.2013.2261119.
  • Strandberg, Rune; Aguilera, Irene (2012). Evaluation of vanadium substituted In2S3 as a material for intermediate band solar cells. Solar Energy Materials and Solar Cells. ISSN: 0927-0248. 98s 88 - 93. doi:10.1016/j.solmat.2011.10.008.
  • Strandberg, Rune; Reenaas, Turid Worren (2012). Initial theoretical study of solar cells with an intermediate band of non-zero width and a thermalized electron population. Progress in Photovoltaics. ISSN: 1062-7995. 20 (4). s 431 - 441. doi:10.1002/pip.1155.
  • Strandberg, Rune (2012). Theoretical efficiency of intermediate band solar cells with overlapping absorption coefficients for various combinations of band gaps. Conference record of the Photovoltaic Specialists Conference. ISSN: 0160-8371. 38s 97 - 100. doi:10.1109/PVSC.2012.6317576.
  • Strandberg, Rune; Reenaas, Turid Worren (2011). Drift-diffusion model for intermediate band solar cells including photofilling effects. Progress in Photovoltaics. ISSN: 1062-7995. 19 (1). s 21 - 32. doi:10.1002/pip.983.
  • Strandberg, Rune; Reenaas, Turid Worren (2011). Optimal Filling of the Intermediate Band in Idealized Intermediate-Band Solar Cells. IEEE Transactions on Electron Devices. ISSN: 0018-9383. 58 (8). s 2559 - 2565. doi:10.1109/TED.2011.2155659.
  • Strandberg, Rune; Reenaas, Turid Worren (2010). Limiting efficiency of intermediate band solar cells with spectrally selective reflectors. Applied Physics Letters. ISSN: 0003-6951. 97 (3). doi:10.1063/1.3466269.
  • Strandberg, Rune; Reenaas, Turid Worren (2009). Photofilling of intermediate bands. Journal of Applied Physics. ISSN: 0021-8979. 105 (12). s 124512-1 - 124512-8. doi:10.1063/1.3153141.
  • Strandberg, Rune (2008). Modelling of the electron concentration in an intermediate band. Conference record of the Photovoltaic Specialists Conference. ISSN: 0160-8371. s 1 - 5. doi:10.1109/PVSC.2008.4922845.
  • Strandberg, Rune; Imenes, Anne Gerd (2023). Efficiency maps for tandem solar cells using high resolution spectral data.
  • Strandberg, Rune; Imenes, Anne Gerd (2022). Production estimates for tandem cells using high resolution spectral data.
  • Strandberg, Rune (2022). Solcellerelatert undervisning og forskning ved UiA.

Sectors

Last changed: 1.03.2024 09:03