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Øgaard, Mari
(2024).
Snow losses and snow loss prediction.
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Dahlioui, Dounia & Imenes, Anne Gerd
(2024).
Snow Impact on PV Performance: Review and Investigation Towards Optimum System Design.
Show summary
PV technology faces certain challenges in cold climates such as snow and ice acting as barriers, obstructing light from reaching the cells, but also opportunities for increased albedo during snowy winters. This work presents two sections highlighting :
▪ A review of the impact of snow on PV performance focusing on the challenges and opportunities posed by snow accumulation.
▪ Distribution of snow losses across various PV technologies and climate zones, as reported in literature.
▪ Analysis and classification of factors influencing snow losses.
▪ Description of snow soiling process.
▪ Parametric analysis of energy yield and snow losses to tilt angle and ground coverage ratio through production modelling using Solar Advisor Model (SAM) for a case study in Grimstad
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Kolås, Tore
(2023).
Coloured PV modules based on optical interference coatings.
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Kolås, Tore; Røyset, Arne Karstein; Nordseth, Ørnulf & You, Chang Chuan
(2023).
Predicting and optimising the performance of coloured solar cell modules based on interference coatings.
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Aßmann, Nicole; Sondenå, Rune; Hammann, Benjamin; Kwapil, Wolfram & Monakhov, Eduard
(2023).
Reducing Time and Costs of FT-IR Studies of the Ef-fect of SiNx, Dopants, and Emitter on Hydrogen Spe-cies in Si Wafers and Solar Cell Structures.
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Nilsen, Ola
(2023).
MLD as a Sandbox for Photoactive Hybrid Materials.
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Lysne, Hogne; Brakstad, Thomas Vågenes; Kildemo, Morten & Reenaas, Turid Dory
(2023).
pyPLD: Phyton library for tailoring thickness and composition of PLD thin films.
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Sund, Steinar Steinkopf & Kolås, Tore
(2022).
Store fordeler med med solceller på fasaden.
Fremtidens Byggenæring (internett).
3,
p. 159–162.
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Kolås, Tore
(2022).
Hva er fremtiden i bygningsintegrerte solceller?
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Imenes, Anne Gerd
(2022).
The Terawatt challenge: The key role of PV monitoring.
Show summary
As the installation of new PV capacity continues to grow at a rapid rate worldwide, expected to rise from today’s 4% of the global electricity production to almost 15% by 2030, the value of and need for PV monitoring will arguably increase in a corresponding manner. Monitoring data represent the main source of information for the evaluation of economic profitability, system operation strategies, and environmental sustainability of PV power systems. This work will discuss the need for PV monitoring towards the Terawatt transition, including important international work on PV monitoring and databases, standards and guidelines for methods and equipment, data requirements of different user groups, challenges of data access and data quality, further work needed, and consideration of trends for future data collection from various sources of PV monitoring data and as it crosses borderlines with health inspection and diagnostic tools. Examples of the collection and sharing of data as part of collaborative work in the COST Action PEARL PV on Performance and Reliability of PV Systems will be given.
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Kolås, Tore; Røyset, Arne Karstein; Nordseth, Ørnulf; You, Chang Chuan; Matusiak, Barbara Szybinska & Xiang, Changying
(2021).
Colour and gloss of PV-modules for Building Integration.
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Weiser, Philip Michael; Søndenå, Rune & Monakhov, Eduard
(2021).
Evolution of hydrogen-related defects in float zone-grown silicon wafers under dark annealing: resistivity change vs. FT-IR.
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Selj, Josefine Helene Krogh
(2021).
Solenergi i Norge.
[Internet].
Norsk Klimastilftelse, Klimakvarter.
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Selj, Josefine Helene Krogh
(2021).
Dette er solenergi.
[Internet].
Solklyngen Podcast.
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Selj, Josefine Helene Krogh
(2021).
Strømprisen til værs.
[TV].
NRK.
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Langørgen, Amanda; Karsthof, Robert Michael; Weiser, Philip Michael; Cavani, Olivier; Grasset, Romain & Frodason, Ymir Kalmann
[Show all 8 contributors for this article]
(2021).
Steady-state Photocapacitance Spectroscopy of Intrinsic Defects in Electron-Irradiated β-Ga₂O₃.
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Røyset, Arne Karstein; Kolås, Tore; Ulyashin, Alexsander G. & Rudzikas, Matas
(2021).
Efficiency Loss in Coloured Photovoltaics: Estimating the Contribution from Reflection Loss and Absorption Loss.
Show summary
Building integrated photovoltaics (BIPV) offers efficient utilisation of land area and local renewable energy generation. Attractive aesthetic aspects and efficient energy generation are important drivers for market acceptance of solar panels as building elements. Coloured modules improve aesthetic aspects at the expense of efficiency loss and increased cost. For a given lightness and colour, a minimum energy loss due to reflected photons is unavoidable. Additional efficiency loss may come from parasitic absorption in the colour providing layers and from unwanted reflection and absorption in the nonvisible near infrared wavelength range. In this paper we present a novel method to identify the different loss contributions: visible reflection loss, near infrared reflection loss, and parasitic absorption loss. The methodology is applied to silicon solar cells where colouration is introduced by interference from a thin indium tin oxide layer on top of the SiNx:H antireflection coating. The method presented here will be a useful tool to optimize efficient colouring of solar cells.
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Lysne, Hogne; Brakstad, Thomas Vågenes; Di Sabatino Lundberg, Marisa; Inzani, Katherine; Kildemo, Morten & Selbach, Sverre Magnus
[Show all 8 contributors for this article]
(2021).
Pulsed laser deposition of doped TiO2 thin films with lateral composition gradients.
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Dahl-Hansen, Runar Plunnecke; Stange, Marit Synnøve Sæverud & Ulyashin, Alexander G.
(2021).
Stress and microstructure in Si films by high-rate e-beam.
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Stange, Marit Synnøve Sæverud; Dahl-Hansen, Runar Plunnecke; Sunde, Tor Olav Løveng & Ulyashin, Alexander G.
(2021).
High-Rate Deposition of Epitaxial Silicon by E-beam Evaporation.
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Kolås, Tore
(2019).
Efficiency of coloured and transparent PV.
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Lysne, Hogne; Ristola, Markus Joel Benjamin; Sørhaug, Jørgen Andre; Di Sabatino Lundberg, Marisa; Holmestad, Randi & Reenaas, Turid Dory
(2019).
Tungsten doped silicon for intermediate band solar cells.
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Stalheim, Helene Eikaas; Burud, Ingunn; Olsen, Espen & Mehl, Torbjørn
(2019).
Detecting oxygen related defects such as thermal donors in Czochralski silicon cross-sections using.
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Hanson, Jens & Chasanidou, Dimitra
(2019).
The innovation system for solar photovoltaics in Norway: Exploring policy needs.
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Kolås, Tore & Røyset, Arne Karstein
(2018).
Efficiency of coloured BIPV.
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Wyller, Guro Marie; Preston, Thomas; Klette, Hallgeir; Nordseth, Ørnulf; Skare, Marte Orderud & Marstein, Erik Stensrud
(2018).
Application of GC-MS Analysis to Monosilane
Pyrolysis for Production of Solar Grade Silicon.
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Wyller, Guro Marie; Preston, Thomas; Skare, Marte Orderud; Klette, Hallgeir; Geetha, Anjitha Sarachandra Kumar & Marstein, Erik Stensrud
(2018).
Exploring thermal pyrolysis of monosilane through gas chromatography-mass spectrometry measurements of higher order silanes.
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Paudyal, Basant Raj; Imenes, Anne Gerd & Sætre, Tor Oskar
(2018).
Review of Guidelines for PV Systems Performance and Degradations Monitoring.
Show summary
The recent growth in the PV system deployment and the higher scale of their production make it necessary to pay more attention towards the performance of those systems. System monitoring will provide the status of the systems showing possible degradations and any impending system failures. It also helps with maintaining system quality and ensuring the optimal performance of the system for its lifetime. COST Action PEARL PV aims to formulate such monitoring guidelines for the PV systems applicable for all types of PV technologies, depending upon the end use and duration of the monitoring need. The objective of the present paper is to quantify and provide a review of the guidelines and standards for monitoring of PV systems performance and degradation in practice, and also some results of preliminary work done regarding important information needed to be included in the monitoring guideline.
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Stange, Marit Synnøve Sæverud; Sunde, Tor Olav Løveng; Dahl-Hansen, Runar Plunnecke; Azar, Amin Shahrestani; Graff, Joachim Seland & Nørgaard, Jeppe
[Show all 7 contributors for this article]
(2018).
EPITAXIAL GROWTH OF SILICON BY ELECTRON BEAM EVAPORATION DEPOSITION.
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Lysne, Hogne; Hauge, Heidi Sæverud; Nematollahi, Mohammadreza; Di Sabatino Lundberg, Marisa; Holmestad, Randi & Reenaas, Turid Dory
(2018).
Hyperdoped silicon for intermediate band solar cells.
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Lysne, Hogne; Hauge, Heidi Sæverud; Nematollahi, Mohammadreza; Di Sabatino Lundberg, Marisa; Holmestad, Randi & Reenaas, Turid Dory
(2018).
Hyperdoped silicon for intermediate band solar cells.
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Azarov, Alexander; Wendler, Elke; Hallen, Anders; Monakhov, Edouard & Svensson, Bengt Gunnar
(2017).
Defect interaction in ZnO investigated by sequential implantation of ions and subsequent annealing.
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Azarov, Alexander & Svensson, Bengt Gunnar
(2017).
Ion beam modification of wide bandgap semiconductors.
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Azarov, Alexander; Wendler, Elke; Monakhov, Edouard & Svensson, Bengt Gunnar
(2017).
Effect of pre-existing extended defects on radiation defect dynamics in ZnO implanted with N at room and cryogenic temperatures.
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Monakhov, Edouard; Bathen, Marianne Etzelmüller; Bergum, Kristin; Sky, Thomas Neset & Weiser, Philip Michael
(2017).
Omvisning for the National Natural Science Foundation of China.
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Safarian, Jafar
(2017).
Metallurgical processes for solar grade silicon feedstock production
.
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Lysne, Hogne; Reenaas, Turid Dory; Sabatino, Marisa Di & Holmestad, Randi
(2023).
Design and fabrication of (Cr + N) co-doped TiO2 films with a continuous compositional spread.
NTNU.
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Larsen, Sigrid Langholm & Imenes, Anne Gerd
(2021).
Investigation of Outdoor Performance of Silicon Photovoltaic
Modules at Different Installation Angles.
Universitetet i Agder.
Show summary
The objective of this master thesis is to analyse and compare the performance of two different PV technologies mounted at different tilt angles and orientations. The PV modules are installed on the roof of the J5 building in the University of Agder, located in Grimstad, Norway. The analysis was carried out by comparing 13 months of measured data (from March 2020 to March 2021).
The technologies assessed are mono crystalline silicon and poly crystalline silicon, mounted at a tilt angle of 10 deg East/West, 45 deg South and 90 deg South. Data recorded include global and diffuse horizontal irradiance, irradiance in the plane-of-array and other weather parameters, PV module
temperature, DC output power, current and voltage for the PV modules. To assess the performance, performance ratio, temperature corrected performance ratio and specific yield has been calculated for all modules on a monthly basis. Results give the DC specific yield for 10 deg tilt modules between 920 - 984 kWh/kWp. The two modules mounted on the 45 deg tilt rack and the BIPV modules all had low data availability due to missing data points. To account for this data are estimated for the missing data point using linear regression. The DC specific yield before estimating data for
missing data points for 45 deg are 988 kWh/kWp (mono c-Si 45 deg), 1050 kWh/kWp (poly c-Si 45 deg), 762 kWh/kWp (BIPV normal), and 760 kWh/kWp (BIPV grey). Comparing the two PV technologies at different tilt angles and orientations, there is not detected a substantial difference in performance
between the East- and West-facing modules at a 10 deg tilt. The PR for the higher tilted modules are on average slightly better than for the 10 deg tilt modules. The best indication of module performance in the various installation angles are when estimating output power for missing data. From these
results the PRDC values of the 10 deg tilt modules are in the range 0.88 - 0.90 (mono c-Si E/W) and 0.88-0.92 (poly c-Si W/E), while for the 45 deg tilt modules the values are 0.92 (mono c-Si) and 0.95 (poly c-Si), and for both the normal and grey BIPV modules at 90 deg tilt the value is 0.94.
PVsyst software is used to simulate five mono c-Si modules at 10 deg tilt and East-facing. This is because in the system at UiA five modules are connected in a string to one inverter. Design parameters such as module tilt, orientation, shading and inter-row spacing is defined to obtain as accurate simulation as possible. The results show a good correlation between simulation and calculated results. AC energy output for the simulation was 1436 kWh/year, compared to DC
output for the real system at 1451 kWh/year. PVsyst simulation can be used to investigate other
installation angles and orientations than the ones analysed in this work.
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Hanson, Jens; Chasanidou, Dimitra & Normann, Håkon Endresen
(2021).
The Norwegian solar energy innovation system.
NTRANS - Norwegian Centre for Energy Transition Strategies.
ISSN 978-82-93863-03-8.
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Sortland, Øyvind Sunde; M'hamdi, Mohammed & Jomâa, Moez
(2019).
Assessment of feature engineering and long short-term memory for structure loss identification from process data in monocrystalline silicon growth by the Czochralski method.
Department of Materials Science and Engineering, NTNU.
Full text in Research Archive
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Mengyi, Zhu & Safarian, Jafar
(2017).
Silicon purification by leaching.
NTNU.
Show summary
The development of low-cost solar grade silicon (SoG-Si) has received worldwide attentions from both academia and industry in recent. This report is focused on the purification of silicon by acid leaching technique, with emphasis on the acid leaching principle, leaching of doped Si by different alloying refiner metals, and effects of processing parameters on the impurities removal efficiency. Compared with direct leaching of Metallurgical grade silicon (MG-Si), the doping method shows better leaching efficiency, which is depending on the selected refiner metal.