Blar i Brage NMBU på forfatter "Olsen, Espen"
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Forbedring av tørkeprosessen til kakaobønner fra Sørvest-Kamerun ved bruk av solenergi
Bjånes, Emilia Eriksson (Master thesis, 2019)Oppgaven tar for seg tørking av kakaobønner i Sørvest-Kamerun hvor firmaet SunErgy har bygd off-grid solcelleanlegg til landsbyer. Kakaobønnene blir i dette området i dag tørket ved vedfyring noe som fører til et svinn på ... -
The galvanostatic intermittent titration technique for silicon-based li-ion battery anodes : theory and experimental validation
Nysted, Vilde Stueland (Master thesis, 2020)Lithium ion batteries (LIBs) are the battery of choice for a number of applications, and the LIB market is growing rapidly. Good kinetic abilities is important for many applications, such as electric vehicles, grid storage ... -
Hydrolysis of eutectic compositions in the ZnCl2:KCl:NaCl ternary system and effect of adding ZnO
Niazi, Sepideh; Olsen, Espen; Nygård, Heidi S. (Peer reviewed; Journal article, 2020) -
Hydrolysis of eutectic compositions in the ZnCl2:KCl:NaCl ternary system and effect of adding ZnO
Niazi, Sepideh; Olsen, Espen; Nygård, Heidi S. (Peer reviewed; Journal article, 2020) -
Hydrolysis of molten CaCl2-CaF2 with additions of CaO
Olsen, Espen; Hansen, Maria; Nygård, Heidi (Journal article; Peer reviewed, 2017) -
Hyperspectral imaging as a tool for characterization of multicrystalline silicon wafers
Flø, Andreas Svarstad (PhD Thesis;2014:21, Doctoral thesis, 2014)This thesis describes the development of a method for characterization of multicrystalline silicon wafers based on hyperspectral imaging. The aim has been to show the distribution of radiative defects in silicon wafers. ... -
Hyperspectral imaging as a tool to study solar induced photoluminescence from PV modules
Høiaas, Ingeborg Eriksdatter (Master thesis, 2019)The installedsolarphotovoltaic(PV) capacity in the world is increasing and solar PV is becoming a bigger part of the energy mix. Reviewed literature on PV field performance show an average degradation rate of 0.8%/year, ... -
Hyperspectral photoluminescence imaging of defects in solar cells
Burud, Ingunn; Mehl, Torbjørn; Flø, Andreas Svarstad; Lausch, Dominik; Olsen, Espen (Journal article; Peer reviewed, 2016) -
Hyperspectral photoluminescence imaging of silicon wafers and solar cells
Mehl, Torbjørn (PhD Thesis;2018:59, Doctoral thesis, 2018)Hyperspectral photoluminescence imaging is a non-destructive characterization method used to study radiative defects in crystalline silicon wafers and solar cells. It provides both spatial distribution and spectral response ... -
Hyperspectral photoluminescence of thermal donors in two Czochralski crystals pulled at different velocities
Stalheim, Helene Eikaas (Master thesis, 2019)This study has shown that hyperspectral photoluminescence (HSPL) imaging may be used for connecting defect-related luminescence (DRL) signals to electrically active oxygen clusters of thermal donors (TDs). Thus, by using ... -
Increased sensitivity in near infrared hyperspectral imaging by enhanced background noise subtraction
Mehl, Torbjørn; Wyller, Guro Marie; Burud, Ingunn; Olsen, Espen (Journal article; Peer reviewed, 2019)Near infrared hyperspectral photoluminescence imaging of crystalline silicon wafers can reveal new knowledge on the spatial distribution and the spectral response of radiative recombination active defects in the material. ... -
Investigation of resonance structures in optically thin solar cells
Brandsrud, Maren Anna; Blümel, Reinhold; Lukacs, Rozalia; Seim, Eivind; Marstein, Erik Stensrud; Olsen, Espen; Kohler, Achim (Peer reviewed; Journal article, 2021) -
Investigation of veryintenseD3-band emission in multi-crystalline silicon wafers using electron microscopy and hyperspectral photoluminescence imaging
Thøgersen, Annett; Jensen, Ingvild Julie Thue; Graff, Joachim Seland; Ringdalen, Inga Gudem; Almeida Carvalho, Patricia; Mehl, Torbjørn; Zhu, Junjie; Burud, Ingunn; Olsen, Espen; Søndenå, Rune (Peer reviewed; Journal article, 2022) -
Karbonfangst i saltsmelter : effekten av hydrolyse
Hansen, Maria (Master thesis, 2017)Karbonfangst- og lagring (CCS) blir ansett som en uunnværlig teknologi i arbeidet med å redusere de antropogene utslippene av karbondioksid (CO2) til atmosfæren i løpet av de neste tiårene. Blant de ulike metodene for ... -
Karbonfangst i saltsmelter : effekten av sulfatering
Ruud, Nils Amund Rusås (Master thesis, 2018)For å oppnå dype kutt i klimagassutslippene fra stasjonære punktkilder som industri og fossil kraftproduksjon, vil karbonfangst og -lagring (CCS) være nødvending. Per i dag er karbonfangst relativt dyrt og ny teknologi kan ... -
Karbonfangst med metalloksider i saltsmelter : MgO, SrO og CaO som sorbenter
Grøtan, Åshild (Master thesis, 2019)Overgangen fra fossile til fornybare energikilder går ikke raskt nok til at verden oppfyller de ambisiøse klimaforpliktelsene i Parisavtalen, og karbonfangst og lagring (CCS) blir derfor i økende grad anerkjent som et ... -
Kinetics of CO2 Absorption by Calcium Looping in Molten Halide Salts
Nygård, Heidi S.; Tomkute, Viktorija; Olsen, Espen (Journal article; Peer reviewed, 2017) -
Light and elevated temperature induced degradation in multicrystalline silicon wafers studied by hyperspectral photoluminescence imaging
Cappelen, Jon-Fredrik Blakstad (Master thesis, 2019)Light and elevated temperature induced degradation (LeTID) has become a profound problem for the new PERC cells, reducing performance by as much as 16% during operation. The mechanism that governs the degradation is not ... -
Lys og økt temperaturforårsaket degenering i p-type multikrystallinske PERC wafere dopet med bor eller gallium, studert ved hyperspektral avbildning
Berge, Oda Goa (Master thesis, 2021)Lys og økt temperaturforårsaket degenerering (LeTID) er en prosess som kan forårsake ugunstige effekttap i solceller. LeTID har vist seg å være et betydelig problem i bordopet PERC-solceller. Grunnet dette har gallium blitt ... -
Nordic irradiance conditions and the effects on solar module efficiency
Brekke, Tobias Aasprong (Master thesis, 2016-08-29)The purpose of this study is to characterize Nordic irradiance conditions and the effects on solar module efficiency. As of 2015, approximately 1.3 % of the world’s electrical energy production is covered by photovoltaics, ...