Browsing Brage NMBU by Author "Mehl, Torbjørn"
Now showing items 1-14 of 14
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Defect related radiative recombination in mono-like crystalline silicon wafers
Bergan, Simen (Master thesis, 2016-08-31)The aim of this work was to investigate defect related luminescence emission in four mono-like silicon wafers. The seed-assisted silicon ingot is built by six Czochralski silicon slabs, with nine seed junctions. The ... -
Defects in multicrystalline Si wafers studied by spectral photoluminescence imaging, combined with EBSD and dislocation mapping
Mehl, Torbjørn; Di Sabatino Lundberg, Marisa; Adamczyk, Krzysztof; Burud, Ingunn; Olsen, Espen (Journal article; Peer reviewed, 2016) -
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 ... -
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. ... -
Injection intensity-dependent recombination at various grain boundary types in multicrystalline silicon solar cells
Fruhauf, F; Altermatt, PP; Luka, T; Mehl, Torbjørn; Deniz, H; Breitenstein, O. (Peer reviewed; Journal article, 2018) -
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) -
Karakterisering av multikrystallinske solceller ved bruk av hyperspektral avbildning
Mehl, Torbjørn (Master thesis, 2014-09-10)Hyperspektral avbildning sammen med bruk av bildebehandling og statistiske modeller er en metode som er mye brukt for å undersøke biofysiske prosesser og miljørettede systemer. Metoden har vist seg også å kunne brukes til ... -
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 ... -
Oxygen-related defects in n-type Czochralski silicon wafers studied by hyperspectral photoluminescence imaging
Mehl, Torbjørn; Burud, Ingunn; Letty, Elenore; Olsen, Espen (Journal article; Peer reviewed, 2017) -
Spectral Characteristics and Spatial Distribution of Thermal Donors in n-Type Czochralski-Silicon Wafers
Olsen, Espen; Helander, Malin Iris; Mehl, Torbjørn; Burud, Ingunn (Peer reviewed; Journal article, 2020) -
Study of changes in PL spectrum from defects in PERC solar cells with respect to letid
Mehl, Torbjørn; Luka, Tabea; Lausch, Dominik; Burud, Ingunn; Olsen, Espen (Peer reviewed; Journal article, 2019)Illumination at elevated temperature may cause an efficiency loss of more than 10 %rel. in mc-PERC cells. In this study, we have looked for changes in the photoluminescence spectrum of mc-PERC cells before and after light ... -
A study of the light and elevated temperature induced degradation in p-type multicrystalline PERC wafers with hyperspectral imaging
Svebestad, Rasmus (Master thesis, 2020)Since 2012 a lot of research has been done to understand the phenomenon of light and elevated temperature induced degradation (LeTID), which can limit the efficiency of a solar cell by as much as 20%. In this study LeTID ... -
The Effect of Pull Speed and Heat Treatment on Thermal Donors in Czhocralski Silicon
Olsen, Espen; Mehl, Torbjørn; Stalheim, Helene Eikaas; Juel, Mari; Søndenå, Rune; Burud, Ingunn (Peer reviewed; Journal article, 2021)