Jochen Busam
About
In the production of mc Si solar cells, the contamination by O, C and N from the SiO2 crucible and coating during solidification is insufficiently understood: the reported diffusion coefficients in Si and SiO2 disagree and the system is heterogeneous as it consist of different phases over a wide temperature range.
I try to determine the process parameters by local impurity measurements down to ppb level in ingot and crucible, model the system based on the findings and assess possibilities to reduce impurity levels through variations in the system.
To do that I produce several ingots with coating and crucible of varying purity. The chemical analysis is performed with GDMS, FTIR and other techniques. The electrical properties of Si are determined by lifetime and dislocation density measurements. Modelling is based on COMSOL Multiphysics.
By that, I aim to develop cost efficient improvements to the solidification process that lead to profitable mc Si solar cells with increased efficiency.
Publications
2022
-
Busam, Jochen;
Paudel, Gagan;
Di Sabatino Lundberg, Marisa.
(2022)
Silicon and indium as secondary cathodes for the analysis of solid alumina and sapphire by slow-flow direct-current glow discharge mass spectrometry.
Journal of Analytical Atomic Spectrometry.
volum 37 (1).
Academic article
2021
-
Busam, Jochen;
Stokkan, Gaute;
Muggerud, Astrid Marie F;
Di Sabatino Lundberg, Marisa.
(2021)
Application of 7N In as secondary cathode for the direct current-glow discharge mass spectrometry analysis of solid, fused high-purity quartz.
Journal of Mass Spectrometry.
volum 56 (8).
Academic article
2018
-
Busam, Jochen;
Wenner, Sigurd;
Muggerud, Astrid Marie;
Van Helvoort, Antonius.
(2018)
Structural Characterization of Natural Quartz by Scanning TEM.
Microscopy and Microanalysis.
volum 24.
Academic article
Scientific articles
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Busam, Jochen;
Paudel, Gagan;
Di Sabatino Lundberg, Marisa.
(2022)
Silicon and indium as secondary cathodes for the analysis of solid alumina and sapphire by slow-flow direct-current glow discharge mass spectrometry.
Journal of Analytical Atomic Spectrometry.
volum 37 (1).
Academic article
-
Busam, Jochen;
Stokkan, Gaute;
Muggerud, Astrid Marie F;
Di Sabatino Lundberg, Marisa.
(2021)
Application of 7N In as secondary cathode for the direct current-glow discharge mass spectrometry analysis of solid, fused high-purity quartz.
Journal of Mass Spectrometry.
volum 56 (8).
Academic article
-
Busam, Jochen;
Wenner, Sigurd;
Muggerud, Astrid Marie;
Van Helvoort, Antonius.
(2018)
Structural Characterization of Natural Quartz by Scanning TEM.
Microscopy and Microanalysis.
volum 24.
Academic article
Media
2018
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PosterBusam, Jochen; Wenner, Sigurd; Muggerud, Astrid Marie; Van Helvoort, Antonius. (2018) Characterisation of Beam Sensitive Quartz by Scanning TEM. Scandem 2018 . CEN-DTU/Scandem; Copenhagen. 2018-06-25 - 2018-06-28.
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PosterBusam, Jochen; Wenner, Sigurd; Muggerud, Astrid Marie; Van Helvoort, Antonius. (2018) Characterization of beam sensitive quartz by STEM. Nature Conference Minerals and Materials for a Sustainable Future . NGU, IMA & SINTEF; Trondheim. 2018-09-13 - 2018-09-15.
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PosterBusam, Jochen; Wenner, Sigurd; Muggerud, Astrid Marie; Van Helvoort, Antonius. (2018) Scanning transmission electron microscopy of beam sensitive quartz. EMAG2018 . IoP; Warwick. 2018-07-04 - 2018-07-06.
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PosterBusam, Jochen; Wenner, Sigurd; Muggerud, Astrid Marie; Van Helvoort, Antonius. (2018) Structural Characterization of Natural Quartz by STEM. Microscopy&Microanalysis 2018 . MSA; Baltimore. 2018-08-05 - 2018-08-09.