Browsing NTNU Open by Author "Gaspar, Guilherme Manuel Morais"
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Copper in compensated p- and n-type Czochralski silicon: Diffusivity, influence on the majority charge carrier density and mobility
Gaspar, Guilherme Manuel Morais; Modanese, Chiara; Bernardis, Sarah; Enjalbert, N.; Arnberg, Lars; Dubois, S.; Di Sabatino Lundberg, Marisa (Peer reviewed; Journal article, 2022)Copper contamination risks are present throughout the whole crystalline silicon solar cell process flow, namely during ingot growth processes using recycled feedstock, wafer sawing and metallisation. Copper is a fast-diffusing ... -
Impact of thermal history on defects formation in the last solid fraction of Cz silicon ingots
Lanterne, Adeline Anne; Gaspar, Guilherme Manuel Morais; Haave, Bjørn; Jomâa, Moez; Søndenå, Rune; Hupfer, Alexander; Hu, Yu; Sabatino, Marisa Di (Journal article; Peer reviewed, 2018)For the first time, the impact of the tail detachment on the quality of the last solid fraction of a Czochralski silicon ingot body is reported. Simulations of the thermal history were performed on CGSim software and showed ... -
N-type Czochralski silicon solidification: Oxygen- and copper-related defects formation
Gaspar, Guilherme Manuel Morais (Doctoral thesis at NTNU;2016:68, Doctoral thesis, 2016)This PhD work was focused on the formation of oxygen- and copper-related defects in ntype Czochralski silicon for solar cells. These defects are a very important source of material and solar cell performance degradation, ...