Publications by authors named "Shona McNab"
Hole-Selective SiN and AlO Tunnel Nanolayers for Improved Polysilicon Passivating Contacts.
ACS Appl Energy Mater
November 2024
A highly efficient hole-selective passivating contact remains the crucial step required to increase the efficiency of polysilicon-based Si solar cells. The future development of solar modules depends on a device structure that can complement the electron-selective tunnel oxide passivating contact with an equivalent hole-selective contact. We investigate plasma enhanced chemical vapor deposited (PECVD) SiN and atomic layer deposited AlO as alternative nanolayers for the passivation layer in polysilicon tunnel contacts.
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- * The selectivity of the TiO layers is influenced by the oxidation process and the choice of titanium precursor, allowing for tailored band bending that promotes charge separation in crystalline silicon solar cells.
- * Investigations reveal that the unique properties of the TiO layers stem from the fixed negative charges generated during their deposition, emphasizing the importance of a thin silicon oxide layer at the interface for chemical passivation and overall efficiency.