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MLZ (eng)
Lichtenbergstr.1
85748 Garching
Positron Annihilation Spectroscopy (PAS) is a very sensitive method to reveal the presence of vacancy-related point defects in thin film solar cells. Its depth-range and resolution matches various types of existing and emerging thin film solar cells. We apply Positron annihilation spectroscopy (PAS) to monitor environmental degradation of ZnO/CIGS and of perovskite solar cells. Furthermore, we examine the presence of point defects and near-surface oxidation of thermally annealed RF-sputtered BaSi2 thin films. We show that the positron is a very sensitive probe for the surfaces of semiconductor quantum dots in thin film QD photovoltaic systems. Ab-initio modelling in combination with Positron Annihilation Lifetime Spectroscopy (PALS) provided first-time proof of the presence of the positron surface state underlying the very high sensitivity of positrons to probe surfaces of CdSe quantum dots.
Date | 27.01.2020 |
Time | 14:30 - 15:30 h |
Place | Garching, Germany |
Room | HS 3 (Physics Department) |
Speaker | Dr. Stephan Eijt (Delft University of Technology) |
Organizer | MLZ |
Contact | |
Contact person | Dr. Alexandros Koutsioumpas and Dr. Christian Franz |
URL |
MLZ is a cooperation between:
> Technische Universität München> Helmholtz-Zentrum Hereon > Forschungszentrum JülichMLZ is a member of:
MLZ on social media: