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TYC Journal Club: Impact of metastable defect structures on carrier recombination in solar cells
20 June @ 11:00 am – 12:00 pm
Join us on Monday 20 June at 11am on Zoom.
In this meeting, Seán Kavanagh will discuss his work on: Impact of metastable defect structures on carrier recombination in solar cells
The main results:
- We elucidate the additional pathways for electron-hole recombination (the key limiting factor for solar cell efficiencies) introduced by metastable defects in semiconductors.
- We show that metastable defects introduce multiple extra recombination pathways, potentially catalysing the overall recombination rate, depending on the individual kinetics.
- We analyse the general trends in behaviour for electron/hole capture by metastable defects, determining the energetic requirements and conditions under which metastable states are likely to impact recombination.
- Finally, we take tellurium interstitials in CdTe as an illustrative example of this behaviour, where metastable defect structures transform this species from a benign defect centre to a relevant trap state.
Hope to see you all there!
Joining on Zoom:https://ucl.zoom.us/j/708748699?pwd=MU50Wi9Dc1IyTkcxenRBalY5dm9rZz09 Meeting ID: 708 748 699
Vasileios Fotopoulos Fotis