Bruno Ehrler

       AMOLF – The Netherlands

Invited Speakers
Thomas Kirchartz
Forschungszentrum Jülich GmbH, DE, DE
Annamaria Petrozza
CompuNet, Istituto Italiano di Tecnologia (IIT), Genova, IT
Aron Walsh
Imperial College London, United Kingdom, GB
Organize an online seminar

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nanoGe Online Meetup Conference

The Meetup Conference: Origins of Electronic Defects in Halide Perovskites took place on 2nd of April 2020.

The Origins of Electronic Defects in Halide Perovskites was a short online seminar that aimed to promote exchange and discussion around the metal halide perovskites defects tolerance and their influence on solar cell performance.

Metal halide perovskites show very few electronic defects. This observation is surprising because elemental defect levels are in the percent range. This “defect tolerance” has been subject to many studies. However, some electronic defects remain, and now perovskite solar cells are optimized to an extend where their efficiency is limited by these defects, both interfacial and bulk.

In this online seminar we wanted to discuss the state of the art if the structural origin of these defects. For bulk defects we will discuss which structural defects lead to electronic defects? Where in the band do they occur? What is their influence on recombination rates? For interfacial defects we will discuss the influence of different interfaces, why some interfaces are more inert than others, and the role of passivation strategies and tunneling layers.

Finally we will discussed the influence on solar cell performance. How much are current solar cells limited by the defects? Which defects are dominating? How to avoid the defects in real devices?

Topics to be covered by the conference:
  • Structural origin of electronic defects in halide perovskites
  • Nature of electronic defects
  • Bulk vs. interfacial defect states
  • Influence of electronic defects on solar cell performance
  • Strategies to passivate defect states
  • Measurements to quantify defect states
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