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Physics Seminar

Electron microscopy of hybrid perovskites - chemical analysis and dynamic degradation studies

Speaker: Dr Giorgio Divitini (University of Cambridge)
Date: Wednesday 14 October 2020
Time: 15:00
Venue: Zoom

Electron microscopy has been used very extensively for the analysis of materials for energy applications. Due to their instability, various classes of such materials have proven very challenging to analyse – for example, hybrid perovskite solar cells and battery materials. In our group we have developed transmission electron microscopy-based characterisation routes for beam-sensitive samples, specifically working on several projects around perovskite films and devices, understanding the local chemical environment and the degradation process. We also carried out in situ studies, for example looking at the thermal degradation of perovskite cells and correlating the synthesis process to degradation pathways. The talk will cover some of the work on electron microscopy of hybrid perovskite materials, as well as highlighting some of the facilities in the Department of Materials Science in Cambridge that can be accessed by external users for advanced characterisation using TEM and CathodoLuminescence (CL).