Abstract

Hybrid perovskites have attracted attention for their promising behaviour in optoelectronics. LEDs and solar cells based on these nanomaterials can be produced and processed at low costs, and can achieve power conversion efficiencies. Hybrid perovskites tend to be sensitive to the environment, as well as applied electric fields, and can rapidly degrade due to ionic migration – which in turn affects device performance and stability. Although much progress has been made on establishing the impact of different stimuli on their performance, the nanoscale behaviour of these composite devices is still under investigation. We apply scanning transmission electron microscopy (STEM) techniques to study the local variation in composition and structure due to fabrication processes and external stimuli, with a combination of dark field imaging and energy dispersive X-ray spectroscopy (EDX).

We developed approaches to study hybrid nanostructured devices, including FIB device cross-sectioning, compositional mapping and multivariate statistical analysis for low electron dose acquisition to reduce beam damage effects on sensitive materials.

This talk will be held online using Zoom. Please register your email address here to receive Zoom links via email.

Workshop website: https://www.mtg.msm.cam.ac.uk/events/msm-aimr-joint-online-workshop-2020