Our Chemistry seminars are back. Please find the information of our next speaker below:
Speaker: Dr. Miguel Anaya, Cambridge University
Title: Lessons from multimodal microscopy for halide perovskites
Abstract: Halide perovskites perform remarkably in optoelectronic devices. However, their performance is still not properly understood given they exhibit compositional and structural heterogeneity in addition to large concentrations of deep charge carrier traps in well localized spatial clusters. In this talk, we resolve this paradox revealing that compositional disorder of the perovskite can induce carrier funneling away from deep trap states, improving performance. To do this, we use a series of multimodal microscopy techniques based on synchrotron nanoprobe and optical spectroscopic methods, including hyperspectral and transient absorption microscopy, correlated at the nanoscale. Finally, I will show how our quantitative optical microscopy allow us to visualise the degradation paths in perovkite based LEDs and identify routes to mitigate those.
Zoom link:
https://swanseauniversity.zoom.us/j/97039228760?pwd=NTVJTTQrMDFzWSsvODlOOXB0aFdrUT09
Meeting ID: 970 3922 8760
Passcode: seminar
Speaker: Dr. Miguel Anaya, Cambridge University
Title: Lessons from multimodal microscopy for halide perovskites
Abstract: Halide perovskites perform remarkably in optoelectronic devices. However, their performance is still not properly understood given they exhibit compositional and structural heterogeneity in addition to large concentrations of deep charge carrier traps in well localized spatial clusters. In this talk, we resolve this paradox revealing that compositional disorder of the perovskite can induce carrier funneling away from deep trap states, improving performance. To do this, we use a series of multimodal microscopy techniques based on synchrotron nanoprobe and optical spectroscopic methods, including hyperspectral and transient absorption microscopy, correlated at the nanoscale. Finally, I will show how our quantitative optical microscopy allow us to visualise the degradation paths in perovkite based LEDs and identify routes to mitigate those.
Zoom link:
https://swanseauniversity.zoom.us/j/97039228760?pwd=NTVJTTQrMDFzWSsvODlOOXB0aFdrUT09
Meeting ID: 970 3922 8760
Passcode: seminar
