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SUMMARY:STEM studies of hybrid perovskite solar cells - Caterina Ducati (U
 niversity of Cambridge)
DTSTART:20200825T090000Z
DTEND:20200825T092000Z
UID:TALK150508@talks.cam.ac.uk
CONTACT:Joseph Nelson
DESCRIPTION:Hybrid perovskites have attracted attention for their promisin
 g behaviour in optoelectronics. LEDs and solar cells based on these nanoma
 terials can be produced and processed at low costs\, and can achieve power
  conversion efficiencies. Hybrid perovskites tend to be sensitive to the e
 nvironment\, as well as applied electric fields\, and can rapidly degrade 
 due to ionic migration – which in turn affects device performance and st
 ability. Although much progress has been made on establishing the impact o
 f different stimuli on their performance\, the nanoscale behaviour of thes
 e composite devices is still under investigation. We apply scanning transm
 ission electron microscopy (STEM) techniques to study the local variation 
 in composition and structure due to fabrication processes and external sti
 muli\, with a combination of dark field imaging and energy dispersive X-ra
 y spectroscopy (EDX).\n\nWe developed approaches to study hybrid nanostruc
 tured devices\, including FIB device cross-sectioning\, compositional mapp
 ing and multivariate statistical analysis for low electron dose acquisitio
 n to reduce beam damage effects on sensitive materials.\n\n*This talk will
  be held online using Zoom. Please "register your email address here":http
 s://forms.gle/9Rpf2BekocwLpmHD9 to receive Zoom links via email.*\n\n*Work
 shop website*: https://www.mtg.msm.cam.ac.uk/events/msm-aimr-joint-online-
 workshop-2020
LOCATION:Online - Zoom
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