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SUMMARY:Ferroelectric nanocomposites for enhanced photovoltaic and photoel
 ectrocatalytic solar energy conversion - Professor Joe Briscoe
DTSTART:20231012T141500Z
DTEND:20231012T151500Z
UID:TALK206830@talks.cam.ac.uk
CONTACT:Julie Smith
DESCRIPTION:Huge advances have been made in recent years in solar energy c
 onversion from both established technologies such as silicon to emerging p
 hotovoltaics such as halide perovskites\, and direct solar-to-fuel such as
  photoelectrochemical water splitting and CO2 reduction. Many of these tec
 hnologies are either approaching their fundamental efficiency limits\, or 
 require new approaches to accelerate efficiency improvements. Here\, I wil
 l present our work developing new devices based on ferroelectric-photovolt
 aic and ferroelectric-photocatalyst nanocomposites. Ferroelectrics produce
  a bulk photovoltaic effect (BPVE) that does not require a semiconductor j
 unction therefore can produce above bandgap photovoltages. However they ge
 nerally are poor light absorbers with low charge carrier mobilities. There
 fore we intend to couple the BPVE with efficient photoabsorbers by intimat
 ely combining these materials in nanocomposite films. As a proof-of-concep
 t for this effect we have combined photocatalyst materials such as Fe2O3 w
 ith porous ferroelectrics to efficiently couple the two effects together\,
  demonstrating enhanced photocatalytic activity driven by the ferroelectri
 c polarisation. We have also demonstrated a strain dependence of the BPVE 
 in epitaxial BaTiO3 thin films\, which has implications for optimisation o
 f nanocomposite structures.
LOCATION:Goldsmiths 2 &amp\; https://us06web.zoom.us/j/81688365420?pwd=b3R
 pdHgxNVhWbWQrbXluMUxYNWVtQT09 Meeting ID: 816 8836 5420 Passcode: 047859
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