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SUMMARY:IMX Talks - Watching\, Understanding\, and Controlling the Formati
 on of Functional Materials
DTSTART:20210317T160000
DTEND:20210317T170000
DTSTAMP:20260413T220708Z
UID:0061e2819f3519114d7be9f893474f36a0f44ecd300e267f53056e2c
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Carolin M. Sutter-Fella\, Lawrence Berkeley National Labor
 atory\, United States\nMaterial synthesis is a very important aspect in hu
 man kinds endeavor to discover and create new materials for energy applica
 tions. In order to make materials with desired functions it is advantageou
 s to know how these functions relate to structure\, synthetic variables\, 
 arrangement of atoms and molecules and how functions evolve during synthes
 is.\n\nThe class of hybrid halide perovskite semiconductors has gained sig
 nificant research attention due to its potential as highly efficient and c
 heap material for energy applications such as in photovoltaics\, light emi
 tting devices\, and photodetectors. In this regard\, the field of halide p
 erovskites moves towards more and more complex compositions enabling impro
 ved device performance and stability. Most of the improvements however\, a
 re chemical intuition driven or achieved through empirical optimization of
  processing conditions. Establishing the relationships between synthesis c
 ondition and film properties will enable deliberate control of synthesis p
 arameters and increase reproducibility. I will discuss the formation of ha
 lide perovskites from colloidal precursors including the initial stages of
  formation and the physicochemical evolution of properties via polydispers
 e nanocrystal nucleation and solvent-complexation. We identify for example
  how the Pb salt influences the crystallization pathway\, how it can templ
 ate morphology\, and how additives can aid room temperature processing.\n\
 nIn this talk I will introduce a new multimodal in situ platform that we d
 eveloped together with the Advanced Light Source (ALS) which allows for si
 multaneous optical as well as structural characterization of chemical solu
 tion synthesis. By correlating diffraction and photoluminescence (PL) meas
 urements\, I will show how in situ PL can reveal subtle changes throughout
  different synthetic steps of halide perovskites including nuclei formatio
 n\, surface passivation\, and the onset of film decomposition.\nBio: Carol
 in M. Sutter-Fella is a Staff Scientist in the Molecular Foundry at the La
 wrence Berkeley National Laboratory (LBNL). Before joining the Foundry Car
 olin built her research program enabled by LBNL’s Glenn Seaborg Early Ca
 reer Fellowship (2017). Her research focuses on synthesis of functional ma
 terials and understanding synthesis-property relationships using multimoda
 l in situ techniques as well as development of novel in situ capabilities.
  She received her Ph.D. in Electrical Engineering from ETH Zürich\, Switz
 erland\, in 2014 where she worked on the synthesis of chalcogenide thin fi
 lm solar cells. Before Carolin joined LBNL\, she was a Swiss NSF postdocto
 ral fellow at UC Berkeley.\n 
LOCATION:https://epfl.zoom.us/j/85053234227
STATUS:CONFIRMED
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