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SUMMARY:Hybrid Organometal Trihalide Perovskite Solar Cells
DTSTART:20131023T164500
DTEND:20131023T184500
DTSTAMP:20260428T015238Z
UID:22a9316657e8b560f4530352c6fff07816ea5f82aa30bbb609b052e3
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Henry J. Snaith\, Oxford University\nBio: Dr. Snaith under
 took his PhD at the University of Cambridge under the supervision of Profe
 ssor Sir Richard Friend\, working on polymer blend photovoltaic diodes. Hi
 ghlights of this work include greatly enhancing the understanding of charg
 e generation and collection from such devices\, and developing routes to m
 aximize the voltage generated.\nFollowing his PhD Dr. Snaith spent two yea
 rs at the École Polytechnique Fédérale de Lausanne (EPFL) as a post doc
  working under Prof. Michael Grätzel. His research at EPFL focused on dev
 eloping the technology behind and understanding the operation of solid-sta
 te DSCs. He returned to the Cavendish Laboratory in Cambridge to take up a
  Junior Research Fellowship for Clare College in 2006\, where he continued
  to independently develop and study the solid-state DSC\, pushing the sola
 r power conversion efficiency to over 5%.\nIn October 2007 he was appointe
 d as an RCUK fellow/lecturer in photovoltaics at the University of Oxford\
 , where he now leads a research group of 15 scientists primarily focused o
 n advancing the fundamental understanding and operation of solid-state DSC
 s and hybrid solar cells. His current research is heavily focused on devel
 oping new material nanostructures for dye-sensitized and hybrid solar cell
 s and understanding and controlling the physical processes occurring at el
 ectronic interfaces.\nCombining both ultimately low cost materials and pro
 duction with a high efficiency solar technology has thus far been elusive.
  Low cost materials\, such as organics and oxides\, tend to suffer from fu
 ndamental energy losses required to separate excitons and collect free cha
 rge carriers in electronically disordered semiconductors. This energy loss
 \, can be defined by the difference between the optical band gap and the o
 pen-circuit voltage\, and is typically 0.65 to 0.8 eV for organics\, dye-s
 ensitized and a-Si\, but for a “perfect” single junction solar cell th
 e theoretical minimum losses\, as determined by the Shockley–Queisser li
 mit are in the region of 0.3 to 0.25 eV\, which is achieved for the highes
 t efficiency PV technology\, GaAs. Recently we have reported a new type of
  solution processed thin-film solar cell based on a metal-organic perovski
 te absorber which overcomes most of these fundamental losses\, and deliver
 s both high efficiency and promise for ultimate low cost. Here I will pres
 ent recent advances with perovskite based solar cells\, both in understand
 ing of perovskite crystallization and film formation\, fundamental photo p
 hysical operation\, and in understanding and enhancing solar cell performa
 nce.
LOCATION:CH G1 495 https://plan.epfl.ch/?room==CH%20G1%20495
STATUS:CONFIRMED
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