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SUMMARY:Mesoscopic photosystems for the generation of electricity and fuel
 s from sunlight 
DTSTART:20160317T160000
DTEND:20160317T170000
DTSTAMP:20260427T200309Z
UID:1fdf73ce2d51e1fd7e92e1e49584f493754734fa887dd8b1d868c344
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Michael Graetzel\, EPFL\nBio: Professor of Physical Chem
 istry at the Ecole Polytechnique Fédérale de Lausanne\, he directs there
  the Laboratory of Photonics and Interfaces. He pioneered research in the 
 field of energy and electron transfer reactions in mesoscopic systems and 
 their use for the generation of electricity and fuels from sunlight as wel
 l as the storage of electric power in lithium ion batteries.\nAuthor of se
 veral books and some 1200 publications that received some 180’000 citati
 ons and with an ISI h-factor of 195 he is one of the 3 most highly cited c
 hemists in the world.  His recent awards include the Paracelsus Prize of 
 the Swiss Chemical Society\, the King Feisal International Science Prize\,
  the Samson Prime Minister’s Prize for Innovation in Alternative Fuels\,
  the First Leigh-Ann Conn Prize in Renewable Energy\, the Albert Einstein 
 World Award of Science\, the Marcel Benoist Prize\, the Paul Karrer Gold M
 edal\, the Gutenberg Research Award\, the Millennium Technology Grand Priz
 e\, and the Balzan Prize. He graduated as Doctor of natural science from t
 he Technical University of Berlin and received 10 honorary doctors degrees
  from Asian and European Universities.\nHe is a member of the Swiss Chemic
 al Society and an elected member of the German Academy of Science (Leopold
 ina) as well as Honorary member of the Israeli Chemical Society\, the Bulg
 arian Academy of Science and the Société Vaudoise de Sciences Naturelles
 . Recently he was named Fellow of the Max Planck Society and Honorary Fell
 ow of the Royal Society of Chemistry (UK).\nMesoscopic photovoltaics have 
 emerged as credible contenders to conventional p-n junction photovoltaics 
 [1-3]. Mimicking light harvesting and charge carrier generation in natural
  photosynthesis\, dye sensitized solar cells (DSCs) were the first to use 
 three-dimensional nanocrystalline junctions for solar electricity producti
 on\, reaching currently a power conversion efficiency (PCE) of over 14% in
  standard air mass 1.5 sunlight. Meanwhile\, large-scale production and co
 mmercial sales have been launched on the multi-megawatt scale. Recently\, 
 the DSC has engendered the meteoric rise of perovskite solar cells (PSCs) 
 [4\,5]. Today’s state of the art devices employ metal halide perovskite 
 of the general composition ABX3 as light harvesters\, where A stands for m
 ethylammonium\, formamidinium or caesium\, B denotes lead or tin and X iod
 ide or bromide. Carrier diffusion lengths in the 100 nm - micron range hav
 e been measured for solution-processed perovskites.\nWe have attained a ce
 rtified conversion efficiency (PCE) of 21 %\, which is a new world record 
 for PSCs exceeding the PCE of polycrystalline silicon solar cells. These p
 hotovoltaics show intense electro-luminesence matching the external quantu
 m efficiency of silicon solar cells. and Voc values close to 1.2 V for a .
 55 eV band gap material. This renders perovskite-based photosystem very at
 tractive for applications in tandem cells and for generation of fuels from
  sunlight mimicking natural photosynthesis [6\,7].
LOCATION:EPFL Valais Wallis/Zeuzier conference room
STATUS:CONFIRMED
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