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SUMMARY:Molecular strategies to increase robustness of organic semiconduct
 or thin films for application in photovoltaic and photoelectrochemical dev
 ices - Kevin Sivula EPFL
DTSTART:20200121T140000Z
DTEND:20200121T150000Z
UID:TALK137593@talks.cam.ac.uk
CONTACT:Amita Ummadisingu
DESCRIPTION:As organic semiconductors attract increasing attention to\napp
 lication in diverse fields such as bioelectronics and artificial photosynt
 hesis\, understanding and improving their robust operation in a variety of
  challenging environments is a critical task. In this presentation\, resul
 ts from our lab are highlighted including our development of a morphology 
 control strategy using conjugation-break spacers [1]\, demonstration of me
 lt-processed small-molecule OPVs [2]\,\nand investigations of covalently-l
 inked block[3] and network\npolymers[4]\, which afford tunable charge tran
 sport and solvent tolerance—making them promising for application as cha
 rge-transport interlayers in all-solution processed devices. In addition\,
  the application of bulk-heterojunctions to artificial photosynthesis via 
 photoelectrochemical water splitting[5] will be discussed in terms of the 
 requirements for material stability. In this regard\, our recent work in u
 nderstanding the roles of charge transport and accumulation at the organic
  semiconductor/electrolyte interface has led to significant advances in th
 e stability and performance of organic semiconductor photocathodes for dir
 ect solar water reduction into hydrogen.\n[1]  Adv. Mater. 2015\, 27\, 554
 1.\n[2]  Green Chem. 2018\, 20\, 2218.\n[3]  ACS Macro Lett. 2019\, 8\, 13
 4.\n[4]  Adv. Funct. Mater. 2018\, 28\, 1706303.\n[5]  Adv. Energy Mater. 
 2018\, 1802585.
LOCATION:Raleigh Seminar Room\, Maxwell Centre\, Cavendish Laboratory
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