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SUMMARY:A Supramolecular Approach to Templating Hybrid Perovskites - Jovan
 a Milic\, University of Fribourg
DTSTART:20201029T140000Z
DTEND:20201029T150000Z
UID:TALK152185@talks.cam.ac.uk
CONTACT:Jan Behrends
DESCRIPTION:Hybrid perovskites have emerged as one of the leading material
 s in photovoltaics due to their remarkable optoelectronic properties and s
 olar-to-electric power conversion efficiencies [1-2]. However\, their limi
 ted stabilities under ambient and operating conditions remain challenging 
 [1-2]. On the contrary\, layered hybrid perovskites based on the assemblie
 s of organic and inorganic components feature superior operational stabili
 ties [3-8]. To this end\, supramolecular chemistry provides a powerful too
 l for controlling hybrid materials by tailoring noncovalent interactions. 
 We demonstrate the utility of this approach through designing molecular mo
 dulators based on fine-tuning various noncovalent interactions [8-11]\, su
 ch as metal coordination [10]\, hydrogen [5\,10] or halogen bonding [9]\, 
 and π-interactions [8]\, among others [11]. Furthermore\, their structure
 -directing (i.e. templating) role has been uniquely assessed by solid-stat
 e NMR spectroscopy and DFT calculations [5-7\,9-11]. As a result\, we obta
 in perovskite solar cells that exhibit superior performances and enhanced 
 operational stabilities [8-11]. Moreover\, the underlying molecular design
  has been extended into creating layered perovskite architectures that ena
 ble further control through templating effects [3-7]. This has been invest
 igated by using a combination of techniques to unravel the design principl
 es and exemplify the utility of supramolecular chemistry in advancing phot
 ovoltaics.\n\n\n[1] J. V. Milić et al. Chimia 2019\, 73\, 317\;\n[2] M. G
 raetzel et al. Substantia 2019\, 3\, 27\;\n[3] Y. Li et al. Nano Lett. 201
 9\, 19\, 150\;\n[4] J. V. Milić et al. Adv. Energy Mater. 2019\, 1900284\
 ;\n[5] L. Hong\, et al. Angew. Chem. Int. Ed. 2020\, 59\, 4691\;\n[6] F. J
 ahanbakhshi et al. J. Mater. Chem. A 2020\, 8\, 17732\;\n[7] M. C. Gélvez
 -Rueda et al. Adv. Funct. Mater. 2020\, 2003428\;\n[8] Y. Liu et al. Sci. 
 Adv. 2019\, 5\, eaaw2543\;\n[9] M. A. Ruiz-Preciado et al. J. Am. Chem. So
 c. 2020\, 142\, 1645\n[10] D. Bi et al. Nat. Commun. 2018\, 9\, 4482\n[11]
  T-Z. Su et al. J. Am. Chem. Soc. 2020\, in press.
LOCATION:Details of video conferencing will be distributed nearer the time
 .
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