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SUMMARY:Halide Double Perovskites: The search for environmentally benign a
 lternatives to the lead-based materials - Patrick M. Woodward\, Department
  of Chemistry and Biochemistry\, Ohio State University
DTSTART:20171123T153000Z
DTEND:20171123T160000Z
UID:TALK95833@talks.cam.ac.uk
CONTACT:Sharon Connor
DESCRIPTION:The AMX3 (A = Cs\, Rb\, CH3NH3\; M = Pb\, Sn\, Ge\; X = I\, Br
 \, Cl) halide perovskites are an amazing class of materials. Their electri
 cal and optical properties are comparable to conventional compound semicon
 ductors\, which makes them potentially suitable for many applications\, in
 cluding solar cells where power conversion efficiencies exceeding 20% have
  been realized. Unlike conventional semiconductors halide perovskites can 
 be prepared from solution\, which opens up an entirely new realm of proces
 sing conditions. In addition\, the electronic structure and optoelectronic
  properties of halide perovskites can be tuned through distortions of the 
 crystal structure.  In this talk I will discuss our work on Cs1−xRbxPbBr
 3 and Cs1−xRbxPbCl3 solid solutions\, as well as our efforts to synthesi
 ze and characterize new halide double perovskites with compositions Cs2BB
 ′X6 (B = Ag\, Na\; B′ = Bi\, Sb\, In\; X = Cl\, Br).  Drawing from our
  work\, as well as others\, I will offer an experimentalists perspective o
 n the forces stabilize the perovskite structure among halides\, and the ef
 fect of structural distortions on the electronic structure and optical pro
 perties of these materials. 
LOCATION:TCM Seminar room  (530)\, Cavendish Laboratory\, Department of Ph
 ysics
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