Post-synthetic halide conversion and selective halogen capture in hybrid perovskites.

ABSTRACT: Reaction with halogen vapor allows us to post-synthetically exchange halides in both three- (3D) and two-dimensional (2D) organic-inorganic metal-halide perovskites. Films of 3D Pb-I perovskites cleanly convert to films of Pb-Br or Pb-Cl perovskites upon exposure to Br₂ or Cl₂ gas, respectively. This gas-solid reaction provides a simple method to produce the high-quality Pb-Br or Pb-Cl perovskite films required for optoelectronic applications. Reactivity with halogens can be extended to the organic layers in 2D metal-halide perovskites. Here, terminal alkene groups placed between the inorganic layers can capture Br₂ gas through chemisorption to form dibromoalkanes. This reaction's selectivity for Br₂ over I₂ allows us to scrub Br₂

SUBMITTER: Solis-Ibarra D 

PROVIDER: S-EPMC5707501 | biostudies-literature | 2015 Jul

REPOSITORIES: biostudies-literature