Highly Tunable Colloidal Perovskite Nanoplatelets through Variable Cation, Metal, and Halide Composition

Colloidal perovskite nanoplatelets are a promising class of semiconductor nanomaterials-exhibiting bright luminescence, tunable and spectrally narrow absorption and emission features, strongly confined excitonic states, and facile colloidal synthesis. Here, we demonstrate the high degree of spectral tunability achievable through variation of the cation, metal, and halide composition as well as nanoplatelet thickness. We synthesize nanoplatelets of the form L2[ABX3]n-1BX4, where L is an organic ligand (octylammonium, butylammonium), A is a monovalent metal or organic molecular cation (cesium, methylammonium, formamidinium), B is a divalent metal cation (lead, tin), X is a halide anion (chloride, bromide,…

• NS
  National Science Foundation

  Awards: FP7/2007-2013, DMR-08-19762
• UD
  U.S. Department of Energy

  Awards: DE-SC0001088, DMR-08-19762
• EC
  European Commission

  Awards: FP7/2007-2013, 2007-2013, FP7/2007, 622630
• DF
  Directorate-General for Research and Innovation

  Award: 622630
• OO
  Office of Science

  Award: DE-SC0001088
• MR
  Materials Research Science and Engineering Center, Harvard University
• DO
  Division of Materials Research

  Award: DMR-08-19762
• BE
  Basic Energy Sciences

  Award: DE-SC0001088