Interlayer Triplet Energy Transfer in Dion-Jacobson Two-Dimensional Lead Halide Perovskites Containing Naphthalene Diammonium Cations

Justin Johnson, YunHui Lin

Research output: Contribution to journalArticlepeer-review

23 Scopus Citations

Abstract

Recently, hybrid perovskites have gained attention as sensitizers for molecular triplet generation. Layered, two-dimensional (2D) perovskites are especially well-suited for this purpose because the triplet donor (inorganic framework) and triplet acceptor (organic layer) are self-assembled into adjacent sheets, so that with the appropriate energetics, triplets can be driven across the interface. Here we examine interlayer energy transfer in a series of mixed-halide Dion–Jacobson 2D perovskites containing divalent naphthalene cations. We find that the sensitized phosphorescence in these compounds is dominated by naphthalene triplet excimer emission, but when the inorganic exciton is tuned near resonance with the naphthalene triplet, naphthalene monomer phosphorescence competes with triplet excimer formation. The interlayer energy-transfer process is further revealed by ultrafast transient absorption spectroscopy through kinetic variations in triplet excimer formation times. Ultimately, gaining control over interlayer interactions in 2D perovskites through cation design will help uncover new functions and applications for these materials.
Original languageAmerican English
Pages (from-to)4793-4798
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume12
Issue number20
DOIs
StatePublished - 2021

NREL Publication Number

  • NREL/JA-5900-79805

Keywords

  • 2D perovskite
  • energy transfer
  • excimer
  • low dimensional perovskite
  • perovskite
  • phosphorescence
  • photoluminescence
  • solar-photochemistry
  • triplet energy transfer
  • triplet sensitization

Fingerprint

Dive into the research topics of 'Interlayer Triplet Energy Transfer in Dion-Jacobson Two-Dimensional Lead Halide Perovskites Containing Naphthalene Diammonium Cations'. Together they form a unique fingerprint.

Cite this