Efficient Luminescence from Perovskite Quantum Dot Solids

Younghoon Kim, Emre Yassitepe, Oleksandr Voznyy, Riccardo Comin, Grant Walters, Xiwen Gong, Pongsakorn Kanjanaboos, Ana F. Nogueira, Edward H. Sargent*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

474 Scopus citations

Abstract

Nanocrystals of CsPbX3 perovskites are promising materials for light-emitting optoelectronics because of their colloidal stability, optically tunable bandgap, bright photoluminescence, and excellent photoluminescence quantum yield. Despite their promise, nanocrystal-only films of CsPbX3 perovskites have not yet been fabricated; instead, highly insulating polymers have been relied upon to compensate for nanocrystals' unstable surfaces. We develop solution chemistry that enables single-step casting of perovskite nanocrystal films and overcomes problems in both perovskite quantum dot purification and film fabrication. Centrifugally cast films retain bright photoluminescence and achieve dense and homogeneous morphologies. The new materials offer a platform for optoelectronic applications of perovskite quantum dot solids.

Original languageEnglish (US)
Pages (from-to)25007-25013
Number of pages7
JournalACS Applied Materials and Interfaces
Volume7
Issue number45
DOIs
StatePublished - Nov 3 2015

Keywords

  • centrifugal casting
  • cesium lead halide
  • nanocrystal films
  • perovskites
  • quantum dots

ASJC Scopus subject areas

  • General Materials Science

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