Highly Emissive Green Perovskite Nanocrystals in a Solid State Crystalline Matrix

Li Na Quan, Rafael Quintero-Bermudez, Oleksandr Voznyy, Grant Walters, Ankit Jain, James Zhangming Fan, Xueli Zheng, Zhenyu Yang, Edward H. Sargent*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

272 Scopus citations

Abstract

Perovskite nanocrystals (NCs) have attracted attention due to their high photoluminescence quantum yield (PLQY) in solution; however, maintaining high emission efficiency in the solid state remains a challenge. This study presents a solution-phase synthesis of efficient green-emitting perovskite NCs (CsPbBr3) embedded in robust and air-stable rhombic prism hexabromide (Cs4PbBr6) microcrystals, reaching a PLQY of 90%. Theoretical modeling and experimental characterization suggest that lattice matching between the NCs and the matrix contribute to improved passivation, while spatial confinement enhances the radiative rate of the NCs. In addition, dispersing the NCs in a matrix prevents agglomeration, which explains their high PLQY.

Original languageEnglish (US)
Article number1605945
JournalAdvanced Materials
Volume29
Issue number21
DOIs
StatePublished - Jun 6 2017

Keywords

  • cesium–lead halide perovskites
  • endotaxy
  • inorganic halide perovskites
  • nanocrystals

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'Highly Emissive Green Perovskite Nanocrystals in a Solid State Crystalline Matrix'. Together they form a unique fingerprint.

Cite this