Green Emitting Single-Crystalline Bulk Assembly of Metal Halide Clusters with Near-Unity Photoluminescence Quantum Efficiency

  • Chenkun Zhou
  • , Haoran Lin
  • , Jennifer Neu
  • , Yan Zhou
  • , Maya Chaaban
  • , Sujin Lee
  • , Michael Worku
  • , Banghao Chen
  • , Ronald Clark
  • , Wenhao Cheng
  • , Jingjiao Guan
  • , Peter Djurovich
  • , Dongzhou Zhang
  • , Xujie Lü
  • , James Bullock
  • , Chongin Pak
  • , Michael Shatruk
  • , Mao Hua Du
  • , Theo Siegrist
  • , Biwu Ma

Research output: Contribution to journalArticlepeer-review

155 Scopus citations

Abstract

Organic metal halide hybrids with zero-dimensional (0D) structure at the molecular level, or single-crystalline bulk assemblies of metal halides, are an emerging class of light-emitting materials with high photoluminescence quantum efficiencies (PLQEs) and color tunability. Here we report the synthesis and characterization of a new single-crystalline bulk assembly of metal halide clusters, (bmpy)9[ZnCl4]2[Pb3Cl11] (bmpy: 1-butyl-1-methylpyrrolidinium), which exhibits green emission peaked at 512 nm with a remarkable near-unity PLQE at room temperature. Detailed structural and photophysical studies suggest that there are two emitting states in [Pb3Cl11]5- clusters, whose populations are strongly dependent on the surrounding molecular environment that controls the excited-state structural distortion of [Pb3Cl11]5- clusters. High chemical- and photostability have also been demonstrated in this new material.

Original languageEnglish
Pages (from-to)1579-1583
Number of pages5
JournalACS Energy Letters
Volume4
Issue number7
DOIs
StatePublished - Jul 12 2019
Externally publishedYes

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