Solution-processable mixed-anion cluster chalcohalide Rb6Re6S8I8 in a light-emitting diode

Craig C. Laing, Daehan Kim, Jinu Park, Jiahong Shen, Ido Hadar, Justin M. Hoffman, Jiangang He, Byungha Shin, Chris Wolverton, Mercouri G. Kanatzidis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Rhenium chalcohalide cluster compounds are a photoluminescent family of mixed-anion chalcohalide cluster materials. Here we report the new material Rb6Re6S8I8, which crystallizes in the cubic space group Fm (Formula presented.) m and contains isolated [Re6S8I6]4− clusters. Rb6Re6S8I8 has a band gap of 2.06(5) eV and an ionization energy of 5.51(3) eV, and exhibits broad photoluminescence (PL) ranging from 1.01 eV to 2.12 eV. The room-temperature PL exhibits a PL quantum yield of 42.7% and a PL lifetime of 77 μs (99 μs at 77 K). Rb6Re6S8I8 is found to be soluble in multiple polar solvents including N,N-dimethylformamide, which enables solution processing of the material into films with thickness under 150 nm. Light-emitting diodes based on films of Rb6Re6S8I8 were fabricated, demonstrating the potential for this family of materials in optoelectronic devices.

Original languageEnglish (US)
Pages (from-to)230-236
Number of pages7
JournalNature materials
Volume23
Issue number2
DOIs
StatePublished - Feb 2024

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • General Materials Science

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