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

doi:10.1038/s41563-023-01740-9

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 journal › Article › peer-review

1 Scopus citations

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 language	English
Pages (from-to)	230-236
Number of pages	7
Journal	Nature Materials
Volume	23
Issue number	2
DOIs	https://doi.org/10.1038/s41563-023-01740-9
State	Published - Feb 2024
Externally published	Yes

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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.",

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

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