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

Nat Mater. 2024 Feb;23(2):230-236. doi: 10.1038/s41563-023-01740-9. Epub 2024 Jan 3.

Authors

Craig C Laing¹, Daehan Kim¹, Jinu Park², Jiahong Shen³, Ido Hadar¹, Justin M Hoffman^{1

4}, Jiangang He³, Byungha Shin², Chris Wolverton³, Mercouri G Kanatzidis^{5

6}

Affiliations

¹ Department of Chemistry, Northwestern University, Evanston, IL, USA.
² Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
³ Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA.
⁴ X-Ray Science Division, Argonne National Laboratory, Lemont, IL, USA.
⁵ Department of Chemistry, Northwestern University, Evanston, IL, USA. m-kanatzidis@northwestern.edu.
⁶ Materials Science Division, Argonne National Laboratory, Lemont, IL, USA. m-kanatzidis@northwestern.edu.

PMID: 38172544
DOI: 10.1038/s41563-023-01740-9

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: see text]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.