Ligand Control of Structural Diversity in Luminescent Hybrid Copper(I) Iodides

Shuxin Wang, Emily E. Morgan, Shobhana Panuganti, Lingling Mao, Pratap Vishnoi, Guang Wu, Quanlin Liu, Mercouri G. Kanatzidis, Richard D. Schaller, Ram Seshadri*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Copper(I) iodide hybrids are of interest for next-generation lighting technologies because of their efficient luminescence in the absence of rare-earth elements. Here, we report 10 structurally diverse hybrid copper(I) iodides that emit in the green-red region with quantum yields reaching 67%. The compounds display a diversity of structures including ones with one-dimensional (1D) Cu-1 chains, Cu2I2 rhomboid dimers, and structures with two different arrangements of Cu4I4 tetramers. The compounds with Cu2I2 rhomboid dimers or Cu4I4 cubane tetramers have higher photoluminescence quantum yields than those with Cu-I 1D chains and octahedral Cu4I4 tetramers, owing to the optimal degree of condensation of the inorganic motifs, which suppresses nonradiative processes. Electronic structure calculations on these compounds point out the critical influence of the inorganic motif and organic ligand on the nature of the band gaps and thus the excitation characteristics. Temperature-dependent photoluminescence spectra are presented to better understand the nature of luminescence in compounds with different inorganic motifs. The emerging understanding of composition-structure-property correlations in this family provides inspiration for the rational design of hybrid phosphors for general lighting applications.

Original languageEnglish (US)
Pages (from-to)3206-3216
Number of pages11
JournalChemistry of Materials
Issue number7
StatePublished - Apr 12 2022

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry


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