Electronic mobility and crystal structures of 2,5-dimethylanilinium triiodide and tin-based organic-inorganic hybrid compounds

Machteld E. Kamminga*, Maria C. Gelvez-Rueda, Sudeep Maheshwari, Irene S. van Droffelaar, Jacob Baas, Graeme R. Blake, Ferdinand C. Grozema, Thomas T. M. Paistra

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

We synthesize single crystals of a new 2,5-dimethylanilinium tin iodide organic-inorganic hybrid compound and 2,5-dimethylanilinium triiodide. Single-crystal X-ray diffraction reveals that the hybrid grows as a unique rhombohedral structure consisting of one-dimensional chains of SnI6-octahedra that share corners and edges to build up a ribbon along the [111] direction. Notably, we find that hypophosphorous acid, H3PO2, is of central importance to the formation of this hybrid. In the absence of H3PO2, we synthesize 2,5-dimethylanilinium triiodide from the same starting compounds. We investigate the synthesis routes that drive the growth of these two compounds with distinct crystal structures, appearance and properties. Pulse-radiolysis time-resolved microwave conductivity measurements and density functional theory calculations reveal that both compounds have low charge carrier mobilities and very long lifetimes, consistent with their one-dimensional structural characteristics. Our findings give a better understanding of the relation between synthesis, crystal structures and charge carrier mobilities.

Original languageEnglish
Pages (from-to)593-600
Number of pages8
JournalJournal of Solid State Chemistry
Volume270
DOIs
Publication statusPublished - Feb-2019

Keywords

  • Organic-organic hybrids
  • Tin iodide
  • Triiodide
  • Hypophosphorous acid
  • Single-crystal XRD
  • Microwave conductivity
  • RESOLVED MICROWAVE CONDUCTIVITY
  • CRYSTALLOGRAPHY OPEN DATABASE
  • PEROVSKITE SOLAR-CELLS
  • OPEN-ACCESS COLLECTION
  • HALIDE PEROVSKITES
  • EXCITONS

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