14965-49-2

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Questions And Answer

• Specifications

  Chemical formula

  CH₆IN

  Synonyms

  Methylamine hydroiodide

  CAS No.

  14965-49-2

  Chemical name

  Methylammonium iodide

  Physical appearance

  White, crystalline solid

  Purification method

  Recrystallisation (ethanol)

  Purity

  >99.9% (as measured by elemental analysis)

  Molecular weight

  158.97 g/mol

  Recommended solvents for perovskite synthesis

  DMF, DMSO
  ;

• Applications

  Methylammonium iodide (MAI), also referred to as methylamine hydroiodide, is a precursor for the synthesis of organic-inorganic hybrid perovskites for use in FETs, LEDs and PVs.
  Due to the high purity of the methylammonium iodide (99.99%), it should be noted that its solubility is reduced within dimethyl formamide and dimethyl sulfoxide. This reduced solubility is due to the removal of trace amounts of residual hydroiodic acid (HI) used during the synthesis and purification of the material. This can potentially have an impact upon the performance of solar cells leading to a reduction in maximum power conversion efficiency achievable. Adding fixed concentrations of hydroiodic acid to perovskite solutions can allow for the improvement of device metrics. Using high-purity precursor materials allows for accurate addition of amounts of hydroiodic acid giving higher reproducibility to experiments. It is recommended that between 1% and 10% hydroiodic acid is used with high-purity methylammonium iodide to achieve optimal device performance. The amount required depends on the precursors used, solution concentration, solvent used, and processing environment. Therefore, this will need to be adjusted for each individual laboratory and process. ;

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