n-Butylammonium iodide

Order Code: M2057A1
MSDS sheet


(excluding Taxes)


General Information

CAS number 36945-08-1
Chemical formula C4H12IN
Molecular weight 201.05 g/mol
Synonyms BAI, Butylamine Hydroiodide
Classification / Family Perovskite precursor materials, Perovskite solar cells, Perovskite LEDs

Product Details

Purity 98%

Melting point

173 °C (exp.)

Colour Powder/crystals

Chemical Structure

n-butylammonium-iodide, perovskite precursor

Chemical structure of n-butylammonium iodide; CAS No. 36945-08-1; chemical fomula C4H12IN.


N-butylammonium iodide (BAI), is commonly added to 3D-perovskite precursor solutions to hinder the growth of 3D-perovskite grains, dramatically decreasing the roughness of films [1].

Compared with methylammonium iodide (MAI), it is believed that ammonium ions with longer chains will not be able to fit at the corner of PbX4's (X = I, Br, Cl) octahedral layers - resulting in the formation of layered perovskite (a.k.a. Ruddlesden–Popper) structures. BAX-incorporated layers demonstrated great improvement on lifetime and operational stability for LED devices.

Literature and reviews

  1. Efficient perovskite light-emitting diodes featuring nanometre-sized crystallites, Z. Xiao et al., Nat. Photonics, 11, 108–115 (2017); doi:10.1038/nphoton.2016.269.
  2. Efficient ambient-air-stable solar cells with 2D–3D heterostructured butylammonium-caesium-formamidinium lead halide perovskites, Z. Wang et al., Nat. Energy, 6 17135 (2017); doi:10.1038/nenergy.2017.135.
  3. Extremely efficient internal exciton dissociation through edge states in layered 2D perovskites, J.-C. Blancon et al., Science, 10.1126/science.aal4211 (2017); DOI: 10.1126/science.aal4211.

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