|Molecular weight||154.05 g/mol|
|Synonyms||BABr, 1-Butanamine hydrobromide, 1-Butanaminium bromide,|
|Classification / Family||Perovskite precursor materials, Perovskite solar cells, Perovskite LEDs|
N-Butylammonium bromide (BABr) is commonly used to tune colloidal perovskite nanoplatelet structures for desired absorption/emission energy and device performance for perovskite LEDs and Solar cells. 
When larger-group ammonium halides that act as surfactants (such as BAI or BABr) are added to the perovskite precursor solution, they dramatically constrain the growth of 3D perovskite grain. This results in the production of crystallites with dimensions as small as 10 nm, and a film roughness of less than 1 nm .
|Device structure||ITO (150 nm)/HTL (30 nm)/BABr:MAPbBr3 (20:100) (70 nm) /TPBi (60 nm)/LiF (1.2 nm)/Al (100 nm) |
|Current Efficiency @ 1000 cd/m2||17.1 cd/A|
|MAax Power Efficiency||13.0 lm W−1|
Literature and reviews
- Highly Tunable Colloidal Perovskite Nanoplatelets through Variable Cation, Metal, and Halide Composition, M. C. Weidman et al., ACS Nano, 10 (8), 7830–7839 (2016); DOI: 10.1021/acsnano.6b03496.
- 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.
- 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.
- Ruddlesden–Popper Hybrid Lead Iodide Perovskite 2D Homologous Semiconductors, C. C. Stoumpos et al., Chem. Mater., 28 (8), 2852–2867 (2016); DOI: 10.1021/acs.chemmater.6b00847.
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