Formamidinium Bromide (FABr)

Order Code: M562
MSDS sheet

Price

(excluding Taxes)

£88.00


Formamidinium bromide (FABr), is used mainly as a perovskite precusor material for FAPbBr3 or a range of formamidinium lead bromide-iodide mixed halide perovskites (FAPbIyBr3-y). FAPbBr3 material, having an energy bandgap of 2.23 eV, makes it an ideal candidate for tandem solar cell applications as well.

 Grade Order Code Quantity Price
98% purity M562 5 g £88
98% purity M562 10 g £147
98% purity M562 25 g £226
>99.5% purity M561 5 g £119
>99.5% purity M561 10 g £199

General Information

CAS number 146958-06-7
Chemical formula CH5BrN2
Molecular weight 124.97 g/mol
Synonyms FABr, Formamidine hydrobromide
Classification / Family

Perovskite precursor materials, Perovskite solar cells

Light-emitting diodes.

Product Details

Purity

98%

>99.5% (further purified by double recrystalisation from 98% grade in ethanol)

Melting point 133-140 °C
Colour White powder/crystals

Chemical Structure

chemical structure of Formamidinium Bromide (FABr)

Chemical structure of formamidinium bromide (FABr), CAS No. 146958-06-7, chemical formula CH5BrN2.

Applications

Formamidinium bromide (FABr), is used mainly as a perovskite precusor material for FAPbBr3 or a range of formamidinium lead bromide-iodide mixed halide perovskites (FAPbIyBr3-y). With a combination of different ratios of halides in the perovskite structure, it is possible to tune the the bandgap of the formamidinium lead trihalide system between 1.55 eV and 2.3 eV. This can enable variation in colour, extending the photoexcited species lifetime, enhancing charge transport through the layer and thus an optimisation for applications in multi-junction solar cells [1, 2]. 

FAPbBr3 material, having an energy bandgap of 2.23 eV [1], makes it an ideal candidate for tandem solar cell applications as well.

 

Device structure

FTO/TiO2/FAPbBr3/Spiro-OMeTAD/

Au [1]

FTO/TiO2/MAPbBr3/Spiro-OMeTAD/

Au [1]

Jsc (mA cm-2) 6.6 0.6
Voc (V) 1.35 1.48
FF (%) 0.73 0.48
PCE (%) 6.5 0.4
Device structure

FTO/TiO2/FAPbIBr2/spiro-OMeTAD/Au [2]

Jsc (mA cm-2) 23.3
Voc (V) 0.94
FF (%) 65
PCE 14.2

Literature and reviews

  1. Efficient Planar Heterojunction Perovskite Solar Cells Based on Formamidinium Lead Bromide, F. C. Hanusch et al., J. Phys. Chem. Lett., 5 (16), 2791–2795 (2014), DOI: 10.1021/jz501237m.
  2. Formamidinium lead trihalide: a broadly tunable perovskite for efficient planar heterojunction solar cells, G. E. Eperon et al., Energy Environ. Sci., 7, 982-988 (2014), DOI: 10.1039/C3EE43822H. 
  3. Compositional engineering of perovskite materials for high-performance solar cells, N. Jeon et al., Nature 517, 476–480 (2015), doi:10.1038/nature14133.
  4. Light stability tests of methylammonium and formamidinium Pb-halide perovskites for solar cell applications, G. Murugadoss et al., Jpn. J. Appl. Phys. 54, 08KF08 (2015), http://iopscience.iop.org/1347-4065/54/8S1/08KF08.