CAS Number 879643-71-7
Formamidinium iodide (CAS number 879643-71-7) is an iodide salt of formamidine, the simplest amidine. Formamidinium iodide is often used as a precusor for synthesizing formamidinium lead iodide applied in perovskite solar cells. Formamidinium lead iodide shows a narrower bandgap than the commonly used methylammonium lead iodide (1.48 eV compared to ~1.57 eV), and hence lies closer to that favourable for optimum solar conversion efficiencies. With an approach of FAPbI3 crystallisation by the direct intramolecular exchange of dimethylsulfoxide (DMSO) molecules intercalated in PbI2 with formamidinium iodide, device with performance over 20% has been fabricated.
M552: 99.995% (ICP-OES)
M551: >99.995% (further purified by double recrystallisation from 99.9% grade in ethanol)
CAS number
879643-71-7
Chemical formula
CH5IN2
Molecular weight
171.97 g/mol
Synonyms
FAI, Formamidine hydroiodide
Classification / Family
Perovskite precursor materials, Perovskite solar cells, OLEDs
Product Details
Purity
Melting point
242 °C
Colour
White powder/crystals
Chemical Structure
Chemical structure of formamidinium iodide (FAI), CAS No. 879643-71-7
Device structure
FTO/TiO2/FAPbIBr2/spiro-OMeTAD/Au [1]
JSC (mA cm-2)
23.3
VOC (V)
0.94
FF (%)
65
PCE (%)
14.2
Device structure
FTO/TiO2/(FAPbI3)0.85(MAPbBr3)0.15/PTAA/Au [4]
JSC (mA cm-2)
22.5
VOC (V)
1.11
FF (%)
73.2
PCE (%)
18.4
Device structure
FTO/bl-TiO2/mp-TiO2/FAPbI3 (DMSO)/PTAA/Au [5]
JSC (mA cm-2)
24.7
VOC (V)
1.06
FF (%)
77.5
PCE (%)
20.2
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