Formamidinium halide salts as precursors of carbon nitrides

Ciria-Ramos, I.; Navascués, N.; Diaw, F.; Furgeaud, C.; Arenal, R.; Ansón-Casaos, A.; Haro, M. & Juarez-Perez, E. J. Formamidinium halide salts as precursors of carbon nitrides Carbon, 2022, 196, 1035-1046 10.1016/j.carbon.2022.05.051

Ciria-Ramos, I.; Navascués, N.; Diaw, F.; Furgeaud, C.; Arenal, R.; Ansón-Casaos, A.; Haro, M. & Juarez-Perez, E. J. Formamidinium halide salts as precursors of carbon nitrides Carbon, 2022, 196, 1035-1046 10.1016/j.carbon.2022.05.051

Pyrolysis of formamidinium halide salts (FAI, FABr) results in a new type of amorphous carbon nitride materials with a mass fraction of 40–50% nitrogen content. Pyrolysis temperature drives final chemical composition, morphology, optical and electrical properties of the material independently of the halide precursor and identi­fying triazine ring, instead of typical heptazine unit, as the main building block of this material. We elaborated a temperature dependent mechanism of formation for these materials and foresee its potential value as native passivation layer in the field of perovskite solar cells.

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